/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 19:42:50,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 19:42:50,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 19:42:50,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-13 19:42:50,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-13 19:42:50,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-13 19:42:50,687 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-13 19:42:50,690 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-13 19:42:50,691 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-13 19:42:50,692 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-13 19:42:50,693 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-13 19:42:50,694 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-13 19:42:50,694 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-13 19:42:50,695 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-13 19:42:50,696 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-13 19:42:50,697 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-13 19:42:50,698 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-13 19:42:50,699 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-13 19:42:50,701 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-13 19:42:50,702 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-13 19:42:50,704 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-13 19:42:50,705 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-13 19:42:50,717 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-13 19:42:50,718 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-13 19:42:50,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-13 19:42:50,721 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-13 19:42:50,721 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-13 19:42:50,722 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-13 19:42:50,729 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-13 19:42:50,730 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-13 19:42:50,730 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-13 19:42:50,731 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-13 19:42:50,731 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-13 19:42:50,734 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-13 19:42:50,734 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-13 19:42:50,734 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-13 19:42:50,735 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-13 19:42:50,735 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-13 19:42:50,735 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-13 19:42:50,736 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-13 19:42:50,736 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-13 19:42:50,737 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 19:42:50,758 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 19:42:50,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 19:42:50,758 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 19:42:50,758 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 19:42:50,759 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 19:42:50,760 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 19:42:50,760 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 19:42:50,760 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 19:42:50,760 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 19:42:50,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 19:42:50,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 19:42:50,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 19:42:50,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 19:42:50,761 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 19:42:50,762 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 19:42:50,762 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 19:42:50,762 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 19:42:50,762 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 19:42:50,762 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 19:42:50,763 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 19:42:50,763 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 19:42:50,763 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 19:42:50,763 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 19:42:50,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:42:50,764 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 19:42:50,764 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 19:42:50,764 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 19:42:50,764 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 19:42:50,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 19:42:50,765 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 19:42:50,765 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 19:42:50,765 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 19:42:51,050 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 19:42:51,069 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 19:42:51,072 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 19:42:51,073 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 19:42:51,075 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 19:42:51,075 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-symm.wvr.bpl [2021-07-13 19:42:51,076 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-symm.wvr.bpl' [2021-07-13 19:42:51,244 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 19:42:51,246 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 19:42:51,246 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 19:42:51,247 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 19:42:51,247 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 19:42:51,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:42:51" (1/1) ... [2021-07-13 19:42:51,267 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:42:51" (1/1) ... [2021-07-13 19:42:51,272 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 19:42:51,277 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 19:42:51,277 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 19:42:51,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 19:42:51,285 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:42:51" (1/1) ... [2021-07-13 19:42:51,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:42:51" (1/1) ... [2021-07-13 19:42:51,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:42:51" (1/1) ... [2021-07-13 19:42:51,286 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:42:51" (1/1) ... [2021-07-13 19:42:51,289 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:42:51" (1/1) ... [2021-07-13 19:42:51,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:42:51" (1/1) ... [2021-07-13 19:42:51,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:42:51" (1/1) ... [2021-07-13 19:42:51,293 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 19:42:51,293 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 19:42:51,294 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 19:42:51,294 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 19:42:51,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:42:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:42:51,355 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 19:42:51,355 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 19:42:51,355 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 19:42:51,355 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 19:42:51,355 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 19:42:51,356 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 19:42:51,356 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 19:42:51,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 19:42:51,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 19:42:51,357 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 19:42:51,580 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 19:42:51,580 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-07-13 19:42:51,585 INFO L202 PluginConnector]: Adding new model word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:42:51 BoogieIcfgContainer [2021-07-13 19:42:51,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 19:42:51,587 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 19:42:51,587 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 19:42:51,589 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 19:42:51,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:42:51" (1/2) ... [2021-07-13 19:42:51,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6af5c571 and model type word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 07:42:51, skipping insertion in model container [2021-07-13 19:42:51,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:42:51" (2/2) ... [2021-07-13 19:42:51,592 INFO L111 eAbstractionObserver]: Analyzing ICFG word-symm.wvr.bpl [2021-07-13 19:42:51,597 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 19:42:51,597 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 19:42:51,597 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 19:42:51,598 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 19:42:51,621 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-13 19:42:51,639 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-13 19:42:51,655 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 19:42:51,655 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 19:42:51,655 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 19:42:51,655 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 19:42:51,655 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 19:42:51,655 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 19:42:51,656 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 19:42:51,656 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 19:42:51,663 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 20 transitions, 56 flow [2021-07-13 19:42:51,673 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:51,675 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:51,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-13 19:42:51,680 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:51,681 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:51,681 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:51,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:51,686 INFO L82 PathProgramCache]: Analyzing trace with hash 942627414, now seen corresponding path program 1 times [2021-07-13 19:42:51,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:51,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030306177] [2021-07-13 19:42:51,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:51,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:51,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:51,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:51,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030306177] [2021-07-13 19:42:51,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030306177] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:42:51,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:42:51,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:42:51,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289696271] [2021-07-13 19:42:51,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:42:51,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:51,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:42:51,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:42:51,936 INFO L87 Difference]: Start difference. First operand has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:52,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:52,014 INFO L93 Difference]: Finished difference Result 52 states and 96 transitions. [2021-07-13 19:42:52,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:42:52,016 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-07-13 19:42:52,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:52,028 INFO L225 Difference]: With dead ends: 52 [2021-07-13 19:42:52,029 INFO L226 Difference]: Without dead ends: 40 [2021-07-13 19:42:52,031 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:42:52,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-07-13 19:42:52,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2021-07-13 19:42:52,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:52,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 60 transitions. [2021-07-13 19:42:52,068 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 60 transitions. Word has length 10 [2021-07-13 19:42:52,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:52,068 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 60 transitions. [2021-07-13 19:42:52,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:52,068 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 60 transitions. [2021-07-13 19:42:52,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-13 19:42:52,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:52,069 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:52,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 19:42:52,070 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:52,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:52,075 INFO L82 PathProgramCache]: Analyzing trace with hash 382081942, now seen corresponding path program 2 times [2021-07-13 19:42:52,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:52,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526120815] [2021-07-13 19:42:52,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:52,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:52,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:52,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:52,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526120815] [2021-07-13 19:42:52,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526120815] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:42:52,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:42:52,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:42:52,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241712108] [2021-07-13 19:42:52,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:42:52,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:52,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:42:52,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:42:52,205 INFO L87 Difference]: Start difference. First operand 28 states and 60 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:52,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:52,268 INFO L93 Difference]: Finished difference Result 48 states and 86 transitions. [2021-07-13 19:42:52,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:42:52,269 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-07-13 19:42:52,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:52,270 INFO L225 Difference]: With dead ends: 48 [2021-07-13 19:42:52,270 INFO L226 Difference]: Without dead ends: 39 [2021-07-13 19:42:52,271 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:42:52,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-07-13 19:42:52,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2021-07-13 19:42:52,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:52,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 59 transitions. [2021-07-13 19:42:52,282 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 59 transitions. Word has length 10 [2021-07-13 19:42:52,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:52,283 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 59 transitions. [2021-07-13 19:42:52,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:52,283 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 59 transitions. [2021-07-13 19:42:52,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-13 19:42:52,284 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:52,284 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:52,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 19:42:52,285 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:52,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:52,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1385928133, now seen corresponding path program 1 times [2021-07-13 19:42:52,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:52,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718024820] [2021-07-13 19:42:52,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:52,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:52,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:52,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:52,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718024820] [2021-07-13 19:42:52,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718024820] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:42:52,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:42:52,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:42:52,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518454518] [2021-07-13 19:42:52,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 19:42:52,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:52,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 19:42:52,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:42:52,328 INFO L87 Difference]: Start difference. First operand 28 states and 59 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:52,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:52,338 INFO L93 Difference]: Finished difference Result 28 states and 52 transitions. [2021-07-13 19:42:52,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 19:42:52,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-13 19:42:52,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:52,340 INFO L225 Difference]: With dead ends: 28 [2021-07-13 19:42:52,340 INFO L226 Difference]: Without dead ends: 28 [2021-07-13 19:42:52,340 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:42:52,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-07-13 19:42:52,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-07-13 19:42:52,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:52,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 52 transitions. [2021-07-13 19:42:52,344 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 52 transitions. Word has length 11 [2021-07-13 19:42:52,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:52,344 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 52 transitions. [2021-07-13 19:42:52,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:52,344 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 52 transitions. [2021-07-13 19:42:52,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 19:42:52,345 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:52,345 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:52,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 19:42:52,345 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:52,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:52,346 INFO L82 PathProgramCache]: Analyzing trace with hash 924188067, now seen corresponding path program 1 times [2021-07-13 19:42:52,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:52,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627084599] [2021-07-13 19:42:52,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:52,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:52,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:52,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627084599] [2021-07-13 19:42:52,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627084599] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:42:52,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:42:52,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 19:42:52,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033286453] [2021-07-13 19:42:52,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:42:52,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:52,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:42:52,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:42:52,466 INFO L87 Difference]: Start difference. First operand 28 states and 52 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:52,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:52,539 INFO L93 Difference]: Finished difference Result 60 states and 109 transitions. [2021-07-13 19:42:52,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:42:52,540 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-13 19:42:52,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:52,544 INFO L225 Difference]: With dead ends: 60 [2021-07-13 19:42:52,544 INFO L226 Difference]: Without dead ends: 53 [2021-07-13 19:42:52,545 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 49.9ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:42:52,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-07-13 19:42:52,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2021-07-13 19:42:52,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:52,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 71 transitions. [2021-07-13 19:42:52,561 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 71 transitions. Word has length 12 [2021-07-13 19:42:52,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:52,561 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 71 transitions. [2021-07-13 19:42:52,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:52,561 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 71 transitions. [2021-07-13 19:42:52,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 19:42:52,563 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:52,563 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:52,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 19:42:52,563 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:52,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:52,564 INFO L82 PathProgramCache]: Analyzing trace with hash -28486685, now seen corresponding path program 2 times [2021-07-13 19:42:52,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:52,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795008044] [2021-07-13 19:42:52,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:52,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:52,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:52,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:52,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795008044] [2021-07-13 19:42:52,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795008044] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:42:52,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:42:52,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 19:42:52,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143711353] [2021-07-13 19:42:52,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:42:52,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:52,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:42:52,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:42:52,666 INFO L87 Difference]: Start difference. First operand 38 states and 71 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:52,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:52,725 INFO L93 Difference]: Finished difference Result 75 states and 133 transitions. [2021-07-13 19:42:52,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:42:52,726 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-13 19:42:52,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:52,727 INFO L225 Difference]: With dead ends: 75 [2021-07-13 19:42:52,727 INFO L226 Difference]: Without dead ends: 68 [2021-07-13 19:42:52,728 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 40.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:42:52,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-07-13 19:42:52,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 39. [2021-07-13 19:42:52,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:52,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 75 transitions. [2021-07-13 19:42:52,738 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 75 transitions. Word has length 12 [2021-07-13 19:42:52,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:52,741 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 75 transitions. [2021-07-13 19:42:52,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:52,741 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 75 transitions. [2021-07-13 19:42:52,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 19:42:52,742 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:52,742 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:52,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-13 19:42:52,742 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:52,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:52,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1663097951, now seen corresponding path program 3 times [2021-07-13 19:42:52,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:52,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527724464] [2021-07-13 19:42:52,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:52,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:52,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:52,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:52,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527724464] [2021-07-13 19:42:52,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527724464] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:42:52,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:42:52,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 19:42:52,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240022548] [2021-07-13 19:42:52,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:42:52,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:52,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:42:52,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:42:52,837 INFO L87 Difference]: Start difference. First operand 39 states and 75 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:52,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:52,890 INFO L93 Difference]: Finished difference Result 63 states and 115 transitions. [2021-07-13 19:42:52,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:42:52,891 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-13 19:42:52,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:52,891 INFO L225 Difference]: With dead ends: 63 [2021-07-13 19:42:52,892 INFO L226 Difference]: Without dead ends: 56 [2021-07-13 19:42:52,892 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 38.3ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:42:52,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-07-13 19:42:52,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2021-07-13 19:42:52,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.95) internal successors, (78), 40 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:52,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 78 transitions. [2021-07-13 19:42:52,902 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 78 transitions. Word has length 12 [2021-07-13 19:42:52,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:52,902 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 78 transitions. [2021-07-13 19:42:52,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:52,903 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 78 transitions. [2021-07-13 19:42:52,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 19:42:52,907 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:52,907 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:52,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-13 19:42:52,910 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:52,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:52,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1716368849, now seen corresponding path program 4 times [2021-07-13 19:42:52,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:52,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587865665] [2021-07-13 19:42:52,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:52,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:52,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:52,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:52,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587865665] [2021-07-13 19:42:52,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587865665] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:42:52,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:42:52,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 19:42:52,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534213487] [2021-07-13 19:42:52,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:42:52,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:52,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:42:52,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:42:52,987 INFO L87 Difference]: Start difference. First operand 41 states and 78 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:53,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:53,050 INFO L93 Difference]: Finished difference Result 81 states and 146 transitions. [2021-07-13 19:42:53,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:42:53,050 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-13 19:42:53,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:53,051 INFO L225 Difference]: With dead ends: 81 [2021-07-13 19:42:53,052 INFO L226 Difference]: Without dead ends: 74 [2021-07-13 19:42:53,052 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:42:53,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-07-13 19:42:53,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 43. [2021-07-13 19:42:53,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:53,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 85 transitions. [2021-07-13 19:42:53,061 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 85 transitions. Word has length 12 [2021-07-13 19:42:53,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:53,061 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 85 transitions. [2021-07-13 19:42:53,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:53,061 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 85 transitions. [2021-07-13 19:42:53,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 19:42:53,062 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:53,062 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:53,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-13 19:42:53,062 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:53,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:53,062 INFO L82 PathProgramCache]: Analyzing trace with hash -887013811, now seen corresponding path program 5 times [2021-07-13 19:42:53,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:53,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216908864] [2021-07-13 19:42:53,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:53,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:53,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:53,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:53,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216908864] [2021-07-13 19:42:53,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216908864] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:42:53,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:42:53,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 19:42:53,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726574419] [2021-07-13 19:42:53,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:42:53,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:53,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:42:53,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:42:53,121 INFO L87 Difference]: Start difference. First operand 43 states and 85 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:53,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:53,174 INFO L93 Difference]: Finished difference Result 83 states and 148 transitions. [2021-07-13 19:42:53,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:42:53,175 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-13 19:42:53,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:53,176 INFO L225 Difference]: With dead ends: 83 [2021-07-13 19:42:53,176 INFO L226 Difference]: Without dead ends: 76 [2021-07-13 19:42:53,176 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:42:53,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-07-13 19:42:53,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 42. [2021-07-13 19:42:53,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:53,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 81 transitions. [2021-07-13 19:42:53,186 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 81 transitions. Word has length 12 [2021-07-13 19:42:53,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:53,187 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 81 transitions. [2021-07-13 19:42:53,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:53,190 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 81 transitions. [2021-07-13 19:42:53,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 19:42:53,190 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:53,190 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:53,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-13 19:42:53,191 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:53,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:53,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1520341375, now seen corresponding path program 6 times [2021-07-13 19:42:53,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:53,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408516639] [2021-07-13 19:42:53,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:53,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:53,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:53,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408516639] [2021-07-13 19:42:53,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408516639] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:42:53,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:42:53,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 19:42:53,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842751445] [2021-07-13 19:42:53,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:42:53,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:53,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:42:53,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:42:53,253 INFO L87 Difference]: Start difference. First operand 42 states and 81 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:53,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:53,303 INFO L93 Difference]: Finished difference Result 68 states and 124 transitions. [2021-07-13 19:42:53,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:42:53,304 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-13 19:42:53,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:53,304 INFO L225 Difference]: With dead ends: 68 [2021-07-13 19:42:53,304 INFO L226 Difference]: Without dead ends: 61 [2021-07-13 19:42:53,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:42:53,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-07-13 19:42:53,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 44. [2021-07-13 19:42:53,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 43 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:53,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 84 transitions. [2021-07-13 19:42:53,307 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 84 transitions. Word has length 12 [2021-07-13 19:42:53,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:53,307 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 84 transitions. [2021-07-13 19:42:53,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:53,307 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 84 transitions. [2021-07-13 19:42:53,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:42:53,308 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:53,308 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:53,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-13 19:42:53,308 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:53,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:53,308 INFO L82 PathProgramCache]: Analyzing trace with hash 2043306169, now seen corresponding path program 1 times [2021-07-13 19:42:53,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:53,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693496505] [2021-07-13 19:42:53,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:53,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:53,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:53,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693496505] [2021-07-13 19:42:53,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693496505] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:42:53,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:42:53,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:42:53,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901005879] [2021-07-13 19:42:53,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:42:53,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:53,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:42:53,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:42:53,339 INFO L87 Difference]: Start difference. First operand 44 states and 84 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:53,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:53,375 INFO L93 Difference]: Finished difference Result 62 states and 113 transitions. [2021-07-13 19:42:53,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:42:53,375 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:42:53,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:53,376 INFO L225 Difference]: With dead ends: 62 [2021-07-13 19:42:53,376 INFO L226 Difference]: Without dead ends: 54 [2021-07-13 19:42:53,376 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:42:53,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-07-13 19:42:53,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2021-07-13 19:42:53,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:53,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2021-07-13 19:42:53,378 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2021-07-13 19:42:53,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:53,378 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2021-07-13 19:42:53,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:53,378 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2021-07-13 19:42:53,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:42:53,383 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:53,383 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:53,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-07-13 19:42:53,384 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:53,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:53,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1561333194, now seen corresponding path program 1 times [2021-07-13 19:42:53,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:53,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370298979] [2021-07-13 19:42:53,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:53,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:53,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:53,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:53,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370298979] [2021-07-13 19:42:53,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370298979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:53,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416516347] [2021-07-13 19:42:53,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:53,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:53,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:42:53,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:53,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:53,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416516347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:53,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:53,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-13 19:42:53,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549463511] [2021-07-13 19:42:53,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:42:53,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:53,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:42:53,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:42:53,615 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:53,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:53,673 INFO L93 Difference]: Finished difference Result 58 states and 109 transitions. [2021-07-13 19:42:53,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:42:53,673 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:42:53,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:53,674 INFO L225 Difference]: With dead ends: 58 [2021-07-13 19:42:53,674 INFO L226 Difference]: Without dead ends: 58 [2021-07-13 19:42:53,674 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:42:53,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-07-13 19:42:53,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 40. [2021-07-13 19:42:53,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:53,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 77 transitions. [2021-07-13 19:42:53,676 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 77 transitions. Word has length 13 [2021-07-13 19:42:53,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:53,676 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 77 transitions. [2021-07-13 19:42:53,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:53,677 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 77 transitions. [2021-07-13 19:42:53,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:42:53,677 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:53,677 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:53,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-07-13 19:42:53,901 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:53,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:53,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1719807367, now seen corresponding path program 2 times [2021-07-13 19:42:53,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:53,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286975733] [2021-07-13 19:42:53,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:53,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:53,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:53,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:53,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286975733] [2021-07-13 19:42:53,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286975733] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:42:53,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:42:53,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:42:53,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928546890] [2021-07-13 19:42:53,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:42:53,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:53,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:42:53,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:42:53,938 INFO L87 Difference]: Start difference. First operand 40 states and 77 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:53,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:53,993 INFO L93 Difference]: Finished difference Result 79 states and 142 transitions. [2021-07-13 19:42:53,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:42:53,993 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:42:53,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:53,994 INFO L225 Difference]: With dead ends: 79 [2021-07-13 19:42:53,994 INFO L226 Difference]: Without dead ends: 76 [2021-07-13 19:42:53,994 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:42:53,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-07-13 19:42:53,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 45. [2021-07-13 19:42:53,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:53,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 89 transitions. [2021-07-13 19:42:53,998 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 89 transitions. Word has length 13 [2021-07-13 19:42:53,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:53,998 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 89 transitions. [2021-07-13 19:42:53,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:53,998 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 89 transitions. [2021-07-13 19:42:53,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:42:53,999 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:53,999 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:53,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-07-13 19:42:53,999 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:54,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:54,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1972962632, now seen corresponding path program 2 times [2021-07-13 19:42:54,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:54,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391036434] [2021-07-13 19:42:54,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:54,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:54,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:54,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:54,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391036434] [2021-07-13 19:42:54,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391036434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:54,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485629920] [2021-07-13 19:42:54,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:54,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:54,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:54,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:42:54,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:54,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:54,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485629920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:54,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:54,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 19:42:54,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859002138] [2021-07-13 19:42:54,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:42:54,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:54,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:42:54,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:42:54,167 INFO L87 Difference]: Start difference. First operand 45 states and 89 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:54,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:54,207 INFO L93 Difference]: Finished difference Result 69 states and 128 transitions. [2021-07-13 19:42:54,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:42:54,207 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:42:54,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:54,209 INFO L225 Difference]: With dead ends: 69 [2021-07-13 19:42:54,209 INFO L226 Difference]: Without dead ends: 69 [2021-07-13 19:42:54,209 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:42:54,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-07-13 19:42:54,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 45. [2021-07-13 19:42:54,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:54,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 89 transitions. [2021-07-13 19:42:54,213 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 89 transitions. Word has length 13 [2021-07-13 19:42:54,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:54,214 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 89 transitions. [2021-07-13 19:42:54,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:54,214 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 89 transitions. [2021-07-13 19:42:54,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:42:54,215 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:54,215 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:54,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-13 19:42:54,438 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:54,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:54,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1874666941, now seen corresponding path program 3 times [2021-07-13 19:42:54,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:54,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901875734] [2021-07-13 19:42:54,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:54,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:54,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:54,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:54,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901875734] [2021-07-13 19:42:54,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901875734] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:42:54,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:42:54,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:42:54,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575819871] [2021-07-13 19:42:54,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:42:54,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:54,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:42:54,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:42:54,477 INFO L87 Difference]: Start difference. First operand 45 states and 89 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:54,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:54,524 INFO L93 Difference]: Finished difference Result 64 states and 121 transitions. [2021-07-13 19:42:54,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:42:54,526 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:42:54,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:54,526 INFO L225 Difference]: With dead ends: 64 [2021-07-13 19:42:54,526 INFO L226 Difference]: Without dead ends: 64 [2021-07-13 19:42:54,526 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:42:54,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-07-13 19:42:54,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 42. [2021-07-13 19:42:54,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:54,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 83 transitions. [2021-07-13 19:42:54,528 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 83 transitions. Word has length 13 [2021-07-13 19:42:54,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:54,528 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 83 transitions. [2021-07-13 19:42:54,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:54,528 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 83 transitions. [2021-07-13 19:42:54,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:42:54,529 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:54,529 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:54,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-07-13 19:42:54,529 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:54,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:54,529 INFO L82 PathProgramCache]: Analyzing trace with hash -108130304, now seen corresponding path program 3 times [2021-07-13 19:42:54,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:54,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544518164] [2021-07-13 19:42:54,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:54,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:54,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:54,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:54,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544518164] [2021-07-13 19:42:54,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544518164] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:42:54,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:42:54,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:42:54,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327593139] [2021-07-13 19:42:54,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:42:54,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:54,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:42:54,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:42:54,561 INFO L87 Difference]: Start difference. First operand 42 states and 83 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:54,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:54,599 INFO L93 Difference]: Finished difference Result 47 states and 89 transitions. [2021-07-13 19:42:54,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:42:54,600 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:42:54,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:54,600 INFO L225 Difference]: With dead ends: 47 [2021-07-13 19:42:54,601 INFO L226 Difference]: Without dead ends: 45 [2021-07-13 19:42:54,601 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:42:54,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-07-13 19:42:54,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-07-13 19:42:54,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.0) internal successors, (82), 41 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:54,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 82 transitions. [2021-07-13 19:42:54,603 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 82 transitions. Word has length 13 [2021-07-13 19:42:54,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:54,603 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 82 transitions. [2021-07-13 19:42:54,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:54,603 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 82 transitions. [2021-07-13 19:42:54,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:42:54,603 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:54,603 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:54,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-07-13 19:42:54,604 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:54,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:54,604 INFO L82 PathProgramCache]: Analyzing trace with hash 831106635, now seen corresponding path program 4 times [2021-07-13 19:42:54,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:54,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993728586] [2021-07-13 19:42:54,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:54,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:54,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:54,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:54,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993728586] [2021-07-13 19:42:54,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993728586] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:42:54,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:42:54,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:42:54,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341522642] [2021-07-13 19:42:54,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:42:54,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:54,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:42:54,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:42:54,635 INFO L87 Difference]: Start difference. First operand 42 states and 82 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:54,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:54,670 INFO L93 Difference]: Finished difference Result 62 states and 111 transitions. [2021-07-13 19:42:54,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:42:54,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:42:54,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:54,672 INFO L225 Difference]: With dead ends: 62 [2021-07-13 19:42:54,672 INFO L226 Difference]: Without dead ends: 59 [2021-07-13 19:42:54,672 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:42:54,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-07-13 19:42:54,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2021-07-13 19:42:54,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:54,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2021-07-13 19:42:54,674 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 13 [2021-07-13 19:42:54,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:54,674 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2021-07-13 19:42:54,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:54,674 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2021-07-13 19:42:54,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:42:54,675 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:54,675 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:54,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-07-13 19:42:54,675 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:54,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:54,675 INFO L82 PathProgramCache]: Analyzing trace with hash 577951370, now seen corresponding path program 4 times [2021-07-13 19:42:54,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:54,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217539309] [2021-07-13 19:42:54,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:54,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:54,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:54,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:54,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217539309] [2021-07-13 19:42:54,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217539309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:54,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80192725] [2021-07-13 19:42:54,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:54,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:42:54,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:54,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:42:54,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:54,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:54,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80192725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:54,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:54,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 19:42:54,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207101526] [2021-07-13 19:42:54,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:42:54,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:54,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:42:54,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:42:54,802 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:54,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:54,835 INFO L93 Difference]: Finished difference Result 63 states and 116 transitions. [2021-07-13 19:42:54,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:42:54,836 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:42:54,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:54,836 INFO L225 Difference]: With dead ends: 63 [2021-07-13 19:42:54,836 INFO L226 Difference]: Without dead ends: 63 [2021-07-13 19:42:54,837 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:42:54,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-07-13 19:42:54,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2021-07-13 19:42:54,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:54,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2021-07-13 19:42:54,839 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 13 [2021-07-13 19:42:54,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:54,839 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2021-07-13 19:42:54,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:54,839 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2021-07-13 19:42:54,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:42:54,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:54,840 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:55,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 19:42:55,053 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:55,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:55,053 INFO L82 PathProgramCache]: Analyzing trace with hash 130613647, now seen corresponding path program 5 times [2021-07-13 19:42:55,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:55,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118440269] [2021-07-13 19:42:55,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:55,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:55,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:55,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:55,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118440269] [2021-07-13 19:42:55,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118440269] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:42:55,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:42:55,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:42:55,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696862244] [2021-07-13 19:42:55,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:42:55,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:55,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:42:55,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:42:55,103 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:55,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:55,146 INFO L93 Difference]: Finished difference Result 62 states and 114 transitions. [2021-07-13 19:42:55,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:42:55,147 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:42:55,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:55,148 INFO L225 Difference]: With dead ends: 62 [2021-07-13 19:42:55,148 INFO L226 Difference]: Without dead ends: 62 [2021-07-13 19:42:55,148 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:42:55,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-07-13 19:42:55,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2021-07-13 19:42:55,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:55,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2021-07-13 19:42:55,150 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 13 [2021-07-13 19:42:55,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:55,151 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2021-07-13 19:42:55,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:55,151 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2021-07-13 19:42:55,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:42:55,151 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:55,151 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:55,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-07-13 19:42:55,151 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:55,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:55,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1852183598, now seen corresponding path program 5 times [2021-07-13 19:42:55,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:55,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690184070] [2021-07-13 19:42:55,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:55,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:55,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:55,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:55,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690184070] [2021-07-13 19:42:55,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690184070] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:42:55,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:42:55,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:42:55,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121821218] [2021-07-13 19:42:55,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:42:55,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:55,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:42:55,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:42:55,175 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:55,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:55,208 INFO L93 Difference]: Finished difference Result 65 states and 117 transitions. [2021-07-13 19:42:55,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:42:55,208 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:42:55,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:55,209 INFO L225 Difference]: With dead ends: 65 [2021-07-13 19:42:55,209 INFO L226 Difference]: Without dead ends: 63 [2021-07-13 19:42:55,209 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:42:55,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-07-13 19:42:55,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 45. [2021-07-13 19:42:55,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:55,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 87 transitions. [2021-07-13 19:42:55,211 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 87 transitions. Word has length 13 [2021-07-13 19:42:55,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:55,211 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 87 transitions. [2021-07-13 19:42:55,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:55,211 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 87 transitions. [2021-07-13 19:42:55,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:42:55,212 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:55,212 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:55,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-07-13 19:42:55,212 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:55,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:55,212 INFO L82 PathProgramCache]: Analyzing trace with hash 133239423, now seen corresponding path program 6 times [2021-07-13 19:42:55,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:55,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303333206] [2021-07-13 19:42:55,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:55,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:55,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:55,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:55,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303333206] [2021-07-13 19:42:55,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303333206] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:42:55,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:42:55,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:42:55,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562102067] [2021-07-13 19:42:55,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:42:55,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:55,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:42:55,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:42:55,243 INFO L87 Difference]: Start difference. First operand 45 states and 87 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:55,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:55,279 INFO L93 Difference]: Finished difference Result 60 states and 108 transitions. [2021-07-13 19:42:55,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:42:55,280 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:42:55,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:55,280 INFO L225 Difference]: With dead ends: 60 [2021-07-13 19:42:55,280 INFO L226 Difference]: Without dead ends: 60 [2021-07-13 19:42:55,281 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:42:55,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-07-13 19:42:55,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 39. [2021-07-13 19:42:55,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:55,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 75 transitions. [2021-07-13 19:42:55,282 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 75 transitions. Word has length 13 [2021-07-13 19:42:55,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:55,282 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 75 transitions. [2021-07-13 19:42:55,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:55,282 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 75 transitions. [2021-07-13 19:42:55,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:42:55,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:55,283 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:55,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-07-13 19:42:55,283 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:55,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:55,283 INFO L82 PathProgramCache]: Analyzing trace with hash -238616864, now seen corresponding path program 6 times [2021-07-13 19:42:55,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:55,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256161108] [2021-07-13 19:42:55,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:55,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:55,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:55,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:55,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256161108] [2021-07-13 19:42:55,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256161108] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:42:55,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:42:55,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:42:55,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686453962] [2021-07-13 19:42:55,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:42:55,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:55,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:42:55,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:42:55,308 INFO L87 Difference]: Start difference. First operand 39 states and 75 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:55,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:55,338 INFO L93 Difference]: Finished difference Result 43 states and 79 transitions. [2021-07-13 19:42:55,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:42:55,338 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:42:55,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:55,339 INFO L225 Difference]: With dead ends: 43 [2021-07-13 19:42:55,339 INFO L226 Difference]: Without dead ends: 39 [2021-07-13 19:42:55,339 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:42:55,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-07-13 19:42:55,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-07-13 19:42:55,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:55,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2021-07-13 19:42:55,340 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2021-07-13 19:42:55,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:55,341 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2021-07-13 19:42:55,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:55,341 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2021-07-13 19:42:55,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:42:55,341 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:55,341 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:55,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-07-13 19:42:55,341 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:55,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:55,342 INFO L82 PathProgramCache]: Analyzing trace with hash 319968626, now seen corresponding path program 1 times [2021-07-13 19:42:55,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:55,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843533584] [2021-07-13 19:42:55,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:55,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:55,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:55,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:55,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843533584] [2021-07-13 19:42:55,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843533584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:55,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469810353] [2021-07-13 19:42:55,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:55,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:55,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:42:55,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:55,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:55,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469810353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:55,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:55,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-13 19:42:55,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232792953] [2021-07-13 19:42:55,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:42:55,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:55,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:42:55,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:42:55,893 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:56,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:56,300 INFO L93 Difference]: Finished difference Result 78 states and 144 transitions. [2021-07-13 19:42:56,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:42:56,300 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:42:56,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:56,301 INFO L225 Difference]: With dead ends: 78 [2021-07-13 19:42:56,301 INFO L226 Difference]: Without dead ends: 71 [2021-07-13 19:42:56,301 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 487.4ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:56,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-07-13 19:42:56,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 49. [2021-07-13 19:42:56,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.9375) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:56,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 93 transitions. [2021-07-13 19:42:56,305 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 93 transitions. Word has length 14 [2021-07-13 19:42:56,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:56,305 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 93 transitions. [2021-07-13 19:42:56,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:56,305 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 93 transitions. [2021-07-13 19:42:56,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:42:56,305 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:56,305 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:56,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:56,513 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:56,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:56,513 INFO L82 PathProgramCache]: Analyzing trace with hash 851822386, now seen corresponding path program 2 times [2021-07-13 19:42:56,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:56,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957144813] [2021-07-13 19:42:56,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:56,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:56,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:56,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:56,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957144813] [2021-07-13 19:42:56,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957144813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:56,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103585203] [2021-07-13 19:42:56,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:56,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:56,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:56,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:42:56,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:56,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:56,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103585203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:56,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:56,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 19:42:56,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626146251] [2021-07-13 19:42:56,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:42:56,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:56,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:42:56,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:42:56,916 INFO L87 Difference]: Start difference. First operand 49 states and 93 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:57,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:57,188 INFO L93 Difference]: Finished difference Result 82 states and 152 transitions. [2021-07-13 19:42:57,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:42:57,189 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:42:57,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:57,189 INFO L225 Difference]: With dead ends: 82 [2021-07-13 19:42:57,189 INFO L226 Difference]: Without dead ends: 75 [2021-07-13 19:42:57,190 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 359.1ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:57,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-07-13 19:42:57,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 50. [2021-07-13 19:42:57,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.9591836734693877) internal successors, (96), 49 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:57,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 96 transitions. [2021-07-13 19:42:57,192 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 96 transitions. Word has length 14 [2021-07-13 19:42:57,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:57,192 INFO L482 AbstractCegarLoop]: Abstraction has 50 states and 96 transitions. [2021-07-13 19:42:57,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:57,192 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 96 transitions. [2021-07-13 19:42:57,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:42:57,192 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:57,192 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:57,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-13 19:42:57,405 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:57,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:57,405 INFO L82 PathProgramCache]: Analyzing trace with hash 151329398, now seen corresponding path program 3 times [2021-07-13 19:42:57,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:57,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454319409] [2021-07-13 19:42:57,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:57,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:57,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:57,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:57,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454319409] [2021-07-13 19:42:57,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454319409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:57,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757567422] [2021-07-13 19:42:57,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:57,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:42:57,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:57,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:42:57,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:57,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:57,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757567422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:57,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:57,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-13 19:42:57,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102283952] [2021-07-13 19:42:57,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:42:57,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:57,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:42:57,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:42:57,770 INFO L87 Difference]: Start difference. First operand 50 states and 96 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:58,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:58,086 INFO L93 Difference]: Finished difference Result 95 states and 173 transitions. [2021-07-13 19:42:58,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:58,086 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:42:58,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:58,087 INFO L225 Difference]: With dead ends: 95 [2021-07-13 19:42:58,087 INFO L226 Difference]: Without dead ends: 88 [2021-07-13 19:42:58,087 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 394.1ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:58,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-07-13 19:42:58,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 51. [2021-07-13 19:42:58,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.0) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:58,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 100 transitions. [2021-07-13 19:42:58,089 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 100 transitions. Word has length 14 [2021-07-13 19:42:58,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:58,089 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 100 transitions. [2021-07-13 19:42:58,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:58,090 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 100 transitions. [2021-07-13 19:42:58,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:42:58,090 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:58,090 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:58,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-13 19:42:58,311 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:58,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:58,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1842914034, now seen corresponding path program 4 times [2021-07-13 19:42:58,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:58,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384063631] [2021-07-13 19:42:58,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:58,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:58,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:58,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:58,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384063631] [2021-07-13 19:42:58,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384063631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:58,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42463277] [2021-07-13 19:42:58,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:58,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:42:58,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:58,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:42:58,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:58,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:58,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42463277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:58,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:58,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-13 19:42:58,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771654056] [2021-07-13 19:42:58,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:42:58,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:58,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:42:58,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:42:58,666 INFO L87 Difference]: Start difference. First operand 51 states and 100 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:58,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:58,981 INFO L93 Difference]: Finished difference Result 83 states and 155 transitions. [2021-07-13 19:42:58,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:58,981 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:42:58,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:58,982 INFO L225 Difference]: With dead ends: 83 [2021-07-13 19:42:58,982 INFO L226 Difference]: Without dead ends: 76 [2021-07-13 19:42:58,982 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 375.6ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:42:58,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-07-13 19:42:58,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 51. [2021-07-13 19:42:58,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.0) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:58,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 100 transitions. [2021-07-13 19:42:58,985 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 100 transitions. Word has length 14 [2021-07-13 19:42:58,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:58,985 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 100 transitions. [2021-07-13 19:42:58,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:58,985 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 100 transitions. [2021-07-13 19:42:58,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:42:58,986 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:58,986 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:59,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-13 19:42:59,193 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:59,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:59,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1869019580, now seen corresponding path program 5 times [2021-07-13 19:42:59,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:59,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723495211] [2021-07-13 19:42:59,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:59,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:59,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:59,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:59,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723495211] [2021-07-13 19:42:59,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723495211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:59,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599435913] [2021-07-13 19:42:59,392 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:59,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:59,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:59,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:42:59,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:59,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:59,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599435913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:59,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:59,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:42:59,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029572419] [2021-07-13 19:42:59,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:42:59,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:59,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:42:59,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:42:59,623 INFO L87 Difference]: Start difference. First operand 51 states and 100 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:59,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:59,909 INFO L93 Difference]: Finished difference Result 68 states and 129 transitions. [2021-07-13 19:42:59,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:42:59,909 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:42:59,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:59,910 INFO L225 Difference]: With dead ends: 68 [2021-07-13 19:42:59,910 INFO L226 Difference]: Without dead ends: 61 [2021-07-13 19:42:59,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 430.4ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:59,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-07-13 19:42:59,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2021-07-13 19:42:59,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.019230769230769) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:59,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 105 transitions. [2021-07-13 19:42:59,912 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 105 transitions. Word has length 14 [2021-07-13 19:42:59,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:59,912 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 105 transitions. [2021-07-13 19:42:59,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:59,913 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 105 transitions. [2021-07-13 19:42:59,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:42:59,913 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:59,913 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:00,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-13 19:43:00,121 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:00,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:00,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1725454728, now seen corresponding path program 6 times [2021-07-13 19:43:00,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:00,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493082814] [2021-07-13 19:43:00,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:00,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:00,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:00,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493082814] [2021-07-13 19:43:00,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493082814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:00,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104632827] [2021-07-13 19:43:00,325 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:00,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:43:00,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:00,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:43:00,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:00,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:00,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104632827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:00,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:00,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 19:43:00,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216737216] [2021-07-13 19:43:00,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:00,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:00,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:00,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:00,691 INFO L87 Difference]: Start difference. First operand 53 states and 105 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:00,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:00,849 INFO L93 Difference]: Finished difference Result 83 states and 153 transitions. [2021-07-13 19:43:00,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:43:00,849 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:43:00,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:00,850 INFO L225 Difference]: With dead ends: 83 [2021-07-13 19:43:00,850 INFO L226 Difference]: Without dead ends: 76 [2021-07-13 19:43:00,850 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 368.6ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:00,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-07-13 19:43:00,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2021-07-13 19:43:00,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:00,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 109 transitions. [2021-07-13 19:43:00,852 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 109 transitions. Word has length 14 [2021-07-13 19:43:00,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:00,852 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 109 transitions. [2021-07-13 19:43:00,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:00,853 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 109 transitions. [2021-07-13 19:43:00,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:43:00,853 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:00,853 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:01,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:01,065 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:01,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:01,065 INFO L82 PathProgramCache]: Analyzing trace with hash -877927932, now seen corresponding path program 7 times [2021-07-13 19:43:01,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:01,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205976066] [2021-07-13 19:43:01,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:01,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:01,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:01,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:01,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205976066] [2021-07-13 19:43:01,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205976066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:01,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612314452] [2021-07-13 19:43:01,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:01,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:43:01,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:01,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:01,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612314452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:01,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:01,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:43:01,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253615979] [2021-07-13 19:43:01,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:43:01,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:01,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:43:01,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:43:01,697 INFO L87 Difference]: Start difference. First operand 54 states and 109 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:02,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:02,045 INFO L93 Difference]: Finished difference Result 71 states and 135 transitions. [2021-07-13 19:43:02,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:43:02,046 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:43:02,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:02,046 INFO L225 Difference]: With dead ends: 71 [2021-07-13 19:43:02,046 INFO L226 Difference]: Without dead ends: 64 [2021-07-13 19:43:02,047 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 573.5ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:43:02,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-07-13 19:43:02,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2021-07-13 19:43:02,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.0) internal successors, (102), 51 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:02,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 102 transitions. [2021-07-13 19:43:02,049 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 102 transitions. Word has length 14 [2021-07-13 19:43:02,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:02,049 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 102 transitions. [2021-07-13 19:43:02,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:02,049 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 102 transitions. [2021-07-13 19:43:02,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:43:02,049 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:02,050 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:02,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-13 19:43:02,250 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:02,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:02,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1190224926, now seen corresponding path program 8 times [2021-07-13 19:43:02,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:02,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887875795] [2021-07-13 19:43:02,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:02,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:02,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:02,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:02,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887875795] [2021-07-13 19:43:02,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887875795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:02,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009280518] [2021-07-13 19:43:02,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:02,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:02,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:02,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:43:02,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:02,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:02,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009280518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:02,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:02,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 19:43:02,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238853863] [2021-07-13 19:43:02,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:02,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:02,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:02,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:02,981 INFO L87 Difference]: Start difference. First operand 52 states and 102 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:03,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:03,194 INFO L93 Difference]: Finished difference Result 79 states and 146 transitions. [2021-07-13 19:43:03,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:43:03,195 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:43:03,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:03,195 INFO L225 Difference]: With dead ends: 79 [2021-07-13 19:43:03,195 INFO L226 Difference]: Without dead ends: 72 [2021-07-13 19:43:03,195 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 376.0ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:03,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-07-13 19:43:03,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 54. [2021-07-13 19:43:03,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:03,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 109 transitions. [2021-07-13 19:43:03,197 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 109 transitions. Word has length 14 [2021-07-13 19:43:03,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:03,197 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 109 transitions. [2021-07-13 19:43:03,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:03,197 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 109 transitions. [2021-07-13 19:43:03,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:43:03,198 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:03,198 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:03,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-07-13 19:43:03,401 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:03,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:03,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1413157734, now seen corresponding path program 9 times [2021-07-13 19:43:03,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:03,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947051689] [2021-07-13 19:43:03,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:03,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:03,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:03,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:03,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947051689] [2021-07-13 19:43:03,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947051689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:03,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793343974] [2021-07-13 19:43:03,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:03,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:43:03,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:03,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:43:03,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:04,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:04,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793343974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:04,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:04,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 19:43:04,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321314292] [2021-07-13 19:43:04,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:04,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:04,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:04,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:04,260 INFO L87 Difference]: Start difference. First operand 54 states and 109 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:04,436 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-07-13 19:43:04,566 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-07-13 19:43:04,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:04,577 INFO L93 Difference]: Finished difference Result 81 states and 148 transitions. [2021-07-13 19:43:04,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:43:04,578 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:43:04,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:04,578 INFO L225 Difference]: With dead ends: 81 [2021-07-13 19:43:04,579 INFO L226 Difference]: Without dead ends: 74 [2021-07-13 19:43:04,579 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 495.0ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:04,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-07-13 19:43:04,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2021-07-13 19:43:04,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.019230769230769) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:04,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 105 transitions. [2021-07-13 19:43:04,581 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 105 transitions. Word has length 14 [2021-07-13 19:43:04,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:04,581 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 105 transitions. [2021-07-13 19:43:04,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:04,582 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 105 transitions. [2021-07-13 19:43:04,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:43:04,582 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:04,582 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:04,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-07-13 19:43:04,797 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:04,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:04,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1239910042, now seen corresponding path program 10 times [2021-07-13 19:43:04,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:04,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699040709] [2021-07-13 19:43:04,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:04,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:04,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:04,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:04,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699040709] [2021-07-13 19:43:04,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699040709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:04,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543601745] [2021-07-13 19:43:04,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:04,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:04,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:04,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:43:04,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:05,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:05,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543601745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:05,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:05,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:43:05,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499286455] [2021-07-13 19:43:05,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:43:05,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:05,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:43:05,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:43:05,378 INFO L87 Difference]: Start difference. First operand 53 states and 105 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:05,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:05,545 INFO L93 Difference]: Finished difference Result 66 states and 124 transitions. [2021-07-13 19:43:05,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:43:05,545 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:43:05,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:05,546 INFO L225 Difference]: With dead ends: 66 [2021-07-13 19:43:05,546 INFO L226 Difference]: Without dead ends: 59 [2021-07-13 19:43:05,546 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 322.1ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:05,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-07-13 19:43:05,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2021-07-13 19:43:05,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.0) internal successors, (108), 54 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:05,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 108 transitions. [2021-07-13 19:43:05,548 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 108 transitions. Word has length 14 [2021-07-13 19:43:05,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:05,548 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 108 transitions. [2021-07-13 19:43:05,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:05,549 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 108 transitions. [2021-07-13 19:43:05,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:43:05,549 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:05,549 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:05,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-07-13 19:43:05,757 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:05,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:05,757 INFO L82 PathProgramCache]: Analyzing trace with hash -100096846, now seen corresponding path program 11 times [2021-07-13 19:43:05,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:05,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211301380] [2021-07-13 19:43:05,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:05,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:05,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:05,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:05,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211301380] [2021-07-13 19:43:05,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211301380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:05,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161830225] [2021-07-13 19:43:05,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:05,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:05,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:05,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:43:05,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:06,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:06,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161830225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:06,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:06,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:43:06,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191927757] [2021-07-13 19:43:06,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:43:06,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:06,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:43:06,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:43:06,106 INFO L87 Difference]: Start difference. First operand 55 states and 108 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:06,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:06,388 INFO L93 Difference]: Finished difference Result 72 states and 137 transitions. [2021-07-13 19:43:06,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:43:06,389 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:43:06,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:06,389 INFO L225 Difference]: With dead ends: 72 [2021-07-13 19:43:06,390 INFO L226 Difference]: Without dead ends: 65 [2021-07-13 19:43:06,390 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 433.1ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:43:06,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-07-13 19:43:06,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2021-07-13 19:43:06,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:06,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 111 transitions. [2021-07-13 19:43:06,394 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 111 transitions. Word has length 14 [2021-07-13 19:43:06,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:06,394 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 111 transitions. [2021-07-13 19:43:06,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:06,394 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 111 transitions. [2021-07-13 19:43:06,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:43:06,395 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:06,395 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:06,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:06,609 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:06,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:06,609 INFO L82 PathProgramCache]: Analyzing trace with hash -800589834, now seen corresponding path program 12 times [2021-07-13 19:43:06,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:06,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212884056] [2021-07-13 19:43:06,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:06,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:06,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:06,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:06,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212884056] [2021-07-13 19:43:06,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212884056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:06,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23523872] [2021-07-13 19:43:06,818 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:06,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:43:06,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:06,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:43:06,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:07,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:07,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23523872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:07,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:07,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 19:43:07,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803963225] [2021-07-13 19:43:07,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:07,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:07,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:07,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:07,299 INFO L87 Difference]: Start difference. First operand 56 states and 111 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:07,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:07,470 INFO L93 Difference]: Finished difference Result 87 states and 161 transitions. [2021-07-13 19:43:07,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:43:07,470 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:43:07,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:07,471 INFO L225 Difference]: With dead ends: 87 [2021-07-13 19:43:07,471 INFO L226 Difference]: Without dead ends: 80 [2021-07-13 19:43:07,471 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 330.7ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:07,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-07-13 19:43:07,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2021-07-13 19:43:07,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0535714285714284) internal successors, (115), 56 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:07,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 115 transitions. [2021-07-13 19:43:07,472 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 115 transitions. Word has length 14 [2021-07-13 19:43:07,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:07,472 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 115 transitions. [2021-07-13 19:43:07,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:07,472 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 115 transitions. [2021-07-13 19:43:07,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:43:07,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:07,473 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:07,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-07-13 19:43:07,681 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:07,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:07,682 INFO L82 PathProgramCache]: Analyzing trace with hash 890994802, now seen corresponding path program 13 times [2021-07-13 19:43:07,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:07,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887191830] [2021-07-13 19:43:07,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:07,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:07,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:07,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887191830] [2021-07-13 19:43:07,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887191830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:07,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532159093] [2021-07-13 19:43:07,955 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:07,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:07,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:43:07,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:08,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:08,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532159093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:08,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:08,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:43:08,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488743268] [2021-07-13 19:43:08,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:43:08,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:08,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:43:08,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:43:08,252 INFO L87 Difference]: Start difference. First operand 57 states and 115 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:08,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:08,632 INFO L93 Difference]: Finished difference Result 75 states and 143 transitions. [2021-07-13 19:43:08,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:43:08,632 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:43:08,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:08,632 INFO L225 Difference]: With dead ends: 75 [2021-07-13 19:43:08,632 INFO L226 Difference]: Without dead ends: 68 [2021-07-13 19:43:08,633 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 666.1ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:43:08,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-07-13 19:43:08,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 55. [2021-07-13 19:43:08,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.0) internal successors, (108), 54 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:08,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 108 transitions. [2021-07-13 19:43:08,634 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 108 transitions. Word has length 14 [2021-07-13 19:43:08,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:08,634 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 108 transitions. [2021-07-13 19:43:08,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:08,635 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 108 transitions. [2021-07-13 19:43:08,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:43:08,635 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:08,635 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:08,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable578,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:08,841 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:08,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:08,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1335819636, now seen corresponding path program 14 times [2021-07-13 19:43:08,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:08,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702025600] [2021-07-13 19:43:08,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:08,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:09,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:09,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:09,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702025600] [2021-07-13 19:43:09,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702025600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:09,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29194959] [2021-07-13 19:43:09,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:09,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:09,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:09,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:43:09,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:09,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:09,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29194959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:09,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:09,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 19:43:09,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199905424] [2021-07-13 19:43:09,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:09,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:09,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:09,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:09,412 INFO L87 Difference]: Start difference. First operand 55 states and 108 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:09,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:09,642 INFO L93 Difference]: Finished difference Result 83 states and 154 transitions. [2021-07-13 19:43:09,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:43:09,642 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:43:09,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:09,643 INFO L225 Difference]: With dead ends: 83 [2021-07-13 19:43:09,643 INFO L226 Difference]: Without dead ends: 76 [2021-07-13 19:43:09,643 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 498.6ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:09,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-07-13 19:43:09,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 57. [2021-07-13 19:43:09,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0535714285714284) internal successors, (115), 56 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:09,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 115 transitions. [2021-07-13 19:43:09,645 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 115 transitions. Word has length 14 [2021-07-13 19:43:09,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:09,645 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 115 transitions. [2021-07-13 19:43:09,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:09,645 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 115 transitions. [2021-07-13 19:43:09,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:43:09,645 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:09,646 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:09,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:09,857 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:09,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:09,857 INFO L82 PathProgramCache]: Analyzing trace with hash 355765000, now seen corresponding path program 15 times [2021-07-13 19:43:09,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:09,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928521010] [2021-07-13 19:43:09,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:09,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:10,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:10,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:10,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928521010] [2021-07-13 19:43:10,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928521010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:10,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767372768] [2021-07-13 19:43:10,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:10,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:43:10,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:10,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:43:10,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:10,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:10,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767372768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:10,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:10,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 19:43:10,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939203714] [2021-07-13 19:43:10,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:10,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:10,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:10,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:10,395 INFO L87 Difference]: Start difference. First operand 57 states and 115 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:10,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:10,671 INFO L93 Difference]: Finished difference Result 85 states and 156 transitions. [2021-07-13 19:43:10,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:43:10,672 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:43:10,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:10,672 INFO L225 Difference]: With dead ends: 85 [2021-07-13 19:43:10,672 INFO L226 Difference]: Without dead ends: 78 [2021-07-13 19:43:10,673 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 489.2ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:10,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-07-13 19:43:10,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 56. [2021-07-13 19:43:10,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:10,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 111 transitions. [2021-07-13 19:43:10,675 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 111 transitions. Word has length 14 [2021-07-13 19:43:10,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:10,675 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 111 transitions. [2021-07-13 19:43:10,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:10,675 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 111 transitions. [2021-07-13 19:43:10,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:43:10,675 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:10,675 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:10,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable629,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:10,889 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:10,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:10,889 INFO L82 PathProgramCache]: Analyzing trace with hash 529012692, now seen corresponding path program 16 times [2021-07-13 19:43:10,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:10,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489420938] [2021-07-13 19:43:10,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:10,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:11,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:11,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:11,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489420938] [2021-07-13 19:43:11,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489420938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:11,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336607228] [2021-07-13 19:43:11,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:11,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:11,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:11,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:43:11,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:11,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:11,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336607228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:11,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:11,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:43:11,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589405373] [2021-07-13 19:43:11,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:43:11,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:11,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:43:11,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:43:11,381 INFO L87 Difference]: Start difference. First operand 56 states and 111 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:11,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:11,576 INFO L93 Difference]: Finished difference Result 70 states and 132 transitions. [2021-07-13 19:43:11,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:43:11,576 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:43:11,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:11,577 INFO L225 Difference]: With dead ends: 70 [2021-07-13 19:43:11,577 INFO L226 Difference]: Without dead ends: 63 [2021-07-13 19:43:11,577 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 386.3ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:11,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-07-13 19:43:11,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2021-07-13 19:43:11,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.0) internal successors, (106), 53 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:11,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 106 transitions. [2021-07-13 19:43:11,579 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 106 transitions. Word has length 14 [2021-07-13 19:43:11,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:11,579 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 106 transitions. [2021-07-13 19:43:11,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:11,579 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 106 transitions. [2021-07-13 19:43:11,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:43:11,579 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:11,579 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:11,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable669,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:11,793 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:11,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:11,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1254420580, now seen corresponding path program 17 times [2021-07-13 19:43:11,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:11,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2997930] [2021-07-13 19:43:11,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:11,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:11,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:11,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2997930] [2021-07-13 19:43:11,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2997930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:11,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249240292] [2021-07-13 19:43:11,987 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:12,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:43:12,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:12,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:43:12,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:12,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:12,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249240292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:12,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:12,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 19:43:12,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124851482] [2021-07-13 19:43:12,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:43:12,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:12,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:43:12,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:43:12,131 INFO L87 Difference]: Start difference. First operand 54 states and 106 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:12,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:12,509 INFO L93 Difference]: Finished difference Result 103 states and 190 transitions. [2021-07-13 19:43:12,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:12,510 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:43:12,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:12,510 INFO L225 Difference]: With dead ends: 103 [2021-07-13 19:43:12,510 INFO L226 Difference]: Without dead ends: 96 [2021-07-13 19:43:12,510 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 498.2ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:43:12,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-07-13 19:43:12,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 57. [2021-07-13 19:43:12,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:12,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 116 transitions. [2021-07-13 19:43:12,512 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 116 transitions. Word has length 14 [2021-07-13 19:43:12,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:12,513 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 116 transitions. [2021-07-13 19:43:12,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:12,513 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 116 transitions. [2021-07-13 19:43:12,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:43:12,513 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:12,513 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:12,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable696 [2021-07-13 19:43:12,717 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:12,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:12,717 INFO L82 PathProgramCache]: Analyzing trace with hash 437164056, now seen corresponding path program 18 times [2021-07-13 19:43:12,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:12,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579215242] [2021-07-13 19:43:12,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:12,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:12,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:12,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:12,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579215242] [2021-07-13 19:43:12,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579215242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:12,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832333238] [2021-07-13 19:43:12,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:12,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:43:12,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:12,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:43:12,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:13,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:13,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832333238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:13,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:13,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:43:13,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439474831] [2021-07-13 19:43:13,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:43:13,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:13,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:43:13,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:43:13,224 INFO L87 Difference]: Start difference. First operand 57 states and 116 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:13,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:13,580 INFO L93 Difference]: Finished difference Result 105 states and 192 transitions. [2021-07-13 19:43:13,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:13,580 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:43:13,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:13,581 INFO L225 Difference]: With dead ends: 105 [2021-07-13 19:43:13,581 INFO L226 Difference]: Without dead ends: 98 [2021-07-13 19:43:13,581 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 532.3ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:43:13,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-07-13 19:43:13,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 56. [2021-07-13 19:43:13,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.036363636363636) internal successors, (112), 55 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:13,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 112 transitions. [2021-07-13 19:43:13,583 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 112 transitions. Word has length 14 [2021-07-13 19:43:13,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:13,583 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 112 transitions. [2021-07-13 19:43:13,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:13,583 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 112 transitions. [2021-07-13 19:43:13,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:43:13,584 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:13,584 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:13,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable703,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:13,789 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:13,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:13,789 INFO L82 PathProgramCache]: Analyzing trace with hash 610411748, now seen corresponding path program 19 times [2021-07-13 19:43:13,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:13,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714476526] [2021-07-13 19:43:13,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:13,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:14,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:14,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714476526] [2021-07-13 19:43:14,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714476526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:14,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94355759] [2021-07-13 19:43:14,037 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:14,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:14,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:43:14,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:14,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:14,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94355759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:14,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:14,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 19:43:14,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970815689] [2021-07-13 19:43:14,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:14,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:14,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:14,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:14,448 INFO L87 Difference]: Start difference. First operand 56 states and 112 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:14,746 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2021-07-13 19:43:14,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:14,902 INFO L93 Difference]: Finished difference Result 91 states and 169 transitions. [2021-07-13 19:43:14,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:43:14,902 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:43:14,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:14,903 INFO L225 Difference]: With dead ends: 91 [2021-07-13 19:43:14,903 INFO L226 Difference]: Without dead ends: 84 [2021-07-13 19:43:14,903 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 725.8ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:14,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-07-13 19:43:14,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 55. [2021-07-13 19:43:14,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 54 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:14,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 109 transitions. [2021-07-13 19:43:14,905 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 109 transitions. Word has length 14 [2021-07-13 19:43:14,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:14,905 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 109 transitions. [2021-07-13 19:43:14,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:14,906 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 109 transitions. [2021-07-13 19:43:14,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:43:14,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:14,906 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:15,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable729,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:15,117 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:15,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:15,117 INFO L82 PathProgramCache]: Analyzing trace with hash -2070988814, now seen corresponding path program 20 times [2021-07-13 19:43:15,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:15,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030516568] [2021-07-13 19:43:15,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:15,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:15,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:15,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030516568] [2021-07-13 19:43:15,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030516568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:15,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601724493] [2021-07-13 19:43:15,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:15,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:15,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:15,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:43:15,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:15,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:15,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601724493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:15,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:15,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 19:43:15,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589696153] [2021-07-13 19:43:15,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:43:15,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:15,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:43:15,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:43:15,520 INFO L87 Difference]: Start difference. First operand 55 states and 109 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:15,829 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-07-13 19:43:16,005 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-07-13 19:43:16,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:16,020 INFO L93 Difference]: Finished difference Result 88 states and 163 transitions. [2021-07-13 19:43:16,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:43:16,020 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:43:16,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:16,021 INFO L225 Difference]: With dead ends: 88 [2021-07-13 19:43:16,021 INFO L226 Difference]: Without dead ends: 81 [2021-07-13 19:43:16,021 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 668.7ms TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:16,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-07-13 19:43:16,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 57. [2021-07-13 19:43:16,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:16,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 112 transitions. [2021-07-13 19:43:16,023 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 112 transitions. Word has length 14 [2021-07-13 19:43:16,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:16,023 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 112 transitions. [2021-07-13 19:43:16,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:16,023 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 112 transitions. [2021-07-13 19:43:16,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:16,023 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:16,023 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:16,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable765 [2021-07-13 19:43:16,233 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:16,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:16,233 INFO L82 PathProgramCache]: Analyzing trace with hash 492372682, now seen corresponding path program 21 times [2021-07-13 19:43:16,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:16,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624791824] [2021-07-13 19:43:16,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:16,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:16,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624791824] [2021-07-13 19:43:16,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624791824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:16,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079965349] [2021-07-13 19:43:16,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:16,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:43:16,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:16,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:16,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:16,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:16,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079965349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:16,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:16,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:43:16,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39657621] [2021-07-13 19:43:16,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:43:16,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:16,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:43:16,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:43:16,462 INFO L87 Difference]: Start difference. First operand 57 states and 112 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:16,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:16,668 INFO L93 Difference]: Finished difference Result 83 states and 154 transitions. [2021-07-13 19:43:16,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:43:16,668 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:16,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:16,668 INFO L225 Difference]: With dead ends: 83 [2021-07-13 19:43:16,668 INFO L226 Difference]: Without dead ends: 72 [2021-07-13 19:43:16,669 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 248.4ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:43:16,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-07-13 19:43:16,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 52. [2021-07-13 19:43:16,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.0) internal successors, (102), 51 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:16,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 102 transitions. [2021-07-13 19:43:16,670 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 102 transitions. Word has length 15 [2021-07-13 19:43:16,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:16,670 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 102 transitions. [2021-07-13 19:43:16,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:16,670 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 102 transitions. [2021-07-13 19:43:16,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:16,671 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:16,671 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:16,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable779,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:16,881 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:16,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:16,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1563887655, now seen corresponding path program 22 times [2021-07-13 19:43:16,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:16,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601878782] [2021-07-13 19:43:16,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:16,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:16,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:16,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:16,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601878782] [2021-07-13 19:43:16,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601878782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:16,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221608740] [2021-07-13 19:43:16,942 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:16,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:16,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:16,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:16,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:17,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:17,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221608740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:17,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:17,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:43:17,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737077810] [2021-07-13 19:43:17,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:43:17,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:17,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:43:17,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:43:17,065 INFO L87 Difference]: Start difference. First operand 52 states and 102 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:17,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:17,226 INFO L93 Difference]: Finished difference Result 80 states and 153 transitions. [2021-07-13 19:43:17,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:43:17,227 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:17,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:17,227 INFO L225 Difference]: With dead ends: 80 [2021-07-13 19:43:17,227 INFO L226 Difference]: Without dead ends: 80 [2021-07-13 19:43:17,227 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 190.8ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:17,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-07-13 19:43:17,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 53. [2021-07-13 19:43:17,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.019230769230769) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:17,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 105 transitions. [2021-07-13 19:43:17,229 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 105 transitions. Word has length 15 [2021-07-13 19:43:17,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:17,229 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 105 transitions. [2021-07-13 19:43:17,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:17,230 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 105 transitions. [2021-07-13 19:43:17,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:17,230 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:17,230 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:17,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable786 [2021-07-13 19:43:17,437 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:17,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:17,437 INFO L82 PathProgramCache]: Analyzing trace with hash -200029942, now seen corresponding path program 23 times [2021-07-13 19:43:17,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:17,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554676234] [2021-07-13 19:43:17,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:17,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:17,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:17,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:17,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554676234] [2021-07-13 19:43:17,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554676234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:17,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791866344] [2021-07-13 19:43:17,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:17,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:17,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:17,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:17,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:17,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:17,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791866344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:17,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:17,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 19:43:17,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514300441] [2021-07-13 19:43:17,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:43:17,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:17,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:43:17,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:43:17,644 INFO L87 Difference]: Start difference. First operand 53 states and 105 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:17,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:17,813 INFO L93 Difference]: Finished difference Result 84 states and 157 transitions. [2021-07-13 19:43:17,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:43:17,813 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:17,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:17,818 INFO L225 Difference]: With dead ends: 84 [2021-07-13 19:43:17,818 INFO L226 Difference]: Without dead ends: 78 [2021-07-13 19:43:17,818 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 203.8ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:17,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-07-13 19:43:17,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2021-07-13 19:43:17,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.018867924528302) internal successors, (107), 53 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:17,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 107 transitions. [2021-07-13 19:43:17,825 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 107 transitions. Word has length 15 [2021-07-13 19:43:17,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:17,825 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 107 transitions. [2021-07-13 19:43:17,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:17,825 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 107 transitions. [2021-07-13 19:43:17,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:17,826 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:17,826 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:18,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable789 [2021-07-13 19:43:18,043 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:18,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:18,044 INFO L82 PathProgramCache]: Analyzing trace with hash 542091435, now seen corresponding path program 24 times [2021-07-13 19:43:18,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:18,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554752833] [2021-07-13 19:43:18,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:18,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:18,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:18,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:18,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554752833] [2021-07-13 19:43:18,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554752833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:18,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062939840] [2021-07-13 19:43:18,113 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:18,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:43:18,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:18,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:18,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:18,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:18,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:18,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:43:18,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:18,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:18,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:43:18,280 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:18,302 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:43:18,302 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:43:18,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:43:18,303 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:43:18,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:18,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062939840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:18,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:18,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:43:18,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053014424] [2021-07-13 19:43:18,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:18,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:18,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:18,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:18,324 INFO L87 Difference]: Start difference. First operand 54 states and 107 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:18,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:18,418 INFO L93 Difference]: Finished difference Result 75 states and 147 transitions. [2021-07-13 19:43:18,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:43:18,418 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:18,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:18,418 INFO L225 Difference]: With dead ends: 75 [2021-07-13 19:43:18,419 INFO L226 Difference]: Without dead ends: 75 [2021-07-13 19:43:18,419 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 144.5ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:18,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-07-13 19:43:18,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2021-07-13 19:43:18,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.018867924528302) internal successors, (107), 53 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:18,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 107 transitions. [2021-07-13 19:43:18,421 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 107 transitions. Word has length 15 [2021-07-13 19:43:18,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:18,421 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 107 transitions. [2021-07-13 19:43:18,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:18,421 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 107 transitions. [2021-07-13 19:43:18,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:18,421 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:18,422 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:18,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable794 [2021-07-13 19:43:18,629 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:18,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:18,629 INFO L82 PathProgramCache]: Analyzing trace with hash -440476090, now seen corresponding path program 25 times [2021-07-13 19:43:18,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:18,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869360455] [2021-07-13 19:43:18,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:18,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:18,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:18,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:18,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869360455] [2021-07-13 19:43:18,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869360455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:18,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657645825] [2021-07-13 19:43:18,699 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:18,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:18,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:18,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:18,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:18,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:18,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:43:18,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:18,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:43:18,898 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:18,940 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-07-13 19:43:18,940 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:43:18,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:43:18,944 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:18,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:18,961 INFO L518 ElimStorePlain]: Eliminatee v_prenex_24 vanished before elimination [2021-07-13 19:43:18,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:43:18,962 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:43:19,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:19,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657645825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:19,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:19,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:43:19,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106498989] [2021-07-13 19:43:19,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:19,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:19,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:19,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:19,035 INFO L87 Difference]: Start difference. First operand 54 states and 107 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:19,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:19,626 INFO L93 Difference]: Finished difference Result 105 states and 194 transitions. [2021-07-13 19:43:19,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:43:19,626 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:19,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:19,627 INFO L225 Difference]: With dead ends: 105 [2021-07-13 19:43:19,627 INFO L226 Difference]: Without dead ends: 102 [2021-07-13 19:43:19,627 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 581.3ms TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:43:19,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-07-13 19:43:19,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 59. [2021-07-13 19:43:19,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0517241379310347) internal successors, (119), 58 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:19,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 119 transitions. [2021-07-13 19:43:19,629 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 119 transitions. Word has length 15 [2021-07-13 19:43:19,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:19,629 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 119 transitions. [2021-07-13 19:43:19,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:19,630 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 119 transitions. [2021-07-13 19:43:19,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:19,630 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:19,630 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:19,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable798,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:19,852 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:19,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:19,852 INFO L82 PathProgramCache]: Analyzing trace with hash -693631355, now seen corresponding path program 26 times [2021-07-13 19:43:19,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:19,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251634619] [2021-07-13 19:43:19,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:19,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:19,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:19,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:19,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251634619] [2021-07-13 19:43:19,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251634619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:19,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164021289] [2021-07-13 19:43:19,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:19,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:19,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:19,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:19,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:20,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:20,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:20,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:43:20,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:20,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:20,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:43:20,050 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:20,074 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:43:20,074 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:43:20,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:43:20,075 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:43:20,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:20,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164021289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:20,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:20,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:43:20,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758604916] [2021-07-13 19:43:20,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:20,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:20,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:20,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:20,115 INFO L87 Difference]: Start difference. First operand 59 states and 119 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:20,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:20,322 INFO L93 Difference]: Finished difference Result 98 states and 187 transitions. [2021-07-13 19:43:20,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:20,323 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:20,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:20,323 INFO L225 Difference]: With dead ends: 98 [2021-07-13 19:43:20,323 INFO L226 Difference]: Without dead ends: 98 [2021-07-13 19:43:20,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 248.0ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:43:20,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-07-13 19:43:20,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 59. [2021-07-13 19:43:20,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0517241379310347) internal successors, (119), 58 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:20,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 119 transitions. [2021-07-13 19:43:20,326 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 119 transitions. Word has length 15 [2021-07-13 19:43:20,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:20,326 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 119 transitions. [2021-07-13 19:43:20,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:20,326 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 119 transitions. [2021-07-13 19:43:20,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:20,326 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:20,326 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:20,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable817,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:20,548 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:20,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:20,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1140969078, now seen corresponding path program 27 times [2021-07-13 19:43:20,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:20,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082906380] [2021-07-13 19:43:20,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:20,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:20,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:20,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:20,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082906380] [2021-07-13 19:43:20,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082906380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:20,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9732657] [2021-07-13 19:43:20,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:20,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:43:20,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:20,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:20,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:20,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:20,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:20,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:43:20,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:20,797 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:20,797 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:20,837 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-07-13 19:43:20,837 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:43:20,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:43:20,841 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:20,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:20,858 INFO L518 ElimStorePlain]: Eliminatee v_prenex_28 vanished before elimination [2021-07-13 19:43:20,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:43:20,859 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:43:20,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:20,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9732657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:20,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:20,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:43:20,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166215198] [2021-07-13 19:43:20,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:20,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:20,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:20,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:20,918 INFO L87 Difference]: Start difference. First operand 59 states and 119 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:21,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:21,173 INFO L93 Difference]: Finished difference Result 90 states and 173 transitions. [2021-07-13 19:43:21,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:21,175 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:21,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:21,175 INFO L225 Difference]: With dead ends: 90 [2021-07-13 19:43:21,175 INFO L226 Difference]: Without dead ends: 90 [2021-07-13 19:43:21,176 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 293.3ms TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:43:21,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-07-13 19:43:21,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 55. [2021-07-13 19:43:21,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:21,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 110 transitions. [2021-07-13 19:43:21,178 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 110 transitions. Word has length 15 [2021-07-13 19:43:21,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:21,178 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 110 transitions. [2021-07-13 19:43:21,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:21,178 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 110 transitions. [2021-07-13 19:43:21,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:21,179 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:21,179 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:21,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable827,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:21,385 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:21,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:21,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1171200973, now seen corresponding path program 28 times [2021-07-13 19:43:21,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:21,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518940098] [2021-07-13 19:43:21,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:21,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:21,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:21,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:21,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518940098] [2021-07-13 19:43:21,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518940098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:21,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737314993] [2021-07-13 19:43:21,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:21,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:21,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:21,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:21,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:21,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:21,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:21,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:43:21,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:21,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:21,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:43:21,588 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:21,614 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:43:21,615 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:43:21,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:43:21,616 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:43:21,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:21,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737314993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:21,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:21,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:43:21,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378137900] [2021-07-13 19:43:21,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:21,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:21,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:21,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:21,675 INFO L87 Difference]: Start difference. First operand 55 states and 110 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:21,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:21,916 INFO L93 Difference]: Finished difference Result 72 states and 140 transitions. [2021-07-13 19:43:21,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:43:21,916 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:21,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:21,917 INFO L225 Difference]: With dead ends: 72 [2021-07-13 19:43:21,917 INFO L226 Difference]: Without dead ends: 70 [2021-07-13 19:43:21,917 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 302.3ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:21,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-07-13 19:43:21,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 55. [2021-07-13 19:43:21,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 54 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:21,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 109 transitions. [2021-07-13 19:43:21,919 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 109 transitions. Word has length 15 [2021-07-13 19:43:21,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:21,919 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 109 transitions. [2021-07-13 19:43:21,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:21,919 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 109 transitions. [2021-07-13 19:43:21,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:21,919 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:21,919 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:22,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable844 [2021-07-13 19:43:22,120 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:22,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:22,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1353215032, now seen corresponding path program 29 times [2021-07-13 19:43:22,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:22,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723508697] [2021-07-13 19:43:22,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:22,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:22,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:22,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:22,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723508697] [2021-07-13 19:43:22,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723508697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:22,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100040755] [2021-07-13 19:43:22,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:22,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:22,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:22,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:22,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:22,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:22,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100040755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:22,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:22,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 19:43:22,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055032182] [2021-07-13 19:43:22,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:43:22,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:22,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:43:22,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:43:22,272 INFO L87 Difference]: Start difference. First operand 55 states and 109 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:22,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:22,415 INFO L93 Difference]: Finished difference Result 69 states and 133 transitions. [2021-07-13 19:43:22,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:43:22,416 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:22,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:22,416 INFO L225 Difference]: With dead ends: 69 [2021-07-13 19:43:22,416 INFO L226 Difference]: Without dead ends: 63 [2021-07-13 19:43:22,416 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 170.3ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:22,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-07-13 19:43:22,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2021-07-13 19:43:22,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.017857142857143) internal successors, (113), 56 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:22,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 113 transitions. [2021-07-13 19:43:22,418 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 113 transitions. Word has length 15 [2021-07-13 19:43:22,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:22,418 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 113 transitions. [2021-07-13 19:43:22,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:22,418 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 113 transitions. [2021-07-13 19:43:22,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:22,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:22,418 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:22,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable857 [2021-07-13 19:43:22,619 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:22,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:22,619 INFO L82 PathProgramCache]: Analyzing trace with hash 2095336409, now seen corresponding path program 30 times [2021-07-13 19:43:22,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:22,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810610232] [2021-07-13 19:43:22,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:22,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:22,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:22,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:22,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810610232] [2021-07-13 19:43:22,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810610232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:22,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216600798] [2021-07-13 19:43:22,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:22,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:43:22,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:22,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:22,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:22,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:22,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:22,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:43:22,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:22,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:22,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:43:22,821 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:22,846 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:43:22,847 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:43:22,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:43:22,848 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:43:22,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:22,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216600798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:22,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:22,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:43:22,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324577717] [2021-07-13 19:43:22,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:22,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:22,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:22,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:22,867 INFO L87 Difference]: Start difference. First operand 57 states and 113 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:22,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:22,982 INFO L93 Difference]: Finished difference Result 68 states and 135 transitions. [2021-07-13 19:43:22,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:43:22,989 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:22,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:22,990 INFO L225 Difference]: With dead ends: 68 [2021-07-13 19:43:22,990 INFO L226 Difference]: Without dead ends: 68 [2021-07-13 19:43:22,990 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 152.6ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:22,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-07-13 19:43:22,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2021-07-13 19:43:22,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.017857142857143) internal successors, (113), 56 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:22,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 113 transitions. [2021-07-13 19:43:22,992 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 113 transitions. Word has length 15 [2021-07-13 19:43:22,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:22,992 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 113 transitions. [2021-07-13 19:43:22,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:22,992 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 113 transitions. [2021-07-13 19:43:22,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:22,992 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:22,992 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:23,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable862 [2021-07-13 19:43:23,200 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:23,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:23,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1112768884, now seen corresponding path program 31 times [2021-07-13 19:43:23,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:23,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283570426] [2021-07-13 19:43:23,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:23,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:23,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:23,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:23,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283570426] [2021-07-13 19:43:23,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283570426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:23,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464157429] [2021-07-13 19:43:23,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:23,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:23,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:23,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:23,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:23,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:23,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:43:23,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:23,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:43:23,415 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:23,462 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-07-13 19:43:23,462 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:43:23,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:43:23,466 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:23,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:23,485 INFO L518 ElimStorePlain]: Eliminatee v_prenex_30 vanished before elimination [2021-07-13 19:43:23,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:43:23,487 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:43:23,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:23,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464157429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:23,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:23,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:43:23,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853939268] [2021-07-13 19:43:23,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:23,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:23,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:23,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:23,557 INFO L87 Difference]: Start difference. First operand 57 states and 113 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:23,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:23,902 INFO L93 Difference]: Finished difference Result 87 states and 164 transitions. [2021-07-13 19:43:23,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:43:23,902 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:23,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:23,903 INFO L225 Difference]: With dead ends: 87 [2021-07-13 19:43:23,903 INFO L226 Difference]: Without dead ends: 84 [2021-07-13 19:43:23,903 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 366.8ms TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:43:23,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-07-13 19:43:23,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 62. [2021-07-13 19:43:23,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:23,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 125 transitions. [2021-07-13 19:43:23,905 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 125 transitions. Word has length 15 [2021-07-13 19:43:23,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:23,905 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 125 transitions. [2021-07-13 19:43:23,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:23,905 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 125 transitions. [2021-07-13 19:43:23,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:23,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:23,906 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:24,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable866 [2021-07-13 19:43:24,113 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:24,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:24,113 INFO L82 PathProgramCache]: Analyzing trace with hash 859613619, now seen corresponding path program 32 times [2021-07-13 19:43:24,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:24,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243143299] [2021-07-13 19:43:24,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:24,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:24,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:24,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243143299] [2021-07-13 19:43:24,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243143299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:24,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672260236] [2021-07-13 19:43:24,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:24,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:24,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:24,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:24,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:24,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:24,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:24,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:43:24,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:24,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:24,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:43:24,324 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:24,358 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:43:24,358 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:43:24,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:43:24,359 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:43:24,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:24,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672260236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:24,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:24,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:43:24,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606532511] [2021-07-13 19:43:24,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:24,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:24,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:24,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:24,409 INFO L87 Difference]: Start difference. First operand 62 states and 125 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:24,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:24,560 INFO L93 Difference]: Finished difference Result 94 states and 181 transitions. [2021-07-13 19:43:24,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:43:24,560 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:24,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:24,561 INFO L225 Difference]: With dead ends: 94 [2021-07-13 19:43:24,561 INFO L226 Difference]: Without dead ends: 94 [2021-07-13 19:43:24,561 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 202.2ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:24,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-07-13 19:43:24,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 62. [2021-07-13 19:43:24,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:24,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 125 transitions. [2021-07-13 19:43:24,563 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 125 transitions. Word has length 15 [2021-07-13 19:43:24,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:24,563 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 125 transitions. [2021-07-13 19:43:24,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:24,563 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 125 transitions. [2021-07-13 19:43:24,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:24,563 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:24,563 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:24,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable885,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:24,769 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:24,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:24,769 INFO L82 PathProgramCache]: Analyzing trace with hash 412275896, now seen corresponding path program 33 times [2021-07-13 19:43:24,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:24,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483041821] [2021-07-13 19:43:24,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:24,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:24,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:24,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:24,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483041821] [2021-07-13 19:43:24,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483041821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:24,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644712129] [2021-07-13 19:43:24,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:24,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:43:24,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:24,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:24,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:24,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:24,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:24,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:43:24,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:24,979 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:24,980 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:25,023 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-07-13 19:43:25,023 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:43:25,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:43:25,027 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:25,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:25,046 INFO L518 ElimStorePlain]: Eliminatee v_prenex_33 vanished before elimination [2021-07-13 19:43:25,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:43:25,048 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:43:25,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:25,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644712129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:25,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:25,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:43:25,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102817282] [2021-07-13 19:43:25,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:25,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:25,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:25,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:25,109 INFO L87 Difference]: Start difference. First operand 62 states and 125 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:25,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:25,261 INFO L93 Difference]: Finished difference Result 72 states and 143 transitions. [2021-07-13 19:43:25,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:25,261 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:25,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:25,262 INFO L225 Difference]: With dead ends: 72 [2021-07-13 19:43:25,262 INFO L226 Difference]: Without dead ends: 72 [2021-07-13 19:43:25,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 197.9ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:25,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-07-13 19:43:25,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2021-07-13 19:43:25,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 57 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:25,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 116 transitions. [2021-07-13 19:43:25,264 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 116 transitions. Word has length 15 [2021-07-13 19:43:25,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:25,264 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 116 transitions. [2021-07-13 19:43:25,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:25,264 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 116 transitions. [2021-07-13 19:43:25,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:25,264 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:25,264 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:25,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable895 [2021-07-13 19:43:25,465 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:25,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:25,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1570521349, now seen corresponding path program 34 times [2021-07-13 19:43:25,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:25,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443520293] [2021-07-13 19:43:25,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:25,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:25,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:25,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:25,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443520293] [2021-07-13 19:43:25,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443520293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:25,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347512548] [2021-07-13 19:43:25,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:25,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:25,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:25,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:25,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:25,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:25,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:43:25,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:25,690 INFO L628 ElimStorePlain]: treesize reduction 49, result has 34.7 percent of original size [2021-07-13 19:43:25,691 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:43:25,691 INFO L518 ElimStorePlain]: Eliminatee v_prenex_36 vanished before elimination [2021-07-13 19:43:25,691 INFO L518 ElimStorePlain]: Eliminatee v_prenex_37 vanished before elimination [2021-07-13 19:43:25,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:43:25,692 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:82, output treesize:18 [2021-07-13 19:43:25,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:25,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347512548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:25,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:25,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:43:25,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425013996] [2021-07-13 19:43:25,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:25,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:25,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:25,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:25,751 INFO L87 Difference]: Start difference. First operand 58 states and 116 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:25,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:25,889 INFO L93 Difference]: Finished difference Result 71 states and 139 transitions. [2021-07-13 19:43:25,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:25,889 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:25,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:25,889 INFO L225 Difference]: With dead ends: 71 [2021-07-13 19:43:25,889 INFO L226 Difference]: Without dead ends: 69 [2021-07-13 19:43:25,890 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 186.9ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:25,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-07-13 19:43:25,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 56. [2021-07-13 19:43:25,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:25,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 111 transitions. [2021-07-13 19:43:25,891 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 111 transitions. Word has length 15 [2021-07-13 19:43:25,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:25,891 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 111 transitions. [2021-07-13 19:43:25,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:25,891 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 111 transitions. [2021-07-13 19:43:25,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:25,892 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:25,892 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:26,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable906,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:26,105 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:26,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:26,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1700514206, now seen corresponding path program 35 times [2021-07-13 19:43:26,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:26,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117528969] [2021-07-13 19:43:26,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:26,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:26,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:26,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:26,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117528969] [2021-07-13 19:43:26,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117528969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:26,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369165591] [2021-07-13 19:43:26,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:26,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:43:26,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:26,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:26,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:26,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:26,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369165591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:26,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:26,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 19:43:26,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972665589] [2021-07-13 19:43:26,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:43:26,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:26,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:43:26,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:43:26,281 INFO L87 Difference]: Start difference. First operand 56 states and 111 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:26,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:26,484 INFO L93 Difference]: Finished difference Result 86 states and 162 transitions. [2021-07-13 19:43:26,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:43:26,485 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:26,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:26,485 INFO L225 Difference]: With dead ends: 86 [2021-07-13 19:43:26,485 INFO L226 Difference]: Without dead ends: 83 [2021-07-13 19:43:26,485 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 222.4ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:43:26,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-07-13 19:43:26,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 63. [2021-07-13 19:43:26,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 62 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:26,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 129 transitions. [2021-07-13 19:43:26,487 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 129 transitions. Word has length 15 [2021-07-13 19:43:26,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:26,487 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 129 transitions. [2021-07-13 19:43:26,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:26,487 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 129 transitions. [2021-07-13 19:43:26,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:26,487 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:26,487 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:26,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable923,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:26,688 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:26,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:26,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1447358941, now seen corresponding path program 36 times [2021-07-13 19:43:26,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:26,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857638112] [2021-07-13 19:43:26,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:26,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:26,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:26,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:26,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857638112] [2021-07-13 19:43:26,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857638112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:26,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921366424] [2021-07-13 19:43:26,753 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:26,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:43:26,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:26,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:26,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:26,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:26,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:26,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:43:26,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:26,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:26,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:43:26,889 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:26,927 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:43:26,927 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:43:26,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:43:26,928 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:43:26,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:26,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921366424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:26,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:26,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:43:26,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078035433] [2021-07-13 19:43:26,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:26,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:26,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:26,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:26,975 INFO L87 Difference]: Start difference. First operand 63 states and 129 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:27,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:27,063 INFO L93 Difference]: Finished difference Result 90 states and 174 transitions. [2021-07-13 19:43:27,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:43:27,067 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:27,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:27,067 INFO L225 Difference]: With dead ends: 90 [2021-07-13 19:43:27,067 INFO L226 Difference]: Without dead ends: 90 [2021-07-13 19:43:27,067 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 138.4ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:27,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-07-13 19:43:27,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 63. [2021-07-13 19:43:27,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 62 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:27,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 129 transitions. [2021-07-13 19:43:27,069 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 129 transitions. Word has length 15 [2021-07-13 19:43:27,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:27,069 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 129 transitions. [2021-07-13 19:43:27,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:27,069 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 129 transitions. [2021-07-13 19:43:27,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:27,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:27,069 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:27,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable927,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:27,270 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:27,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:27,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1000021218, now seen corresponding path program 37 times [2021-07-13 19:43:27,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:27,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716558305] [2021-07-13 19:43:27,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:27,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:27,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:27,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:27,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716558305] [2021-07-13 19:43:27,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716558305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:27,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455941175] [2021-07-13 19:43:27,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:27,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:27,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:27,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:27,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:27,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:27,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:43:27,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:27,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:27,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:27,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:43:27,445 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:27,448 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:27,448 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:27,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:43:27,451 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:27,488 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-07-13 19:43:27,489 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:43:27,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:43:27,490 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:43:27,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:27,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455941175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:27,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:27,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:43:27,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982360159] [2021-07-13 19:43:27,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:27,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:27,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:27,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:27,524 INFO L87 Difference]: Start difference. First operand 63 states and 129 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:27,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:27,626 INFO L93 Difference]: Finished difference Result 86 states and 165 transitions. [2021-07-13 19:43:27,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:43:27,628 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:27,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:27,628 INFO L225 Difference]: With dead ends: 86 [2021-07-13 19:43:27,628 INFO L226 Difference]: Without dead ends: 86 [2021-07-13 19:43:27,629 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 143.0ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:27,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-07-13 19:43:27,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 63. [2021-07-13 19:43:27,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 62 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:27,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 129 transitions. [2021-07-13 19:43:27,630 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 129 transitions. Word has length 15 [2021-07-13 19:43:27,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:27,630 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 129 transitions. [2021-07-13 19:43:27,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:27,631 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 129 transitions. [2021-07-13 19:43:27,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:27,631 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:27,631 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:27,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable943,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:27,841 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:27,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:27,841 INFO L82 PathProgramCache]: Analyzing trace with hash -982776027, now seen corresponding path program 38 times [2021-07-13 19:43:27,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:27,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459643812] [2021-07-13 19:43:27,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:27,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:27,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:27,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:27,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459643812] [2021-07-13 19:43:27,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459643812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:27,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183351162] [2021-07-13 19:43:27,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:27,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:27,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:27,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:27,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:28,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:28,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:28,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:43:28,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:28,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:28,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:43:28,060 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:28,089 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:43:28,089 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:43:28,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:43:28,090 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:43:28,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:28,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183351162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:28,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:28,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:43:28,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375014115] [2021-07-13 19:43:28,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:28,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:28,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:28,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:28,163 INFO L87 Difference]: Start difference. First operand 63 states and 129 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:28,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:28,364 INFO L93 Difference]: Finished difference Result 92 states and 175 transitions. [2021-07-13 19:43:28,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:28,365 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:28,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:28,365 INFO L225 Difference]: With dead ends: 92 [2021-07-13 19:43:28,365 INFO L226 Difference]: Without dead ends: 90 [2021-07-13 19:43:28,365 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 246.6ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:28,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-07-13 19:43:28,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 62. [2021-07-13 19:43:28,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0655737704918034) internal successors, (126), 61 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:28,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 126 transitions. [2021-07-13 19:43:28,367 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 126 transitions. Word has length 15 [2021-07-13 19:43:28,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:28,367 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 126 transitions. [2021-07-13 19:43:28,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:28,367 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 126 transitions. [2021-07-13 19:43:28,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:28,368 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:28,368 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:28,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable952 [2021-07-13 19:43:28,568 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:28,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:28,569 INFO L82 PathProgramCache]: Analyzing trace with hash 464791416, now seen corresponding path program 39 times [2021-07-13 19:43:28,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:28,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451340884] [2021-07-13 19:43:28,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:28,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:28,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:28,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:28,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451340884] [2021-07-13 19:43:28,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451340884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:28,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462878715] [2021-07-13 19:43:28,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:28,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:43:28,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:28,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:28,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:28,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:28,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:28,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:43:28,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:28,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:28,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:43:28,712 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:28,732 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-07-13 19:43:28,732 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:43:28,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:43:28,733 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-07-13 19:43:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:28,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462878715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:28,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:28,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:43:28,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254489634] [2021-07-13 19:43:28,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:28,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:28,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:28,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:28,753 INFO L87 Difference]: Start difference. First operand 62 states and 126 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:28,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:28,835 INFO L93 Difference]: Finished difference Result 71 states and 141 transitions. [2021-07-13 19:43:28,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:43:28,836 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:28,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:28,836 INFO L225 Difference]: With dead ends: 71 [2021-07-13 19:43:28,836 INFO L226 Difference]: Without dead ends: 71 [2021-07-13 19:43:28,836 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 115.7ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:28,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-07-13 19:43:28,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2021-07-13 19:43:28,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:28,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 117 transitions. [2021-07-13 19:43:28,837 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 117 transitions. Word has length 15 [2021-07-13 19:43:28,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:28,837 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 117 transitions. [2021-07-13 19:43:28,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:28,838 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 117 transitions. [2021-07-13 19:43:28,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:28,838 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:28,838 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:29,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable965,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:29,038 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:29,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:29,039 INFO L82 PathProgramCache]: Analyzing trace with hash 92935129, now seen corresponding path program 40 times [2021-07-13 19:43:29,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:29,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632490768] [2021-07-13 19:43:29,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:29,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:29,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:29,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:29,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632490768] [2021-07-13 19:43:29,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632490768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:29,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406775115] [2021-07-13 19:43:29,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:29,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:29,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:29,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:29,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:29,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:29,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:29,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:43:29,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:43:29,234 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:43:29,237 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,272 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-07-13 19:43:29,273 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:43:29,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:29,274 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-07-13 19:43:29,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:29,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406775115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:29,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:29,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:43:29,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483857151] [2021-07-13 19:43:29,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:29,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:29,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:29,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:29,303 INFO L87 Difference]: Start difference. First operand 58 states and 117 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:29,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:29,389 INFO L93 Difference]: Finished difference Result 66 states and 129 transitions. [2021-07-13 19:43:29,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:29,389 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:29,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:29,390 INFO L225 Difference]: With dead ends: 66 [2021-07-13 19:43:29,390 INFO L226 Difference]: Without dead ends: 62 [2021-07-13 19:43:29,390 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:43:29,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-07-13 19:43:29,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2021-07-13 19:43:29,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 57 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:29,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 116 transitions. [2021-07-13 19:43:29,392 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 116 transitions. Word has length 15 [2021-07-13 19:43:29,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:29,392 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 116 transitions. [2021-07-13 19:43:29,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:29,392 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 116 transitions. [2021-07-13 19:43:29,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:29,392 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:29,392 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:29,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable969,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:29,594 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:29,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:29,594 INFO L82 PathProgramCache]: Analyzing trace with hash 355244938, now seen corresponding path program 41 times [2021-07-13 19:43:29,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:29,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240723405] [2021-07-13 19:43:29,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:29,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:29,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:29,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240723405] [2021-07-13 19:43:29,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240723405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:29,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61951972] [2021-07-13 19:43:29,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:29,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:29,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:29,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:29,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:29,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:29,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:29,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:43:29,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:43:29,780 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:43:29,783 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,816 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-07-13 19:43:29,817 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:43:29,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:29,818 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-07-13 19:43:29,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:29,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61951972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:29,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:29,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:43:29,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931944111] [2021-07-13 19:43:29,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:29,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:29,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:29,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:29,841 INFO L87 Difference]: Start difference. First operand 58 states and 116 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:29,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:29,972 INFO L93 Difference]: Finished difference Result 71 states and 137 transitions. [2021-07-13 19:43:29,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:29,973 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:29,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:29,973 INFO L225 Difference]: With dead ends: 71 [2021-07-13 19:43:29,973 INFO L226 Difference]: Without dead ends: 65 [2021-07-13 19:43:29,974 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 141.9ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:29,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-07-13 19:43:29,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2021-07-13 19:43:29,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.017543859649123) internal successors, (115), 57 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:29,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 115 transitions. [2021-07-13 19:43:29,976 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 115 transitions. Word has length 15 [2021-07-13 19:43:29,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:29,976 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 115 transitions. [2021-07-13 19:43:29,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:29,977 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 115 transitions. [2021-07-13 19:43:29,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:29,977 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:29,977 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:30,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable981 [2021-07-13 19:43:30,189 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:30,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:30,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1097366315, now seen corresponding path program 42 times [2021-07-13 19:43:30,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:30,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861951790] [2021-07-13 19:43:30,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:30,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:30,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:30,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:30,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861951790] [2021-07-13 19:43:30,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861951790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:30,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133979584] [2021-07-13 19:43:30,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:30,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:43:30,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:30,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:30,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:30,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:30,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:30,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:43:30,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:30,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:30,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:43:30,371 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:30,393 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-07-13 19:43:30,394 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:43:30,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:43:30,395 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-07-13 19:43:30,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:30,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133979584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:30,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:30,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:43:30,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947347562] [2021-07-13 19:43:30,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:30,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:30,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:30,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:30,416 INFO L87 Difference]: Start difference. First operand 58 states and 115 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:30,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:30,515 INFO L93 Difference]: Finished difference Result 66 states and 131 transitions. [2021-07-13 19:43:30,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:43:30,515 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:30,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:30,516 INFO L225 Difference]: With dead ends: 66 [2021-07-13 19:43:30,516 INFO L226 Difference]: Without dead ends: 66 [2021-07-13 19:43:30,516 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 138.5ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:30,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-07-13 19:43:30,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2021-07-13 19:43:30,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.017543859649123) internal successors, (115), 57 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:30,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 115 transitions. [2021-07-13 19:43:30,517 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 115 transitions. Word has length 15 [2021-07-13 19:43:30,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:30,518 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 115 transitions. [2021-07-13 19:43:30,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:30,518 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 115 transitions. [2021-07-13 19:43:30,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:30,518 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:30,518 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:30,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable994 [2021-07-13 19:43:30,721 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:30,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:30,721 INFO L82 PathProgramCache]: Analyzing trace with hash 114798790, now seen corresponding path program 43 times [2021-07-13 19:43:30,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:30,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401888517] [2021-07-13 19:43:30,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:30,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:30,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:30,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:30,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401888517] [2021-07-13 19:43:30,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401888517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:30,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996037243] [2021-07-13 19:43:30,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:30,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:30,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:30,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:30,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:30,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:43:30,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:30,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:30,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:43:30,891 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:30,919 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:43:30,920 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:43:30,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:43:30,921 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:43:30,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:30,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996037243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:30,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:30,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:43:30,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285942045] [2021-07-13 19:43:30,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:30,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:30,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:30,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:30,964 INFO L87 Difference]: Start difference. First operand 58 states and 115 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:31,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:31,196 INFO L93 Difference]: Finished difference Result 85 states and 160 transitions. [2021-07-13 19:43:31,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:43:31,197 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:31,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:31,197 INFO L225 Difference]: With dead ends: 85 [2021-07-13 19:43:31,197 INFO L226 Difference]: Without dead ends: 82 [2021-07-13 19:43:31,198 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 257.0ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:43:31,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-07-13 19:43:31,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2021-07-13 19:43:31,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 62 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:31,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 127 transitions. [2021-07-13 19:43:31,200 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 127 transitions. Word has length 15 [2021-07-13 19:43:31,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:31,200 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 127 transitions. [2021-07-13 19:43:31,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:31,200 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 127 transitions. [2021-07-13 19:43:31,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:31,200 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:31,200 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:31,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable998 [2021-07-13 19:43:31,409 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:31,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:31,409 INFO L82 PathProgramCache]: Analyzing trace with hash -138356475, now seen corresponding path program 44 times [2021-07-13 19:43:31,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:31,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350598180] [2021-07-13 19:43:31,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:31,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:31,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:31,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:31,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350598180] [2021-07-13 19:43:31,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350598180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:31,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448896517] [2021-07-13 19:43:31,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:31,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:31,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:31,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:31,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:31,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:43:31,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:31,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:43:31,573 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:31,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:31,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:31,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:43:31,577 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:31,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:31,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:43:31,581 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:31,614 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-07-13 19:43:31,615 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:43:31,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:43:31,616 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:43:31,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:31,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448896517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:31,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:31,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:43:31,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631492274] [2021-07-13 19:43:31,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:31,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:31,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:31,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:31,652 INFO L87 Difference]: Start difference. First operand 63 states and 127 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:31,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:31,754 INFO L93 Difference]: Finished difference Result 92 states and 177 transitions. [2021-07-13 19:43:31,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:43:31,755 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:31,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:31,755 INFO L225 Difference]: With dead ends: 92 [2021-07-13 19:43:31,755 INFO L226 Difference]: Without dead ends: 92 [2021-07-13 19:43:31,755 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 134.4ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:31,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-13 19:43:31,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 63. [2021-07-13 19:43:31,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 62 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:31,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 127 transitions. [2021-07-13 19:43:31,757 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 127 transitions. Word has length 15 [2021-07-13 19:43:31,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:31,757 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 127 transitions. [2021-07-13 19:43:31,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:31,758 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 127 transitions. [2021-07-13 19:43:31,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:31,758 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:31,758 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:31,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1016,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:31,976 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:31,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:31,976 INFO L82 PathProgramCache]: Analyzing trace with hash -585694198, now seen corresponding path program 45 times [2021-07-13 19:43:31,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:31,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058604215] [2021-07-13 19:43:31,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:31,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:32,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:32,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:32,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058604215] [2021-07-13 19:43:32,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058604215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:32,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657795101] [2021-07-13 19:43:32,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:32,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:43:32,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:32,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:32,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:32,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:32,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:32,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:43:32,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:32,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:32,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:43:32,158 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:32,192 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:43:32,192 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:43:32,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:43:32,193 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:43:32,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:32,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657795101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:32,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:32,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:43:32,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240518512] [2021-07-13 19:43:32,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:32,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:32,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:32,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:32,227 INFO L87 Difference]: Start difference. First operand 63 states and 127 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:32,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:32,322 INFO L93 Difference]: Finished difference Result 70 states and 139 transitions. [2021-07-13 19:43:32,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:43:32,322 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:32,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:32,323 INFO L225 Difference]: With dead ends: 70 [2021-07-13 19:43:32,323 INFO L226 Difference]: Without dead ends: 70 [2021-07-13 19:43:32,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 123.0ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:32,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-07-13 19:43:32,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2021-07-13 19:43:32,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:32,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 118 transitions. [2021-07-13 19:43:32,325 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 118 transitions. Word has length 15 [2021-07-13 19:43:32,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:32,325 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 118 transitions. [2021-07-13 19:43:32,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:32,325 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 118 transitions. [2021-07-13 19:43:32,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:32,325 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:32,325 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:32,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1025 [2021-07-13 19:43:32,541 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:32,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:32,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1726475853, now seen corresponding path program 46 times [2021-07-13 19:43:32,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:32,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584588645] [2021-07-13 19:43:32,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:32,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:32,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:32,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:32,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584588645] [2021-07-13 19:43:32,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584588645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:32,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088617189] [2021-07-13 19:43:32,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:32,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:32,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:32,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:32,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:32,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:32,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:32,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:43:32,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:32,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:43:32,704 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:32,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:32,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:32,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:43:32,708 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:32,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:43:32,711 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:32,746 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-07-13 19:43:32,746 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:43:32,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:43:32,748 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:43:32,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:32,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088617189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:32,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:32,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:43:32,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045177859] [2021-07-13 19:43:32,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:32,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:32,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:32,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:32,813 INFO L87 Difference]: Start difference. First operand 59 states and 118 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:32,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:32,933 INFO L93 Difference]: Finished difference Result 69 states and 135 transitions. [2021-07-13 19:43:32,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:43:32,940 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:32,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:32,940 INFO L225 Difference]: With dead ends: 69 [2021-07-13 19:43:32,940 INFO L226 Difference]: Without dead ends: 67 [2021-07-13 19:43:32,941 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 182.5ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:43:32,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-07-13 19:43:32,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2021-07-13 19:43:32,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.017857142857143) internal successors, (113), 56 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:32,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 113 transitions. [2021-07-13 19:43:32,942 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 113 transitions. Word has length 15 [2021-07-13 19:43:32,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:32,942 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 113 transitions. [2021-07-13 19:43:32,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:32,942 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 113 transitions. [2021-07-13 19:43:32,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:32,943 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:32,943 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:33,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1041,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:33,148 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:33,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:33,149 INFO L82 PathProgramCache]: Analyzing trace with hash 702544112, now seen corresponding path program 47 times [2021-07-13 19:43:33,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:33,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860387894] [2021-07-13 19:43:33,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:33,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:33,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:33,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860387894] [2021-07-13 19:43:33,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860387894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:33,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248945139] [2021-07-13 19:43:33,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:33,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:43:33,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:33,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:33,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:33,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:33,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:33,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:43:33,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:33,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:33,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:43:33,302 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:33,328 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:43:33,328 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:43:33,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:43:33,329 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:43:33,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:33,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248945139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:33,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:33,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:43:33,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456286369] [2021-07-13 19:43:33,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:33,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:33,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:33,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:33,372 INFO L87 Difference]: Start difference. First operand 57 states and 113 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:33,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:33,616 INFO L93 Difference]: Finished difference Result 84 states and 158 transitions. [2021-07-13 19:43:33,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:33,616 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:33,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:33,617 INFO L225 Difference]: With dead ends: 84 [2021-07-13 19:43:33,617 INFO L226 Difference]: Without dead ends: 81 [2021-07-13 19:43:33,617 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 262.2ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:43:33,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-07-13 19:43:33,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 64. [2021-07-13 19:43:33,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:33,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 131 transitions. [2021-07-13 19:43:33,619 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 131 transitions. Word has length 15 [2021-07-13 19:43:33,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:33,619 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 131 transitions. [2021-07-13 19:43:33,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:33,619 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 131 transitions. [2021-07-13 19:43:33,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:33,620 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:33,620 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:33,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1053,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:33,837 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:33,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:33,837 INFO L82 PathProgramCache]: Analyzing trace with hash 449388847, now seen corresponding path program 48 times [2021-07-13 19:43:33,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:33,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041764595] [2021-07-13 19:43:33,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:33,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:33,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:33,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:33,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041764595] [2021-07-13 19:43:33,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041764595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:33,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696903569] [2021-07-13 19:43:33,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:33,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:43:33,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:33,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:33,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:34,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:43:34,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:34,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:34,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:43:34,061 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:34,109 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-07-13 19:43:34,109 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:43:34,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:43:34,113 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:34,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:34,132 INFO L518 ElimStorePlain]: Eliminatee v_prenex_40 vanished before elimination [2021-07-13 19:43:34,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:43:34,134 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:43:34,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:34,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696903569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:34,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:34,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:43:34,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757400792] [2021-07-13 19:43:34,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:34,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:34,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:34,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:34,185 INFO L87 Difference]: Start difference. First operand 64 states and 131 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:34,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:34,310 INFO L93 Difference]: Finished difference Result 88 states and 170 transitions. [2021-07-13 19:43:34,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:34,314 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:34,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:34,315 INFO L225 Difference]: With dead ends: 88 [2021-07-13 19:43:34,315 INFO L226 Difference]: Without dead ends: 88 [2021-07-13 19:43:34,315 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 193.1ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:34,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-07-13 19:43:34,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 64. [2021-07-13 19:43:34,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:34,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 131 transitions. [2021-07-13 19:43:34,317 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 131 transitions. Word has length 15 [2021-07-13 19:43:34,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:34,317 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 131 transitions. [2021-07-13 19:43:34,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:34,317 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 131 transitions. [2021-07-13 19:43:34,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:34,318 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:34,318 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:34,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1063,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:34,540 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:34,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:34,541 INFO L82 PathProgramCache]: Analyzing trace with hash 2051124, now seen corresponding path program 49 times [2021-07-13 19:43:34,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:34,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984383847] [2021-07-13 19:43:34,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:34,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:34,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:34,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:34,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984383847] [2021-07-13 19:43:34,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984383847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:34,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627793155] [2021-07-13 19:43:34,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:34,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:34,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:34,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:34,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:34,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:34,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:43:34,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:34,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:34,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:43:34,760 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:34,785 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:43:34,785 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:43:34,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:43:34,786 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:43:34,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:34,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627793155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:34,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:34,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:43:34,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109908952] [2021-07-13 19:43:34,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:34,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:34,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:34,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:34,820 INFO L87 Difference]: Start difference. First operand 64 states and 131 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:34,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:34,984 INFO L93 Difference]: Finished difference Result 84 states and 161 transitions. [2021-07-13 19:43:34,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:43:34,984 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:34,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:34,985 INFO L225 Difference]: With dead ends: 84 [2021-07-13 19:43:34,985 INFO L226 Difference]: Without dead ends: 84 [2021-07-13 19:43:34,985 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 190.9ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:34,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-07-13 19:43:34,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 64. [2021-07-13 19:43:34,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:34,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 131 transitions. [2021-07-13 19:43:34,986 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 131 transitions. Word has length 15 [2021-07-13 19:43:34,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:34,987 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 131 transitions. [2021-07-13 19:43:34,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:34,987 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 131 transitions. [2021-07-13 19:43:34,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:34,987 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:34,987 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:35,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1080,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:35,201 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:35,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:35,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1980746121, now seen corresponding path program 50 times [2021-07-13 19:43:35,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:35,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689122848] [2021-07-13 19:43:35,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:35,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:35,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:35,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689122848] [2021-07-13 19:43:35,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689122848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:35,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665618058] [2021-07-13 19:43:35,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:35,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:35,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:35,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:35,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:35,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:43:35,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:35,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:35,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:43:35,414 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:35,453 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-07-13 19:43:35,453 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:43:35,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:43:35,456 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:35,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:35,470 INFO L518 ElimStorePlain]: Eliminatee v_prenex_42 vanished before elimination [2021-07-13 19:43:35,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:43:35,471 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:43:35,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:35,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665618058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:35,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:35,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:43:35,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276062899] [2021-07-13 19:43:35,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:35,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:35,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:35,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:35,536 INFO L87 Difference]: Start difference. First operand 64 states and 131 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:35,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:35,747 INFO L93 Difference]: Finished difference Result 90 states and 171 transitions. [2021-07-13 19:43:35,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:43:35,749 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:35,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:35,749 INFO L225 Difference]: With dead ends: 90 [2021-07-13 19:43:35,749 INFO L226 Difference]: Without dead ends: 88 [2021-07-13 19:43:35,749 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 271.3ms TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:35,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-07-13 19:43:35,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2021-07-13 19:43:35,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.064516129032258) internal successors, (128), 62 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:35,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 128 transitions. [2021-07-13 19:43:35,751 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 128 transitions. Word has length 15 [2021-07-13 19:43:35,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:35,751 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 128 transitions. [2021-07-13 19:43:35,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:35,751 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 128 transitions. [2021-07-13 19:43:35,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:35,752 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:35,752 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:35,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1090 [2021-07-13 19:43:35,965 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:35,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:35,965 INFO L82 PathProgramCache]: Analyzing trace with hash -533178678, now seen corresponding path program 51 times [2021-07-13 19:43:35,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:35,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352765745] [2021-07-13 19:43:35,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:35,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:36,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:36,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:36,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352765745] [2021-07-13 19:43:36,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352765745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:36,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750847059] [2021-07-13 19:43:36,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:36,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:43:36,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:36,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:36,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:36,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:36,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:36,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:43:36,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:36,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:43:36,153 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,174 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:43:36,174 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:43:36,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,175 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:43:36,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:36,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750847059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:36,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:36,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:43:36,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937758486] [2021-07-13 19:43:36,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:36,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:36,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:36,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:36,193 INFO L87 Difference]: Start difference. First operand 63 states and 128 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:36,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:36,303 INFO L93 Difference]: Finished difference Result 69 states and 137 transitions. [2021-07-13 19:43:36,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:43:36,308 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:36,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:36,308 INFO L225 Difference]: With dead ends: 69 [2021-07-13 19:43:36,308 INFO L226 Difference]: Without dead ends: 69 [2021-07-13 19:43:36,309 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 153.4ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:36,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-07-13 19:43:36,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2021-07-13 19:43:36,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 57 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:36,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 116 transitions. [2021-07-13 19:43:36,310 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 116 transitions. Word has length 15 [2021-07-13 19:43:36,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:36,310 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 116 transitions. [2021-07-13 19:43:36,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:36,310 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 116 transitions. [2021-07-13 19:43:36,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:36,311 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:36,311 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:36,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1110 [2021-07-13 19:43:36,523 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:36,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:36,523 INFO L82 PathProgramCache]: Analyzing trace with hash -905034965, now seen corresponding path program 52 times [2021-07-13 19:43:36,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:36,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732299596] [2021-07-13 19:43:36,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:36,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:36,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:36,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:36,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732299596] [2021-07-13 19:43:36,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732299596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:36,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291079469] [2021-07-13 19:43:36,579 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:36,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:36,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:36,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:36,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:36,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:36,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:36,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:43:36,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,814 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:36,814 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,849 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:43:36,849 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:43:36,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:43:36,853 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:36,866 INFO L518 ElimStorePlain]: Eliminatee v_prenex_48 vanished before elimination [2021-07-13 19:43:36,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:36,867 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:43:36,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:36,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291079469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:36,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:36,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:43:36,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019253716] [2021-07-13 19:43:36,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:36,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:36,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:36,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:36,892 INFO L87 Difference]: Start difference. First operand 58 states and 116 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:37,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:37,049 INFO L93 Difference]: Finished difference Result 63 states and 122 transitions. [2021-07-13 19:43:37,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:37,049 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:37,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:37,049 INFO L225 Difference]: With dead ends: 63 [2021-07-13 19:43:37,049 INFO L226 Difference]: Without dead ends: 59 [2021-07-13 19:43:37,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 212.2ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:37,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-07-13 19:43:37,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-07-13 19:43:37,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:37,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 111 transitions. [2021-07-13 19:43:37,051 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 111 transitions. Word has length 15 [2021-07-13 19:43:37,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:37,051 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 111 transitions. [2021-07-13 19:43:37,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:37,051 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 111 transitions. [2021-07-13 19:43:37,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:37,052 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:37,052 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:37,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1114,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:37,275 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:37,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:37,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1069052448, now seen corresponding path program 53 times [2021-07-13 19:43:37,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:37,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651683460] [2021-07-13 19:43:37,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:37,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:37,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:37,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:37,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651683460] [2021-07-13 19:43:37,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651683460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:37,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131488172] [2021-07-13 19:43:37,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:37,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:43:37,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:37,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:37,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:37,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:37,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:37,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:43:37,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:37,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:37,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:43:37,466 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:37,501 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:43:37,501 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:43:37,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:43:37,502 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:43:37,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:37,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131488172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:37,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:37,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:43:37,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912301869] [2021-07-13 19:43:37,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:37,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:37,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:37,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:37,551 INFO L87 Difference]: Start difference. First operand 56 states and 111 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:37,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:37,893 INFO L93 Difference]: Finished difference Result 86 states and 159 transitions. [2021-07-13 19:43:37,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:43:37,893 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:37,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:37,893 INFO L225 Difference]: With dead ends: 86 [2021-07-13 19:43:37,894 INFO L226 Difference]: Without dead ends: 83 [2021-07-13 19:43:37,894 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 375.6ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:43:37,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-07-13 19:43:37,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 61. [2021-07-13 19:43:37,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.033333333333333) internal successors, (122), 60 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:37,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 122 transitions. [2021-07-13 19:43:37,895 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 122 transitions. Word has length 15 [2021-07-13 19:43:37,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:37,896 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 122 transitions. [2021-07-13 19:43:37,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:37,896 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 122 transitions. [2021-07-13 19:43:37,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:37,896 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:37,896 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:38,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1141,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:38,097 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:38,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:38,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1322207713, now seen corresponding path program 54 times [2021-07-13 19:43:38,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:38,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512583977] [2021-07-13 19:43:38,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:38,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:38,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:38,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:38,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512583977] [2021-07-13 19:43:38,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512583977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:38,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328201558] [2021-07-13 19:43:38,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:38,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:43:38,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:38,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:38,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:38,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:38,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:38,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:43:38,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:38,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:43:38,319 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:38,365 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-07-13 19:43:38,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:43:38,370 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:38,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:38,389 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:43:38,389 INFO L518 ElimStorePlain]: Eliminatee v_prenex_51 vanished before elimination [2021-07-13 19:43:38,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:43:38,391 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:43:38,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:38,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328201558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:38,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:38,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:43:38,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341015939] [2021-07-13 19:43:38,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:38,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:38,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:38,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:38,457 INFO L87 Difference]: Start difference. First operand 61 states and 122 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:38,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:38,750 INFO L93 Difference]: Finished difference Result 86 states and 163 transitions. [2021-07-13 19:43:38,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:38,750 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:38,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:38,751 INFO L225 Difference]: With dead ends: 86 [2021-07-13 19:43:38,751 INFO L226 Difference]: Without dead ends: 86 [2021-07-13 19:43:38,751 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 308.2ms TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:43:38,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-07-13 19:43:38,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2021-07-13 19:43:38,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.033333333333333) internal successors, (122), 60 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:38,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 122 transitions. [2021-07-13 19:43:38,753 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 122 transitions. Word has length 15 [2021-07-13 19:43:38,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:38,753 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 122 transitions. [2021-07-13 19:43:38,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:38,753 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 122 transitions. [2021-07-13 19:43:38,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:38,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:38,753 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:38,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1151,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:38,961 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:38,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:38,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1769545436, now seen corresponding path program 55 times [2021-07-13 19:43:38,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:38,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367146800] [2021-07-13 19:43:38,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:38,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:39,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:39,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:39,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367146800] [2021-07-13 19:43:39,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367146800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:39,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935211343] [2021-07-13 19:43:39,022 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:39,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:39,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:39,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:39,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:43:39,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:39,194 INFO L628 ElimStorePlain]: treesize reduction 49, result has 34.7 percent of original size [2021-07-13 19:43:39,194 INFO L518 ElimStorePlain]: Eliminatee v_prenex_54 vanished before elimination [2021-07-13 19:43:39,194 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:43:39,194 INFO L518 ElimStorePlain]: Eliminatee v_prenex_53 vanished before elimination [2021-07-13 19:43:39,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:43:39,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:82, output treesize:18 [2021-07-13 19:43:39,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:39,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935211343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:39,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:39,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:43:39,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363804724] [2021-07-13 19:43:39,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:39,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:39,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:39,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:39,241 INFO L87 Difference]: Start difference. First operand 61 states and 122 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:39,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:39,511 INFO L93 Difference]: Finished difference Result 89 states and 168 transitions. [2021-07-13 19:43:39,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:39,511 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:39,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:39,512 INFO L225 Difference]: With dead ends: 89 [2021-07-13 19:43:39,512 INFO L226 Difference]: Without dead ends: 89 [2021-07-13 19:43:39,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 296.4ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:43:39,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-07-13 19:43:39,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 61. [2021-07-13 19:43:39,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.033333333333333) internal successors, (122), 60 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:39,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 122 transitions. [2021-07-13 19:43:39,514 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 122 transitions. Word has length 15 [2021-07-13 19:43:39,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:39,514 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 122 transitions. [2021-07-13 19:43:39,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:39,514 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 122 transitions. [2021-07-13 19:43:39,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:39,515 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:39,515 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:39,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1162 [2021-07-13 19:43:39,721 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:39,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:39,721 INFO L82 PathProgramCache]: Analyzing trace with hash 542624615, now seen corresponding path program 56 times [2021-07-13 19:43:39,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:39,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890396150] [2021-07-13 19:43:39,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:39,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:39,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:39,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:39,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890396150] [2021-07-13 19:43:39,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890396150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:39,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108834904] [2021-07-13 19:43:39,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:39,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:39,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:39,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:39,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:39,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:43:39,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:39,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:39,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:43:39,953 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:39,993 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-07-13 19:43:39,993 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:43:39,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:43:39,996 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:40,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:40,010 INFO L518 ElimStorePlain]: Eliminatee v_prenex_56 vanished before elimination [2021-07-13 19:43:40,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:43:40,012 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:43:40,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:40,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108834904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:40,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:40,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:43:40,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129834721] [2021-07-13 19:43:40,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:40,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:40,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:40,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:40,080 INFO L87 Difference]: Start difference. First operand 61 states and 122 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:40,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:40,518 INFO L93 Difference]: Finished difference Result 88 states and 164 transitions. [2021-07-13 19:43:40,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:43:40,519 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:40,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:40,519 INFO L225 Difference]: With dead ends: 88 [2021-07-13 19:43:40,519 INFO L226 Difference]: Without dead ends: 86 [2021-07-13 19:43:40,520 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 465.2ms TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:43:40,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-07-13 19:43:40,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2021-07-13 19:43:40,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:40,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 119 transitions. [2021-07-13 19:43:40,521 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 119 transitions. Word has length 15 [2021-07-13 19:43:40,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:40,521 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 119 transitions. [2021-07-13 19:43:40,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:40,521 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 119 transitions. [2021-07-13 19:43:40,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:40,522 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:40,522 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:40,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1176 [2021-07-13 19:43:40,722 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:40,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:40,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1990192058, now seen corresponding path program 57 times [2021-07-13 19:43:40,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:40,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937136293] [2021-07-13 19:43:40,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:40,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:40,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:40,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:40,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937136293] [2021-07-13 19:43:40,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937136293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:40,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281709057] [2021-07-13 19:43:40,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:40,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:43:40,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:40,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:40,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:40,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:40,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:40,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:43:40,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:40,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:40,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:43:40,932 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:40,952 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:43:40,952 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:43:40,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:43:40,953 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:43:40,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:40,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281709057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:40,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:40,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:43:40,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036024291] [2021-07-13 19:43:40,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:40,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:40,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:40,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:40,974 INFO L87 Difference]: Start difference. First operand 60 states and 119 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:41,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:41,056 INFO L93 Difference]: Finished difference Result 73 states and 143 transitions. [2021-07-13 19:43:41,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:43:41,056 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:41,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:41,056 INFO L225 Difference]: With dead ends: 73 [2021-07-13 19:43:41,056 INFO L226 Difference]: Without dead ends: 73 [2021-07-13 19:43:41,057 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 159.8ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:41,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-07-13 19:43:41,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 60. [2021-07-13 19:43:41,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:41,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 119 transitions. [2021-07-13 19:43:41,058 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 119 transitions. Word has length 15 [2021-07-13 19:43:41,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:41,058 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 119 transitions. [2021-07-13 19:43:41,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:41,058 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 119 transitions. [2021-07-13 19:43:41,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:41,058 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:41,058 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:41,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1196,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:41,265 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:41,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:41,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1618335771, now seen corresponding path program 58 times [2021-07-13 19:43:41,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:41,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683038197] [2021-07-13 19:43:41,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:41,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:41,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:41,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:41,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683038197] [2021-07-13 19:43:41,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683038197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:41,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547144301] [2021-07-13 19:43:41,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:41,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:41,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:41,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:41,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:41,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:41,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:41,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:43:41,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:41,570 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:41,571 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:41,608 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:43:41,609 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:43:41,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:43:41,612 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:41,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:41,624 INFO L518 ElimStorePlain]: Eliminatee v_prenex_62 vanished before elimination [2021-07-13 19:43:41,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:41,625 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:43:41,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:41,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547144301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:41,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:41,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:43:41,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897956676] [2021-07-13 19:43:41,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:41,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:41,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:41,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:41,649 INFO L87 Difference]: Start difference. First operand 60 states and 119 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:41,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:41,857 INFO L93 Difference]: Finished difference Result 80 states and 146 transitions. [2021-07-13 19:43:41,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:43:41,857 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:41,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:41,857 INFO L225 Difference]: With dead ends: 80 [2021-07-13 19:43:41,857 INFO L226 Difference]: Without dead ends: 76 [2021-07-13 19:43:41,858 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 271.1ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:43:41,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-07-13 19:43:41,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2021-07-13 19:43:41,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0) internal successors, (116), 58 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:41,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 116 transitions. [2021-07-13 19:43:41,859 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 116 transitions. Word has length 15 [2021-07-13 19:43:41,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:41,859 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 116 transitions. [2021-07-13 19:43:41,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:41,859 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 116 transitions. [2021-07-13 19:43:41,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:41,859 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:41,859 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:42,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1200 [2021-07-13 19:43:42,060 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:42,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:42,060 INFO L82 PathProgramCache]: Analyzing trace with hash 2071591114, now seen corresponding path program 59 times [2021-07-13 19:43:42,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:42,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660217778] [2021-07-13 19:43:42,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:42,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:42,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:42,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:42,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660217778] [2021-07-13 19:43:42,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660217778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:42,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306259785] [2021-07-13 19:43:42,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:42,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:43:42,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:42,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:42,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:42,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:42,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306259785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:42,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:42,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:43:42,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882343747] [2021-07-13 19:43:42,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:43:42,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:42,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:43:42,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:43:42,227 INFO L87 Difference]: Start difference. First operand 59 states and 116 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:42,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:42,364 INFO L93 Difference]: Finished difference Result 81 states and 149 transitions. [2021-07-13 19:43:42,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:43:42,365 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:42,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:42,365 INFO L225 Difference]: With dead ends: 81 [2021-07-13 19:43:42,365 INFO L226 Difference]: Without dead ends: 81 [2021-07-13 19:43:42,365 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 172.6ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:42,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-07-13 19:43:42,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 52. [2021-07-13 19:43:42,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:42,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 101 transitions. [2021-07-13 19:43:42,369 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 101 transitions. Word has length 15 [2021-07-13 19:43:42,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:42,370 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 101 transitions. [2021-07-13 19:43:42,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:42,370 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 101 transitions. [2021-07-13 19:43:42,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:43:42,370 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:42,370 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:42,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1216 [2021-07-13 19:43:42,593 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:42,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:42,594 INFO L82 PathProgramCache]: Analyzing trace with hash 99296973, now seen corresponding path program 60 times [2021-07-13 19:43:42,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:42,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370804644] [2021-07-13 19:43:42,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:42,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:42,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:42,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:42,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370804644] [2021-07-13 19:43:42,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370804644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:42,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506181079] [2021-07-13 19:43:42,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:42,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:43:42,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:42,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:43:42,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:42,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:42,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506181079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:42,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:42,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:43:42,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537032126] [2021-07-13 19:43:42,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:43:42,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:42,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:43:42,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:43:42,786 INFO L87 Difference]: Start difference. First operand 52 states and 101 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:42,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:42,933 INFO L93 Difference]: Finished difference Result 58 states and 108 transitions. [2021-07-13 19:43:42,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:42,934 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:43:42,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:42,934 INFO L225 Difference]: With dead ends: 58 [2021-07-13 19:43:42,934 INFO L226 Difference]: Without dead ends: 52 [2021-07-13 19:43:42,934 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 186.6ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:43:42,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-07-13 19:43:42,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-07-13 19:43:42,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 51 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:42,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 100 transitions. [2021-07-13 19:43:42,936 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 100 transitions. Word has length 15 [2021-07-13 19:43:42,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:42,936 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 100 transitions. [2021-07-13 19:43:42,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:42,936 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 100 transitions. [2021-07-13 19:43:42,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:43:42,936 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:42,936 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:43,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1219,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:43,153 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:43,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:43,153 INFO L82 PathProgramCache]: Analyzing trace with hash -2072597181, now seen corresponding path program 61 times [2021-07-13 19:43:43,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:43,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675042151] [2021-07-13 19:43:43,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:43,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:43,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:43,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:43,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675042151] [2021-07-13 19:43:43,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675042151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:43,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009890131] [2021-07-13 19:43:43,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:43,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:43,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:43:43,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:43,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:43,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009890131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:43,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:43,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:43:43,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339439268] [2021-07-13 19:43:43,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:43:43,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:43,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:43:43,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:43:43,466 INFO L87 Difference]: Start difference. First operand 52 states and 100 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:43,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:43,876 INFO L93 Difference]: Finished difference Result 98 states and 183 transitions. [2021-07-13 19:43:43,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:43,877 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:43:43,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:43,877 INFO L225 Difference]: With dead ends: 98 [2021-07-13 19:43:43,877 INFO L226 Difference]: Without dead ends: 91 [2021-07-13 19:43:43,877 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 516.0ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:43:43,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-07-13 19:43:43,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 62. [2021-07-13 19:43:43,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 61 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:43,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 119 transitions. [2021-07-13 19:43:43,879 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 119 transitions. Word has length 16 [2021-07-13 19:43:43,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:43,879 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 119 transitions. [2021-07-13 19:43:43,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:43,879 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 119 transitions. [2021-07-13 19:43:43,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:43:43,880 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:43,880 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:44,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1225 [2021-07-13 19:43:44,093 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:44,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:44,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1529967491, now seen corresponding path program 62 times [2021-07-13 19:43:44,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:44,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49011616] [2021-07-13 19:43:44,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:44,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:44,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:44,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:44,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49011616] [2021-07-13 19:43:44,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49011616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:44,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897968382] [2021-07-13 19:43:44,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:44,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:44,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:44,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:43:44,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:44,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897968382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:44,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:44,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:43:44,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425322316] [2021-07-13 19:43:44,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:44,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:44,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:44,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:44,501 INFO L87 Difference]: Start difference. First operand 62 states and 119 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:44,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:44,821 INFO L93 Difference]: Finished difference Result 102 states and 191 transitions. [2021-07-13 19:43:44,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:44,821 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:43:44,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:44,821 INFO L225 Difference]: With dead ends: 102 [2021-07-13 19:43:44,822 INFO L226 Difference]: Without dead ends: 95 [2021-07-13 19:43:44,822 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 445.7ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:43:44,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-07-13 19:43:44,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 63. [2021-07-13 19:43:44,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.967741935483871) internal successors, (122), 62 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:44,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 122 transitions. [2021-07-13 19:43:44,823 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 122 transitions. Word has length 16 [2021-07-13 19:43:44,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:44,824 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 122 transitions. [2021-07-13 19:43:44,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:44,824 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 122 transitions. [2021-07-13 19:43:44,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:43:44,824 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:44,824 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:45,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1241,66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:45,045 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:45,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:45,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1289521343, now seen corresponding path program 63 times [2021-07-13 19:43:45,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:45,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81369107] [2021-07-13 19:43:45,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:45,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:45,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:45,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81369107] [2021-07-13 19:43:45,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81369107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:45,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934830490] [2021-07-13 19:43:45,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:45,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:43:45,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:45,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:43:45,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:45,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:45,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934830490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:45,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:45,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 19:43:45,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54135829] [2021-07-13 19:43:45,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:43:45,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:45,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:43:45,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:43:45,633 INFO L87 Difference]: Start difference. First operand 63 states and 122 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:45,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:45,996 INFO L93 Difference]: Finished difference Result 103 states and 194 transitions. [2021-07-13 19:43:45,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:45,997 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:43:45,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:45,997 INFO L225 Difference]: With dead ends: 103 [2021-07-13 19:43:45,997 INFO L226 Difference]: Without dead ends: 96 [2021-07-13 19:43:45,997 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 686.5ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:43:45,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-07-13 19:43:45,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 64. [2021-07-13 19:43:45,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 63 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:45,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 125 transitions. [2021-07-13 19:43:45,999 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 125 transitions. Word has length 16 [2021-07-13 19:43:45,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:45,999 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 125 transitions. [2021-07-13 19:43:45,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:45,999 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 125 transitions. [2021-07-13 19:43:45,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:43:45,999 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:45,999 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:46,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1271,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:46,200 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:46,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:46,200 INFO L82 PathProgramCache]: Analyzing trace with hash 589028355, now seen corresponding path program 64 times [2021-07-13 19:43:46,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:46,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183021068] [2021-07-13 19:43:46,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:46,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:46,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:46,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:46,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183021068] [2021-07-13 19:43:46,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183021068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:46,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047982606] [2021-07-13 19:43:46,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:46,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:46,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:46,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:43:46,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:46,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:46,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047982606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:46,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:46,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 19:43:46,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045026161] [2021-07-13 19:43:46,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:43:46,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:46,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:43:46,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:43:46,759 INFO L87 Difference]: Start difference. First operand 64 states and 125 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:47,062 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-07-13 19:43:47,199 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-07-13 19:43:47,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:47,211 INFO L93 Difference]: Finished difference Result 115 states and 210 transitions. [2021-07-13 19:43:47,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:47,211 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:43:47,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:47,212 INFO L225 Difference]: With dead ends: 115 [2021-07-13 19:43:47,212 INFO L226 Difference]: Without dead ends: 105 [2021-07-13 19:43:47,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 778.2ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:43:47,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-07-13 19:43:47,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 65. [2021-07-13 19:43:47,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.0) internal successors, (128), 64 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:47,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 128 transitions. [2021-07-13 19:43:47,213 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 128 transitions. Word has length 16 [2021-07-13 19:43:47,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:47,214 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 128 transitions. [2021-07-13 19:43:47,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:47,214 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 128 transitions. [2021-07-13 19:43:47,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:43:47,214 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:47,214 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:47,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1279,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:47,418 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:47,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:47,418 INFO L82 PathProgramCache]: Analyzing trace with hash -2014354305, now seen corresponding path program 65 times [2021-07-13 19:43:47,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:47,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999986178] [2021-07-13 19:43:47,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:47,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:47,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:47,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:47,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999986178] [2021-07-13 19:43:47,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999986178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:47,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787778988] [2021-07-13 19:43:47,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:47,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:43:47,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:47,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:43:47,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:47,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:47,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787778988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:47,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:47,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:43:47,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789661621] [2021-07-13 19:43:47,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:43:47,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:47,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:43:47,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:43:47,705 INFO L87 Difference]: Start difference. First operand 65 states and 128 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:47,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:47,982 INFO L93 Difference]: Finished difference Result 103 states and 194 transitions. [2021-07-13 19:43:47,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:47,983 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:43:47,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:47,983 INFO L225 Difference]: With dead ends: 103 [2021-07-13 19:43:47,983 INFO L226 Difference]: Without dead ends: 96 [2021-07-13 19:43:47,983 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 338.0ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:47,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-07-13 19:43:47,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 65. [2021-07-13 19:43:47,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.0) internal successors, (128), 64 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:47,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 128 transitions. [2021-07-13 19:43:47,985 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 128 transitions. Word has length 16 [2021-07-13 19:43:47,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:47,985 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 128 transitions. [2021-07-13 19:43:47,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:47,986 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 128 transitions. [2021-07-13 19:43:47,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:43:47,986 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:47,986 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:48,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1286 [2021-07-13 19:43:48,193 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:48,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:48,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1211754831, now seen corresponding path program 66 times [2021-07-13 19:43:48,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:48,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90771936] [2021-07-13 19:43:48,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:48,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:48,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:48,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:48,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90771936] [2021-07-13 19:43:48,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90771936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:48,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231648834] [2021-07-13 19:43:48,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:48,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:43:48,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:48,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:43:48,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:48,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231648834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:48,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:48,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:43:48,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435621455] [2021-07-13 19:43:48,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:48,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:48,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:48,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:48,745 INFO L87 Difference]: Start difference. First operand 65 states and 128 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:48,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:48,926 INFO L93 Difference]: Finished difference Result 85 states and 162 transitions. [2021-07-13 19:43:48,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:48,926 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:43:48,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:48,927 INFO L225 Difference]: With dead ends: 85 [2021-07-13 19:43:48,927 INFO L226 Difference]: Without dead ends: 78 [2021-07-13 19:43:48,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 378.9ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:48,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-07-13 19:43:48,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 67. [2021-07-13 19:43:48,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.015151515151515) internal successors, (133), 66 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:48,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 133 transitions. [2021-07-13 19:43:48,929 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 133 transitions. Word has length 16 [2021-07-13 19:43:48,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:48,929 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 133 transitions. [2021-07-13 19:43:48,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:48,929 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 133 transitions. [2021-07-13 19:43:48,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:43:48,929 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:48,929 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:49,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1301 [2021-07-13 19:43:49,149 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:49,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:49,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1452200979, now seen corresponding path program 67 times [2021-07-13 19:43:49,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:49,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811669287] [2021-07-13 19:43:49,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:49,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:49,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:49,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:49,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811669287] [2021-07-13 19:43:49,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811669287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:49,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395436152] [2021-07-13 19:43:49,470 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:49,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:49,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:43:49,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:49,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:49,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395436152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:49,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:49,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 19:43:49,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948869879] [2021-07-13 19:43:49,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:43:49,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:49,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:43:49,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:49,765 INFO L87 Difference]: Start difference. First operand 67 states and 133 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:49,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:49,979 INFO L93 Difference]: Finished difference Result 89 states and 170 transitions. [2021-07-13 19:43:49,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:49,980 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:43:49,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:49,980 INFO L225 Difference]: With dead ends: 89 [2021-07-13 19:43:49,980 INFO L226 Difference]: Without dead ends: 82 [2021-07-13 19:43:49,980 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 469.9ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:43:49,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-07-13 19:43:49,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 68. [2021-07-13 19:43:49,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.029850746268657) internal successors, (136), 67 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:49,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 136 transitions. [2021-07-13 19:43:49,982 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 136 transitions. Word has length 16 [2021-07-13 19:43:49,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:49,982 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 136 transitions. [2021-07-13 19:43:49,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:49,982 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 136 transitions. [2021-07-13 19:43:49,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:43:49,983 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:49,983 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:50,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1370 [2021-07-13 19:43:50,183 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:50,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:50,184 INFO L82 PathProgramCache]: Analyzing trace with hash 2142273329, now seen corresponding path program 68 times [2021-07-13 19:43:50,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:50,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380217817] [2021-07-13 19:43:50,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:50,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:50,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:50,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:50,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380217817] [2021-07-13 19:43:50,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380217817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:50,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859165357] [2021-07-13 19:43:50,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:50,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:50,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:50,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:43:50,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:50,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:50,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859165357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:50,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:50,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:43:50,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293123082] [2021-07-13 19:43:50,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:43:50,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:50,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:43:50,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:43:50,501 INFO L87 Difference]: Start difference. First operand 68 states and 136 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:50,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:50,694 INFO L93 Difference]: Finished difference Result 101 states and 189 transitions. [2021-07-13 19:43:50,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:50,694 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:43:50,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:50,695 INFO L225 Difference]: With dead ends: 101 [2021-07-13 19:43:50,695 INFO L226 Difference]: Without dead ends: 94 [2021-07-13 19:43:50,695 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 7 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 255.6ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:43:50,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-07-13 19:43:50,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 69. [2021-07-13 19:43:50,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:50,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 140 transitions. [2021-07-13 19:43:50,696 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 140 transitions. Word has length 16 [2021-07-13 19:43:50,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:50,697 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 140 transitions. [2021-07-13 19:43:50,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:50,697 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 140 transitions. [2021-07-13 19:43:50,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:43:50,697 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:50,697 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:50,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1431 [2021-07-13 19:43:50,913 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:50,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:50,913 INFO L82 PathProgramCache]: Analyzing trace with hash -461109331, now seen corresponding path program 69 times [2021-07-13 19:43:50,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:50,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997935671] [2021-07-13 19:43:50,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:50,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:51,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:51,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:51,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997935671] [2021-07-13 19:43:51,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997935671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:51,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011009554] [2021-07-13 19:43:51,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:51,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:43:51,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:51,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:43:51,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:51,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:51,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011009554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:51,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:51,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 19:43:51,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728401299] [2021-07-13 19:43:51,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:43:51,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:51,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:43:51,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:43:51,654 INFO L87 Difference]: Start difference. First operand 69 states and 140 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:51,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:51,919 INFO L93 Difference]: Finished difference Result 89 states and 169 transitions. [2021-07-13 19:43:51,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:51,920 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:43:51,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:51,920 INFO L225 Difference]: With dead ends: 89 [2021-07-13 19:43:51,920 INFO L226 Difference]: Without dead ends: 80 [2021-07-13 19:43:51,920 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 471.6ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:51,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-07-13 19:43:51,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2021-07-13 19:43:51,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 68 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:51,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 139 transitions. [2021-07-13 19:43:51,922 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 139 transitions. Word has length 16 [2021-07-13 19:43:51,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:51,922 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 139 transitions. [2021-07-13 19:43:51,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:51,922 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 139 transitions. [2021-07-13 19:43:51,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:43:51,922 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:51,922 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:52,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1452 [2021-07-13 19:43:52,123 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:52,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:52,123 INFO L82 PathProgramCache]: Analyzing trace with hash -864455657, now seen corresponding path program 70 times [2021-07-13 19:43:52,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:52,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408861832] [2021-07-13 19:43:52,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:52,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:52,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:52,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:52,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408861832] [2021-07-13 19:43:52,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408861832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:52,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949893541] [2021-07-13 19:43:52,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:52,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:52,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:52,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:43:52,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:52,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:52,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949893541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:52,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:52,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:43:52,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098719712] [2021-07-13 19:43:52,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:43:52,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:52,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:43:52,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:43:52,543 INFO L87 Difference]: Start difference. First operand 69 states and 139 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:52,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:52,695 INFO L93 Difference]: Finished difference Result 86 states and 168 transitions. [2021-07-13 19:43:52,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:52,695 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:43:52,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:52,696 INFO L225 Difference]: With dead ends: 86 [2021-07-13 19:43:52,696 INFO L226 Difference]: Without dead ends: 79 [2021-07-13 19:43:52,696 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 318.5ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:43:52,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-07-13 19:43:52,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2021-07-13 19:43:52,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.057142857142857) internal successors, (144), 70 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:52,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 144 transitions. [2021-07-13 19:43:52,697 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 144 transitions. Word has length 16 [2021-07-13 19:43:52,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:52,697 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 144 transitions. [2021-07-13 19:43:52,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:52,697 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 144 transitions. [2021-07-13 19:43:52,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:43:52,698 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:52,698 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:52,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1579,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:52,898 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:52,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:52,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1564948645, now seen corresponding path program 71 times [2021-07-13 19:43:52,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:52,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462752486] [2021-07-13 19:43:52,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:52,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:53,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:53,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:53,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462752486] [2021-07-13 19:43:53,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462752486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:53,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724815823] [2021-07-13 19:43:53,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:53,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:43:53,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:53,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:43:53,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:53,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:53,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724815823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:53,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:53,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:43:53,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518299926] [2021-07-13 19:43:53,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:53,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:53,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:53,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:53,282 INFO L87 Difference]: Start difference. First operand 71 states and 144 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:53,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:53,483 INFO L93 Difference]: Finished difference Result 101 states and 192 transitions. [2021-07-13 19:43:53,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:53,483 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:43:53,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:53,483 INFO L225 Difference]: With dead ends: 101 [2021-07-13 19:43:53,483 INFO L226 Difference]: Without dead ends: 94 [2021-07-13 19:43:53,484 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 323.0ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:53,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-07-13 19:43:53,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 72. [2021-07-13 19:43:53,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.084507042253521) internal successors, (148), 71 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:53,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 148 transitions. [2021-07-13 19:43:53,485 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 148 transitions. Word has length 16 [2021-07-13 19:43:53,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:53,485 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 148 transitions. [2021-07-13 19:43:53,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:53,485 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 148 transitions. [2021-07-13 19:43:53,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:43:53,486 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:53,486 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:53,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1621 [2021-07-13 19:43:53,701 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:53,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:53,701 INFO L82 PathProgramCache]: Analyzing trace with hash 126635991, now seen corresponding path program 72 times [2021-07-13 19:43:53,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:53,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191601303] [2021-07-13 19:43:53,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:53,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:53,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:53,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:53,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191601303] [2021-07-13 19:43:53,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191601303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:53,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371827755] [2021-07-13 19:43:53,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:53,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:43:53,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:53,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:43:53,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:53,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:53,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371827755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:53,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:53,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:43:53,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050630798] [2021-07-13 19:43:53,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:43:53,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:54,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:43:54,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:43:54,000 INFO L87 Difference]: Start difference. First operand 72 states and 148 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:54,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:54,169 INFO L93 Difference]: Finished difference Result 89 states and 174 transitions. [2021-07-13 19:43:54,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:54,169 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:43:54,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:54,170 INFO L225 Difference]: With dead ends: 89 [2021-07-13 19:43:54,170 INFO L226 Difference]: Without dead ends: 82 [2021-07-13 19:43:54,170 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 262.2ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:43:54,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-07-13 19:43:54,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2021-07-13 19:43:54,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.084507042253521) internal successors, (148), 71 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:54,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 148 transitions. [2021-07-13 19:43:54,171 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 148 transitions. Word has length 16 [2021-07-13 19:43:54,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:54,172 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 148 transitions. [2021-07-13 19:43:54,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:54,172 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 148 transitions. [2021-07-13 19:43:54,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:43:54,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:54,172 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:54,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1644,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:54,389 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:54,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:54,389 INFO L82 PathProgramCache]: Analyzing trace with hash -2100178447, now seen corresponding path program 73 times [2021-07-13 19:43:54,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:54,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054100338] [2021-07-13 19:43:54,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:54,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:54,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:54,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:54,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054100338] [2021-07-13 19:43:54,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054100338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:54,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589690520] [2021-07-13 19:43:54,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:54,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:54,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:43:54,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:54,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:54,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589690520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:54,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:54,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:43:54,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639820122] [2021-07-13 19:43:54,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:43:54,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:54,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:43:54,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:43:54,705 INFO L87 Difference]: Start difference. First operand 72 states and 148 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:54,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:54,882 INFO L93 Difference]: Finished difference Result 99 states and 192 transitions. [2021-07-13 19:43:54,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:54,882 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:43:54,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:54,883 INFO L225 Difference]: With dead ends: 99 [2021-07-13 19:43:54,883 INFO L226 Difference]: Without dead ends: 92 [2021-07-13 19:43:54,883 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 302.9ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:43:54,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-13 19:43:54,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 74. [2021-07-13 19:43:54,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.1232876712328768) internal successors, (155), 73 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:54,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 155 transitions. [2021-07-13 19:43:54,884 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 155 transitions. Word has length 16 [2021-07-13 19:43:54,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:54,885 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 155 transitions. [2021-07-13 19:43:54,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:54,885 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 155 transitions. [2021-07-13 19:43:54,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:43:54,885 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:54,885 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:55,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1661 [2021-07-13 19:43:55,093 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:55,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:55,093 INFO L82 PathProgramCache]: Analyzing trace with hash -408593811, now seen corresponding path program 74 times [2021-07-13 19:43:55,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:55,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115783224] [2021-07-13 19:43:55,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:55,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:55,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:55,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:55,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115783224] [2021-07-13 19:43:55,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115783224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:55,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590885061] [2021-07-13 19:43:55,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:55,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:55,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:55,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:43:55,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:55,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:55,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590885061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:55,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:55,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:43:55,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219500903] [2021-07-13 19:43:55,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:55,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:55,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:55,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:55,499 INFO L87 Difference]: Start difference. First operand 74 states and 155 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:55,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:55,675 INFO L93 Difference]: Finished difference Result 101 states and 194 transitions. [2021-07-13 19:43:55,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:55,675 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:43:55,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:55,675 INFO L225 Difference]: With dead ends: 101 [2021-07-13 19:43:55,676 INFO L226 Difference]: Without dead ends: 94 [2021-07-13 19:43:55,676 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 351.2ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:55,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-07-13 19:43:55,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 73. [2021-07-13 19:43:55,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0972222222222223) internal successors, (151), 72 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:55,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 151 transitions. [2021-07-13 19:43:55,677 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 151 transitions. Word has length 16 [2021-07-13 19:43:55,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:55,677 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 151 transitions. [2021-07-13 19:43:55,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:55,677 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 151 transitions. [2021-07-13 19:43:55,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:43:55,677 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:55,677 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:55,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1673 [2021-07-13 19:43:55,878 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:55,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:55,878 INFO L82 PathProgramCache]: Analyzing trace with hash -235346119, now seen corresponding path program 75 times [2021-07-13 19:43:55,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:55,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69565585] [2021-07-13 19:43:55,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:55,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:56,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:56,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:56,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69565585] [2021-07-13 19:43:56,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69565585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:56,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10646478] [2021-07-13 19:43:56,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:56,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:43:56,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:56,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:43:56,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:56,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:56,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10646478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:56,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:56,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:43:56,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264825485] [2021-07-13 19:43:56,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:43:56,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:56,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:43:56,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:43:56,200 INFO L87 Difference]: Start difference. First operand 73 states and 151 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:56,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:56,349 INFO L93 Difference]: Finished difference Result 86 states and 170 transitions. [2021-07-13 19:43:56,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:56,353 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:43:56,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:56,353 INFO L225 Difference]: With dead ends: 86 [2021-07-13 19:43:56,353 INFO L226 Difference]: Without dead ends: 79 [2021-07-13 19:43:56,354 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 297.6ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:43:56,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-07-13 19:43:56,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 73. [2021-07-13 19:43:56,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0972222222222223) internal successors, (151), 72 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:56,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 151 transitions. [2021-07-13 19:43:56,355 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 151 transitions. Word has length 16 [2021-07-13 19:43:56,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:56,355 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 151 transitions. [2021-07-13 19:43:56,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:56,355 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 151 transitions. [2021-07-13 19:43:56,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:43:56,355 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:56,355 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:56,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1686 [2021-07-13 19:43:56,556 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:56,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:56,556 INFO L82 PathProgramCache]: Analyzing trace with hash -305800893, now seen corresponding path program 76 times [2021-07-13 19:43:56,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:56,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82375824] [2021-07-13 19:43:56,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:56,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:56,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:56,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:56,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82375824] [2021-07-13 19:43:56,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82375824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:56,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182707601] [2021-07-13 19:43:56,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:56,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:56,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:56,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:43:56,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:57,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:57,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182707601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:57,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:57,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:43:57,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084501914] [2021-07-13 19:43:57,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:43:57,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:57,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:43:57,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:43:57,034 INFO L87 Difference]: Start difference. First operand 73 states and 151 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:57,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:57,188 INFO L93 Difference]: Finished difference Result 94 states and 187 transitions. [2021-07-13 19:43:57,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:57,188 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:43:57,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:57,189 INFO L225 Difference]: With dead ends: 94 [2021-07-13 19:43:57,189 INFO L226 Difference]: Without dead ends: 87 [2021-07-13 19:43:57,189 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 339.3ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:43:57,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-07-13 19:43:57,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2021-07-13 19:43:57,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.1066666666666665) internal successors, (158), 75 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:57,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 158 transitions. [2021-07-13 19:43:57,194 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 158 transitions. Word has length 16 [2021-07-13 19:43:57,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:57,194 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 158 transitions. [2021-07-13 19:43:57,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:57,194 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 158 transitions. [2021-07-13 19:43:57,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:43:57,195 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:57,195 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:57,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1700,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:57,417 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:57,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:57,417 INFO L82 PathProgramCache]: Analyzing trace with hash -546247041, now seen corresponding path program 77 times [2021-07-13 19:43:57,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:57,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799249912] [2021-07-13 19:43:57,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:57,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:57,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:57,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:57,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799249912] [2021-07-13 19:43:57,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799249912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:57,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023447663] [2021-07-13 19:43:57,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:57,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:57,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:57,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:43:57,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:57,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023447663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:57,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:57,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-13 19:43:57,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809363576] [2021-07-13 19:43:57,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:43:57,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:57,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:43:57,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:43:57,885 INFO L87 Difference]: Start difference. First operand 76 states and 158 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:58,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:58,055 INFO L93 Difference]: Finished difference Result 98 states and 195 transitions. [2021-07-13 19:43:58,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:58,056 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:43:58,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:58,056 INFO L225 Difference]: With dead ends: 98 [2021-07-13 19:43:58,056 INFO L226 Difference]: Without dead ends: 91 [2021-07-13 19:43:58,056 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 355.7ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:43:58,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-07-13 19:43:58,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 77. [2021-07-13 19:43:58,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.1184210526315788) internal successors, (161), 76 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:58,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 161 transitions. [2021-07-13 19:43:58,058 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 161 transitions. Word has length 16 [2021-07-13 19:43:58,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:58,058 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 161 transitions. [2021-07-13 19:43:58,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:58,058 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 161 transitions. [2021-07-13 19:43:58,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:43:58,058 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:58,058 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:58,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1757,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:58,259 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:58,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:58,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1246740029, now seen corresponding path program 78 times [2021-07-13 19:43:58,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:58,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354283498] [2021-07-13 19:43:58,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:58,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:58,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:58,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354283498] [2021-07-13 19:43:58,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354283498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:58,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222061840] [2021-07-13 19:43:58,432 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:58,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:43:58,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:58,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:43:58,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:58,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:58,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222061840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:58,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:58,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:43:58,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580951616] [2021-07-13 19:43:58,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:43:58,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:58,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:43:58,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:43:58,547 INFO L87 Difference]: Start difference. First operand 77 states and 161 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:58,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:58,719 INFO L93 Difference]: Finished difference Result 110 states and 214 transitions. [2021-07-13 19:43:58,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:58,719 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:43:58,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:58,720 INFO L225 Difference]: With dead ends: 110 [2021-07-13 19:43:58,720 INFO L226 Difference]: Without dead ends: 103 [2021-07-13 19:43:58,720 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 259.4ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:43:58,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-07-13 19:43:58,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 78. [2021-07-13 19:43:58,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.142857142857143) internal successors, (165), 77 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:58,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 165 transitions. [2021-07-13 19:43:58,721 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 165 transitions. Word has length 16 [2021-07-13 19:43:58,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:58,722 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 165 transitions. [2021-07-13 19:43:58,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:58,722 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 165 transitions. [2021-07-13 19:43:58,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:43:58,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:58,722 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:58,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1798,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:58,937 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:58,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:58,938 INFO L82 PathProgramCache]: Analyzing trace with hash 444844607, now seen corresponding path program 79 times [2021-07-13 19:43:58,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:58,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643686792] [2021-07-13 19:43:58,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:58,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:59,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:59,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:59,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643686792] [2021-07-13 19:43:59,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643686792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:59,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273650666] [2021-07-13 19:43:59,142 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:59,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:43:59,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:59,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273650666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:59,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:59,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:43:59,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295137100] [2021-07-13 19:43:59,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:43:59,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:59,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:43:59,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:43:59,298 INFO L87 Difference]: Start difference. First operand 78 states and 165 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:59,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:59,468 INFO L93 Difference]: Finished difference Result 98 states and 196 transitions. [2021-07-13 19:43:59,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:59,469 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:43:59,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:59,470 INFO L225 Difference]: With dead ends: 98 [2021-07-13 19:43:59,470 INFO L226 Difference]: Without dead ends: 91 [2021-07-13 19:43:59,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 297.5ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:43:59,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-07-13 19:43:59,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 76. [2021-07-13 19:43:59,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.1066666666666665) internal successors, (158), 75 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:59,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 158 transitions. [2021-07-13 19:43:59,472 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 158 transitions. Word has length 16 [2021-07-13 19:43:59,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:59,472 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 158 transitions. [2021-07-13 19:43:59,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:59,472 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 158 transitions. [2021-07-13 19:43:59,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:43:59,472 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:59,472 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:59,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1813,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:59,677 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:59,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:59,677 INFO L82 PathProgramCache]: Analyzing trace with hash 41498281, now seen corresponding path program 80 times [2021-07-13 19:43:59,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:59,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534762757] [2021-07-13 19:43:59,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:59,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:59,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:59,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534762757] [2021-07-13 19:43:59,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534762757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:59,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783194502] [2021-07-13 19:43:59,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:59,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:59,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:59,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:43:59,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:00,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:00,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783194502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:00,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:00,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:44:00,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282875077] [2021-07-13 19:44:00,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:44:00,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:00,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:44:00,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:44:00,039 INFO L87 Difference]: Start difference. First operand 76 states and 158 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:00,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:00,184 INFO L93 Difference]: Finished difference Result 93 states and 187 transitions. [2021-07-13 19:44:00,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:00,184 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:00,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:00,184 INFO L225 Difference]: With dead ends: 93 [2021-07-13 19:44:00,184 INFO L226 Difference]: Without dead ends: 86 [2021-07-13 19:44:00,185 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 308.2ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:00,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-07-13 19:44:00,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2021-07-13 19:44:00,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.116883116883117) internal successors, (163), 77 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:00,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 163 transitions. [2021-07-13 19:44:00,186 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 163 transitions. Word has length 16 [2021-07-13 19:44:00,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:00,187 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 163 transitions. [2021-07-13 19:44:00,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:00,187 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 163 transitions. [2021-07-13 19:44:00,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:00,187 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:00,187 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:00,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1828,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:00,393 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:00,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:00,393 INFO L82 PathProgramCache]: Analyzing trace with hash -658994707, now seen corresponding path program 81 times [2021-07-13 19:44:00,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:00,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846760990] [2021-07-13 19:44:00,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:00,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:00,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:00,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:00,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846760990] [2021-07-13 19:44:00,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846760990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:00,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964675811] [2021-07-13 19:44:00,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:00,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:44:00,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:00,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:00,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:00,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:00,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964675811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:00,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:00,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:44:00,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514215197] [2021-07-13 19:44:00,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:44:00,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:00,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:44:00,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:44:00,795 INFO L87 Difference]: Start difference. First operand 78 states and 163 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:01,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:01,029 INFO L93 Difference]: Finished difference Result 108 states and 211 transitions. [2021-07-13 19:44:01,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:01,029 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:01,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:01,030 INFO L225 Difference]: With dead ends: 108 [2021-07-13 19:44:01,030 INFO L226 Difference]: Without dead ends: 101 [2021-07-13 19:44:01,030 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 402.9ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:01,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-07-13 19:44:01,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2021-07-13 19:44:01,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.141025641025641) internal successors, (167), 78 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:01,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 167 transitions. [2021-07-13 19:44:01,032 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 167 transitions. Word has length 16 [2021-07-13 19:44:01,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:01,032 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 167 transitions. [2021-07-13 19:44:01,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:01,032 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 167 transitions. [2021-07-13 19:44:01,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:01,032 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:01,032 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:01,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1845 [2021-07-13 19:44:01,246 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:01,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:01,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1032589929, now seen corresponding path program 82 times [2021-07-13 19:44:01,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:01,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497031543] [2021-07-13 19:44:01,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:01,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:01,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:01,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497031543] [2021-07-13 19:44:01,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497031543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:01,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367678916] [2021-07-13 19:44:01,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:01,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:01,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:01,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:01,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:01,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:01,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367678916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:01,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:01,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 19:44:01,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227697386] [2021-07-13 19:44:01,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:01,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:01,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:01,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:01,960 INFO L87 Difference]: Start difference. First operand 79 states and 167 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:02,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:02,139 INFO L93 Difference]: Finished difference Result 96 states and 193 transitions. [2021-07-13 19:44:02,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:02,139 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:02,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:02,139 INFO L225 Difference]: With dead ends: 96 [2021-07-13 19:44:02,140 INFO L226 Difference]: Without dead ends: 89 [2021-07-13 19:44:02,140 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 345.1ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:02,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-07-13 19:44:02,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 77. [2021-07-13 19:44:02,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 76 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:02,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 160 transitions. [2021-07-13 19:44:02,141 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 160 transitions. Word has length 16 [2021-07-13 19:44:02,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:02,141 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 160 transitions. [2021-07-13 19:44:02,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:02,141 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 160 transitions. [2021-07-13 19:44:02,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:02,141 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:02,141 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:02,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1864,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:02,342 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:02,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:02,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1194224509, now seen corresponding path program 83 times [2021-07-13 19:44:02,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:02,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719220223] [2021-07-13 19:44:02,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:02,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:02,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:02,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:02,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719220223] [2021-07-13 19:44:02,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719220223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:02,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916775704] [2021-07-13 19:44:02,553 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:02,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:44:02,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:02,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:02,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:02,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:02,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916775704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:02,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:02,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 19:44:02,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115710845] [2021-07-13 19:44:02,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:02,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:02,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:02,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:02,825 INFO L87 Difference]: Start difference. First operand 77 states and 160 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:03,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:03,031 INFO L93 Difference]: Finished difference Result 104 states and 204 transitions. [2021-07-13 19:44:03,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:03,032 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:03,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:03,032 INFO L225 Difference]: With dead ends: 104 [2021-07-13 19:44:03,032 INFO L226 Difference]: Without dead ends: 97 [2021-07-13 19:44:03,032 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 390.1ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:03,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-07-13 19:44:03,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 79. [2021-07-13 19:44:03,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.141025641025641) internal successors, (167), 78 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:03,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 167 transitions. [2021-07-13 19:44:03,033 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 167 transitions. Word has length 16 [2021-07-13 19:44:03,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:03,034 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 167 transitions. [2021-07-13 19:44:03,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:03,034 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 167 transitions. [2021-07-13 19:44:03,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:03,034 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:03,034 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:03,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2013 [2021-07-13 19:44:03,235 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:03,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:03,235 INFO L82 PathProgramCache]: Analyzing trace with hash 497360127, now seen corresponding path program 84 times [2021-07-13 19:44:03,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:03,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605866816] [2021-07-13 19:44:03,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:03,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:03,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:03,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:03,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605866816] [2021-07-13 19:44:03,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605866816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:03,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972760407] [2021-07-13 19:44:03,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:03,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:44:03,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:03,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:03,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:03,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:03,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972760407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:03,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:03,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:44:03,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461529692] [2021-07-13 19:44:03,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:44:03,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:03,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:44:03,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:44:03,538 INFO L87 Difference]: Start difference. First operand 79 states and 167 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:03,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:03,709 INFO L93 Difference]: Finished difference Result 106 states and 206 transitions. [2021-07-13 19:44:03,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:03,710 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:03,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:03,710 INFO L225 Difference]: With dead ends: 106 [2021-07-13 19:44:03,710 INFO L226 Difference]: Without dead ends: 99 [2021-07-13 19:44:03,710 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 253.4ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:03,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-07-13 19:44:03,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 78. [2021-07-13 19:44:03,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.116883116883117) internal successors, (163), 77 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:03,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 163 transitions. [2021-07-13 19:44:03,712 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 163 transitions. Word has length 16 [2021-07-13 19:44:03,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:03,712 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 163 transitions. [2021-07-13 19:44:03,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:03,712 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 163 transitions. [2021-07-13 19:44:03,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:03,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:03,712 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:03,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2048 [2021-07-13 19:44:03,925 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:03,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:03,925 INFO L82 PathProgramCache]: Analyzing trace with hash 670607819, now seen corresponding path program 85 times [2021-07-13 19:44:03,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:03,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396604460] [2021-07-13 19:44:03,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:03,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:04,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:04,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396604460] [2021-07-13 19:44:04,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396604460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:04,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979757533] [2021-07-13 19:44:04,096 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:04,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:04,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:04,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:04,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979757533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:04,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:04,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:44:04,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031955302] [2021-07-13 19:44:04,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:44:04,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:04,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:44:04,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:44:04,250 INFO L87 Difference]: Start difference. First operand 78 states and 163 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:04,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:04,426 INFO L93 Difference]: Finished difference Result 91 states and 182 transitions. [2021-07-13 19:44:04,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:04,426 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:04,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:04,426 INFO L225 Difference]: With dead ends: 91 [2021-07-13 19:44:04,426 INFO L226 Difference]: Without dead ends: 84 [2021-07-13 19:44:04,426 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 275.2ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:04,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-07-13 19:44:04,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2021-07-13 19:44:04,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.1066666666666665) internal successors, (158), 75 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:04,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 158 transitions. [2021-07-13 19:44:04,428 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 158 transitions. Word has length 16 [2021-07-13 19:44:04,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:04,428 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 158 transitions. [2021-07-13 19:44:04,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:04,428 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 158 transitions. [2021-07-13 19:44:04,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:04,428 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:04,428 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:04,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2058 [2021-07-13 19:44:04,633 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:04,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:04,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1081734079, now seen corresponding path program 86 times [2021-07-13 19:44:04,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:04,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153367551] [2021-07-13 19:44:04,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:04,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:04,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:04,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153367551] [2021-07-13 19:44:04,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153367551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:04,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084973493] [2021-07-13 19:44:04,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:04,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:04,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:04,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:04,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:04,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:04,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084973493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:04,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:04,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:44:04,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591106417] [2021-07-13 19:44:04,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:44:04,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:04,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:44:04,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:44:04,999 INFO L87 Difference]: Start difference. First operand 76 states and 158 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:05,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:05,154 INFO L93 Difference]: Finished difference Result 94 states and 189 transitions. [2021-07-13 19:44:05,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:05,154 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:05,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:05,155 INFO L225 Difference]: With dead ends: 94 [2021-07-13 19:44:05,155 INFO L226 Difference]: Without dead ends: 87 [2021-07-13 19:44:05,155 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 299.7ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:05,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-07-13 19:44:05,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2021-07-13 19:44:05,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1153846153846154) internal successors, (165), 78 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:05,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 165 transitions. [2021-07-13 19:44:05,156 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 165 transitions. Word has length 16 [2021-07-13 19:44:05,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:05,157 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 165 transitions. [2021-07-13 19:44:05,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:05,157 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 165 transitions. [2021-07-13 19:44:05,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:05,157 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:05,157 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:05,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2075,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:05,358 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:05,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:05,358 INFO L82 PathProgramCache]: Analyzing trace with hash 381241091, now seen corresponding path program 87 times [2021-07-13 19:44:05,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:05,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435301022] [2021-07-13 19:44:05,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:05,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:05,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:05,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:05,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435301022] [2021-07-13 19:44:05,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435301022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:05,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163067503] [2021-07-13 19:44:05,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:05,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:44:05,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:05,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:05,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:06,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:06,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163067503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:06,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:06,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 19:44:06,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909830885] [2021-07-13 19:44:06,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:06,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:06,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:06,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:06,151 INFO L87 Difference]: Start difference. First operand 79 states and 165 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:06,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:06,323 INFO L93 Difference]: Finished difference Result 109 states and 213 transitions. [2021-07-13 19:44:06,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:06,324 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:06,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:06,324 INFO L225 Difference]: With dead ends: 109 [2021-07-13 19:44:06,324 INFO L226 Difference]: Without dead ends: 102 [2021-07-13 19:44:06,324 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 383.4ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:44:06,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-07-13 19:44:06,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 80. [2021-07-13 19:44:06,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:06,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-07-13 19:44:06,325 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 16 [2021-07-13 19:44:06,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:06,326 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-07-13 19:44:06,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:06,326 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-07-13 19:44:06,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:06,326 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:06,326 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:06,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2107 [2021-07-13 19:44:06,526 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:06,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:06,527 INFO L82 PathProgramCache]: Analyzing trace with hash 2072825727, now seen corresponding path program 88 times [2021-07-13 19:44:06,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:06,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164700999] [2021-07-13 19:44:06,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:06,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:06,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:06,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:06,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164700999] [2021-07-13 19:44:06,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164700999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:06,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623208668] [2021-07-13 19:44:06,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:06,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:06,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:06,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:06,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:06,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:06,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623208668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:06,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:06,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-13 19:44:06,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086951003] [2021-07-13 19:44:06,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:44:06,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:06,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:44:06,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:06,913 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:07,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:07,154 INFO L93 Difference]: Finished difference Result 97 states and 195 transitions. [2021-07-13 19:44:07,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:07,154 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:07,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:07,155 INFO L225 Difference]: With dead ends: 97 [2021-07-13 19:44:07,155 INFO L226 Difference]: Without dead ends: 90 [2021-07-13 19:44:07,155 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 394.1ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:07,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-07-13 19:44:07,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2021-07-13 19:44:07,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.103896103896104) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:07,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 162 transitions. [2021-07-13 19:44:07,156 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 162 transitions. Word has length 16 [2021-07-13 19:44:07,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:07,156 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 162 transitions. [2021-07-13 19:44:07,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:07,156 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 162 transitions. [2021-07-13 19:44:07,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:07,156 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:07,156 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:07,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2278 [2021-07-13 19:44:07,358 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:07,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:07,358 INFO L82 PathProgramCache]: Analyzing trace with hash -153988711, now seen corresponding path program 89 times [2021-07-13 19:44:07,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:07,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440838120] [2021-07-13 19:44:07,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:07,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:07,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:07,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440838120] [2021-07-13 19:44:07,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440838120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:07,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39353378] [2021-07-13 19:44:07,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:07,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:44:07,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:07,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:07,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:07,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:07,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39353378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:07,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:07,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:44:07,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63997368] [2021-07-13 19:44:07,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:44:07,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:07,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:44:07,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:44:07,696 INFO L87 Difference]: Start difference. First operand 78 states and 162 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:07,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:07,911 INFO L93 Difference]: Finished difference Result 105 states and 206 transitions. [2021-07-13 19:44:07,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:07,912 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:07,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:07,912 INFO L225 Difference]: With dead ends: 105 [2021-07-13 19:44:07,912 INFO L226 Difference]: Without dead ends: 98 [2021-07-13 19:44:07,912 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 366.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:07,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-07-13 19:44:07,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 80. [2021-07-13 19:44:07,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:07,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-07-13 19:44:07,914 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 16 [2021-07-13 19:44:07,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:07,914 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-07-13 19:44:07,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:07,914 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-07-13 19:44:07,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:07,915 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:07,915 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:08,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2304,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:08,121 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:08,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:08,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1537595925, now seen corresponding path program 90 times [2021-07-13 19:44:08,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:08,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774971335] [2021-07-13 19:44:08,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:08,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:08,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:08,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:08,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774971335] [2021-07-13 19:44:08,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774971335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:08,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616386985] [2021-07-13 19:44:08,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:08,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:44:08,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:08,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:08,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:08,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:08,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616386985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:08,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:08,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 19:44:08,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133670122] [2021-07-13 19:44:08,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:08,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:08,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:08,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:08,697 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:08,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:08,952 INFO L93 Difference]: Finished difference Result 107 states and 208 transitions. [2021-07-13 19:44:08,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:08,952 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:08,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:08,953 INFO L225 Difference]: With dead ends: 107 [2021-07-13 19:44:08,953 INFO L226 Difference]: Without dead ends: 100 [2021-07-13 19:44:08,953 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 547.8ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:44:08,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-07-13 19:44:08,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 79. [2021-07-13 19:44:08,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1153846153846154) internal successors, (165), 78 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:08,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 165 transitions. [2021-07-13 19:44:08,954 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 165 transitions. Word has length 16 [2021-07-13 19:44:08,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:08,955 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 165 transitions. [2021-07-13 19:44:08,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:08,955 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 165 transitions. [2021-07-13 19:44:08,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:08,955 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:08,955 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:09,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2317 [2021-07-13 19:44:09,169 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:09,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:09,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1710843617, now seen corresponding path program 91 times [2021-07-13 19:44:09,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:09,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639514850] [2021-07-13 19:44:09,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:09,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:09,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:09,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:09,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639514850] [2021-07-13 19:44:09,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639514850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:09,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863442750] [2021-07-13 19:44:09,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:09,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:09,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:09,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:09,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:09,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863442750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:09,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:09,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 19:44:09,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591394231] [2021-07-13 19:44:09,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:09,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:09,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:09,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:09,871 INFO L87 Difference]: Start difference. First operand 79 states and 165 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:10,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:10,124 INFO L93 Difference]: Finished difference Result 92 states and 184 transitions. [2021-07-13 19:44:10,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:10,125 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:10,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:10,125 INFO L225 Difference]: With dead ends: 92 [2021-07-13 19:44:10,125 INFO L226 Difference]: Without dead ends: 85 [2021-07-13 19:44:10,125 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 588.8ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:44:10,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-07-13 19:44:10,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 77. [2021-07-13 19:44:10,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 76 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:10,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 160 transitions. [2021-07-13 19:44:10,134 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 160 transitions. Word has length 16 [2021-07-13 19:44:10,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:10,134 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 160 transitions. [2021-07-13 19:44:10,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:10,134 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 160 transitions. [2021-07-13 19:44:10,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:10,135 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:10,135 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:10,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2351,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:10,341 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:10,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:10,341 INFO L82 PathProgramCache]: Analyzing trace with hash 433756611, now seen corresponding path program 92 times [2021-07-13 19:44:10,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:10,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943348067] [2021-07-13 19:44:10,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:10,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:10,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:10,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:10,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943348067] [2021-07-13 19:44:10,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943348067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:10,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598200844] [2021-07-13 19:44:10,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:10,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:10,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:10,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:10,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:10,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:10,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598200844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:10,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:10,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:44:10,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288330494] [2021-07-13 19:44:10,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:44:10,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:10,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:44:10,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:44:10,654 INFO L87 Difference]: Start difference. First operand 77 states and 160 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:10,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:10,850 INFO L93 Difference]: Finished difference Result 107 states and 210 transitions. [2021-07-13 19:44:10,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:10,850 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:10,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:10,851 INFO L225 Difference]: With dead ends: 107 [2021-07-13 19:44:10,851 INFO L226 Difference]: Without dead ends: 100 [2021-07-13 19:44:10,851 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 257.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:10,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-07-13 19:44:10,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 80. [2021-07-13 19:44:10,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.151898734177215) internal successors, (170), 79 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:10,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 170 transitions. [2021-07-13 19:44:10,852 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 170 transitions. Word has length 16 [2021-07-13 19:44:10,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:10,852 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 170 transitions. [2021-07-13 19:44:10,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:10,852 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 170 transitions. [2021-07-13 19:44:10,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:10,852 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:10,852 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:11,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2385,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:11,053 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:11,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:11,053 INFO L82 PathProgramCache]: Analyzing trace with hash 2125341247, now seen corresponding path program 93 times [2021-07-13 19:44:11,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:11,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711756479] [2021-07-13 19:44:11,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:11,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:11,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:11,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:11,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711756479] [2021-07-13 19:44:11,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711756479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:11,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011040286] [2021-07-13 19:44:11,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:11,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:44:11,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:11,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:11,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:11,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:11,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011040286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:11,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:11,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:44:11,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128138523] [2021-07-13 19:44:11,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:44:11,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:11,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:44:11,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:44:11,395 INFO L87 Difference]: Start difference. First operand 80 states and 170 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:11,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:11,551 INFO L93 Difference]: Finished difference Result 109 states and 212 transitions. [2021-07-13 19:44:11,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:11,551 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:11,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:11,552 INFO L225 Difference]: With dead ends: 109 [2021-07-13 19:44:11,552 INFO L226 Difference]: Without dead ends: 102 [2021-07-13 19:44:11,552 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 286.9ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:11,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-07-13 19:44:11,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 79. [2021-07-13 19:44:11,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.128205128205128) internal successors, (166), 78 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:11,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 166 transitions. [2021-07-13 19:44:11,554 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 166 transitions. Word has length 16 [2021-07-13 19:44:11,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:11,554 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 166 transitions. [2021-07-13 19:44:11,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:11,554 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 166 transitions. [2021-07-13 19:44:11,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:11,554 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:11,554 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:11,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2396,97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:11,765 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:11,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:11,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1996378357, now seen corresponding path program 94 times [2021-07-13 19:44:11,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:11,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837765587] [2021-07-13 19:44:11,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:11,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:11,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:11,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837765587] [2021-07-13 19:44:11,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837765587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:11,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598857237] [2021-07-13 19:44:11,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:11,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:11,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:11,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:11,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:12,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:12,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598857237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:12,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:12,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:44:12,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656875643] [2021-07-13 19:44:12,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:44:12,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:12,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:44:12,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:44:12,099 INFO L87 Difference]: Start difference. First operand 79 states and 166 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:12,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:12,244 INFO L93 Difference]: Finished difference Result 96 states and 191 transitions. [2021-07-13 19:44:12,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:12,244 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:12,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:12,245 INFO L225 Difference]: With dead ends: 96 [2021-07-13 19:44:12,245 INFO L226 Difference]: Without dead ends: 89 [2021-07-13 19:44:12,245 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 7 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 285.2ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:12,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-07-13 19:44:12,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2021-07-13 19:44:12,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.116883116883117) internal successors, (163), 77 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:12,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 163 transitions. [2021-07-13 19:44:12,246 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 163 transitions. Word has length 16 [2021-07-13 19:44:12,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:12,246 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 163 transitions. [2021-07-13 19:44:12,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:12,246 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 163 transitions. [2021-07-13 19:44:12,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:12,246 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:12,246 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:12,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2410 [2021-07-13 19:44:12,447 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:12,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:12,447 INFO L82 PathProgramCache]: Analyzing trace with hash -920667201, now seen corresponding path program 95 times [2021-07-13 19:44:12,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:12,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018627958] [2021-07-13 19:44:12,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:12,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:12,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:12,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018627958] [2021-07-13 19:44:12,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018627958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:12,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227875369] [2021-07-13 19:44:12,741 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:12,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:12,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:12,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:12,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:12,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:12,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227875369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:12,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:12,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:44:12,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269044344] [2021-07-13 19:44:12,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:44:12,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:12,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:44:12,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:44:12,876 INFO L87 Difference]: Start difference. First operand 78 states and 163 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:13,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:13,039 INFO L93 Difference]: Finished difference Result 93 states and 185 transitions. [2021-07-13 19:44:13,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:13,040 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:13,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:13,040 INFO L225 Difference]: With dead ends: 93 [2021-07-13 19:44:13,040 INFO L226 Difference]: Without dead ends: 86 [2021-07-13 19:44:13,040 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 399.6ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:13,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-07-13 19:44:13,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2021-07-13 19:44:13,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 79 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:13,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 166 transitions. [2021-07-13 19:44:13,045 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 166 transitions. Word has length 16 [2021-07-13 19:44:13,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:13,045 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 166 transitions. [2021-07-13 19:44:13,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:13,045 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 166 transitions. [2021-07-13 19:44:13,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:13,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:13,046 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:13,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2426,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:13,268 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:13,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:13,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1178102735, now seen corresponding path program 96 times [2021-07-13 19:44:13,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:13,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315785966] [2021-07-13 19:44:13,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:13,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:13,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:13,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:13,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315785966] [2021-07-13 19:44:13,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315785966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:13,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787394857] [2021-07-13 19:44:13,488 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:13,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:44:13,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:13,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:13,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:13,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:13,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787394857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:13,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:13,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:44:13,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561496867] [2021-07-13 19:44:13,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:44:13,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:13,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:44:13,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:44:13,647 INFO L87 Difference]: Start difference. First operand 80 states and 166 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:13,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:13,802 INFO L93 Difference]: Finished difference Result 100 states and 200 transitions. [2021-07-13 19:44:13,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:13,802 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:13,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:13,803 INFO L225 Difference]: With dead ends: 100 [2021-07-13 19:44:13,803 INFO L226 Difference]: Without dead ends: 93 [2021-07-13 19:44:13,803 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 320.4ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:13,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-07-13 19:44:13,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2021-07-13 19:44:13,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.1125) internal successors, (169), 80 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:13,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 169 transitions. [2021-07-13 19:44:13,804 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 169 transitions. Word has length 16 [2021-07-13 19:44:13,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:13,804 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 169 transitions. [2021-07-13 19:44:13,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:13,805 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 169 transitions. [2021-07-13 19:44:13,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:13,805 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:13,805 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:14,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2441 [2021-07-13 19:44:14,025 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:14,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:14,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1418548883, now seen corresponding path program 97 times [2021-07-13 19:44:14,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:14,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676184288] [2021-07-13 19:44:14,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:14,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:14,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:14,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:14,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676184288] [2021-07-13 19:44:14,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676184288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:14,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740367682] [2021-07-13 19:44:14,233 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:14,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:14,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:14,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:14,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:14,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740367682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:14,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:14,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-13 19:44:14,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723467541] [2021-07-13 19:44:14,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:44:14,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:14,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:44:14,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:14,405 INFO L87 Difference]: Start difference. First operand 81 states and 169 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:14,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:14,566 INFO L93 Difference]: Finished difference Result 104 states and 208 transitions. [2021-07-13 19:44:14,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:14,566 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:14,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:14,566 INFO L225 Difference]: With dead ends: 104 [2021-07-13 19:44:14,566 INFO L226 Difference]: Without dead ends: 97 [2021-07-13 19:44:14,566 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 343.6ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:14,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-07-13 19:44:14,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 82. [2021-07-13 19:44:14,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.123456790123457) internal successors, (172), 81 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:14,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 172 transitions. [2021-07-13 19:44:14,568 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 172 transitions. Word has length 16 [2021-07-13 19:44:14,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:14,568 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 172 transitions. [2021-07-13 19:44:14,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:14,568 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 172 transitions. [2021-07-13 19:44:14,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:14,568 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:14,568 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:14,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2474 [2021-07-13 19:44:14,773 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:14,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:14,773 INFO L82 PathProgramCache]: Analyzing trace with hash -2119041871, now seen corresponding path program 98 times [2021-07-13 19:44:14,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:14,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094934722] [2021-07-13 19:44:14,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:14,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:14,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:14,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:14,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094934722] [2021-07-13 19:44:14,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094934722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:14,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650342773] [2021-07-13 19:44:14,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:14,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:14,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:14,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:14,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:15,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:15,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650342773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:15,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:15,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:44:15,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937254143] [2021-07-13 19:44:15,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:44:15,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:15,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:44:15,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:44:15,038 INFO L87 Difference]: Start difference. First operand 82 states and 172 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:15,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:15,209 INFO L93 Difference]: Finished difference Result 116 states and 227 transitions. [2021-07-13 19:44:15,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:15,210 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:15,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:15,210 INFO L225 Difference]: With dead ends: 116 [2021-07-13 19:44:15,210 INFO L226 Difference]: Without dead ends: 109 [2021-07-13 19:44:15,210 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 238.5ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:15,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-07-13 19:44:15,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 83. [2021-07-13 19:44:15,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1463414634146343) internal successors, (176), 82 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:15,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 176 transitions. [2021-07-13 19:44:15,211 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 176 transitions. Word has length 16 [2021-07-13 19:44:15,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:15,212 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 176 transitions. [2021-07-13 19:44:15,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:15,212 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 176 transitions. [2021-07-13 19:44:15,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:15,212 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:15,212 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:15,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2495,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:15,416 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:15,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:15,416 INFO L82 PathProgramCache]: Analyzing trace with hash -427457235, now seen corresponding path program 99 times [2021-07-13 19:44:15,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:15,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715176043] [2021-07-13 19:44:15,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:15,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:15,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:15,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:15,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715176043] [2021-07-13 19:44:15,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715176043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:15,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588896623] [2021-07-13 19:44:15,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:15,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:44:15,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:15,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:15,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:15,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:15,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588896623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:15,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:15,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:44:15,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708213181] [2021-07-13 19:44:15,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:44:15,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:15,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:44:15,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:44:15,764 INFO L87 Difference]: Start difference. First operand 83 states and 176 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:16,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:16,004 INFO L93 Difference]: Finished difference Result 104 states and 209 transitions. [2021-07-13 19:44:16,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:16,004 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:16,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:16,005 INFO L225 Difference]: With dead ends: 104 [2021-07-13 19:44:16,005 INFO L226 Difference]: Without dead ends: 97 [2021-07-13 19:44:16,005 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 329.7ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:16,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-07-13 19:44:16,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 80. [2021-07-13 19:44:16,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 79 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:16,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 166 transitions. [2021-07-13 19:44:16,007 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 166 transitions. Word has length 16 [2021-07-13 19:44:16,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:16,007 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 166 transitions. [2021-07-13 19:44:16,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:16,007 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 166 transitions. [2021-07-13 19:44:16,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:16,007 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:16,007 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:16,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2510 [2021-07-13 19:44:16,208 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:16,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:16,208 INFO L82 PathProgramCache]: Analyzing trace with hash -830803561, now seen corresponding path program 100 times [2021-07-13 19:44:16,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:16,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987574719] [2021-07-13 19:44:16,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:16,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:16,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:16,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:16,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987574719] [2021-07-13 19:44:16,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987574719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:16,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59037329] [2021-07-13 19:44:16,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:16,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:16,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:16,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:16,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:16,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:16,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59037329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:16,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:16,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:44:16,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717721988] [2021-07-13 19:44:16,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:44:16,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:16,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:44:16,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:44:16,596 INFO L87 Difference]: Start difference. First operand 80 states and 166 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:16,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:16,739 INFO L93 Difference]: Finished difference Result 98 states and 197 transitions. [2021-07-13 19:44:16,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:16,739 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:16,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:16,740 INFO L225 Difference]: With dead ends: 98 [2021-07-13 19:44:16,740 INFO L226 Difference]: Without dead ends: 91 [2021-07-13 19:44:16,740 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 320.5ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:16,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-07-13 19:44:16,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2021-07-13 19:44:16,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.111111111111111) internal successors, (171), 81 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:16,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 171 transitions. [2021-07-13 19:44:16,741 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 171 transitions. Word has length 16 [2021-07-13 19:44:16,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:16,741 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 171 transitions. [2021-07-13 19:44:16,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:16,742 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 171 transitions. [2021-07-13 19:44:16,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:16,742 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:16,742 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:16,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2525 [2021-07-13 19:44:16,957 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:16,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:16,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1531296549, now seen corresponding path program 101 times [2021-07-13 19:44:16,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:16,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019938280] [2021-07-13 19:44:16,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:16,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:17,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:17,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:17,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019938280] [2021-07-13 19:44:17,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019938280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:17,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536569270] [2021-07-13 19:44:17,163 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:17,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:44:17,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:17,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:17,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:17,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:17,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536569270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:17,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:17,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:44:17,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335417996] [2021-07-13 19:44:17,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:44:17,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:17,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:44:17,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:44:17,293 INFO L87 Difference]: Start difference. First operand 82 states and 171 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:17,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:17,527 INFO L93 Difference]: Finished difference Result 113 states and 221 transitions. [2021-07-13 19:44:17,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:17,528 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:17,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:17,528 INFO L225 Difference]: With dead ends: 113 [2021-07-13 19:44:17,528 INFO L226 Difference]: Without dead ends: 106 [2021-07-13 19:44:17,528 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 366.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:17,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-07-13 19:44:17,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 83. [2021-07-13 19:44:17,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1341463414634148) internal successors, (175), 82 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:17,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 175 transitions. [2021-07-13 19:44:17,530 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 175 transitions. Word has length 16 [2021-07-13 19:44:17,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:17,530 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 175 transitions. [2021-07-13 19:44:17,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:17,530 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 175 transitions. [2021-07-13 19:44:17,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:17,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:17,530 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:17,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2549 [2021-07-13 19:44:17,745 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:17,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:17,745 INFO L82 PathProgramCache]: Analyzing trace with hash 160288087, now seen corresponding path program 102 times [2021-07-13 19:44:17,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:17,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822628054] [2021-07-13 19:44:17,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:17,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:17,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:17,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:17,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822628054] [2021-07-13 19:44:17,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822628054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:17,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602082953] [2021-07-13 19:44:17,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:18,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:44:18,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:18,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:18,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:18,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:18,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602082953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:18,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:18,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 19:44:18,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165956308] [2021-07-13 19:44:18,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:18,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:18,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:18,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:18,507 INFO L87 Difference]: Start difference. First operand 83 states and 175 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:18,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:18,693 INFO L93 Difference]: Finished difference Result 101 states and 203 transitions. [2021-07-13 19:44:18,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:18,694 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:18,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:18,694 INFO L225 Difference]: With dead ends: 101 [2021-07-13 19:44:18,694 INFO L226 Difference]: Without dead ends: 94 [2021-07-13 19:44:18,694 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 386.7ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:18,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-07-13 19:44:18,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 81. [2021-07-13 19:44:18,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.1) internal successors, (168), 80 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:18,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 168 transitions. [2021-07-13 19:44:18,695 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 168 transitions. Word has length 16 [2021-07-13 19:44:18,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:18,695 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 168 transitions. [2021-07-13 19:44:18,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:18,696 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 168 transitions. [2021-07-13 19:44:18,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:18,696 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:18,696 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:18,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2568 [2021-07-13 19:44:18,896 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:18,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:18,897 INFO L82 PathProgramCache]: Analyzing trace with hash -2066526351, now seen corresponding path program 103 times [2021-07-13 19:44:18,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:18,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624710348] [2021-07-13 19:44:18,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:18,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:19,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:19,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:19,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624710348] [2021-07-13 19:44:19,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624710348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:19,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35881322] [2021-07-13 19:44:19,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:19,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:19,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:19,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:19,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:19,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35881322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:19,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:19,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 19:44:19,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827156683] [2021-07-13 19:44:19,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:19,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:19,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:19,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:19,365 INFO L87 Difference]: Start difference. First operand 81 states and 168 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:19,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:19,563 INFO L93 Difference]: Finished difference Result 109 states and 214 transitions. [2021-07-13 19:44:19,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:19,563 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:19,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:19,564 INFO L225 Difference]: With dead ends: 109 [2021-07-13 19:44:19,564 INFO L226 Difference]: Without dead ends: 102 [2021-07-13 19:44:19,564 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 388.9ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:19,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-07-13 19:44:19,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 83. [2021-07-13 19:44:19,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1341463414634148) internal successors, (175), 82 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:19,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 175 transitions. [2021-07-13 19:44:19,565 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 175 transitions. Word has length 16 [2021-07-13 19:44:19,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:19,565 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 175 transitions. [2021-07-13 19:44:19,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:19,565 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 175 transitions. [2021-07-13 19:44:19,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:19,565 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:19,565 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:19,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2695,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:19,766 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:19,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:19,766 INFO L82 PathProgramCache]: Analyzing trace with hash -374941715, now seen corresponding path program 104 times [2021-07-13 19:44:19,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:19,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216660284] [2021-07-13 19:44:19,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:19,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:19,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:19,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:19,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216660284] [2021-07-13 19:44:19,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216660284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:19,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208582875] [2021-07-13 19:44:19,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:19,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:19,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:19,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:19,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:20,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:20,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208582875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:20,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:20,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:44:20,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067144628] [2021-07-13 19:44:20,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:44:20,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:20,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:44:20,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:44:20,073 INFO L87 Difference]: Start difference. First operand 83 states and 175 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:20,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:20,242 INFO L93 Difference]: Finished difference Result 111 states and 216 transitions. [2021-07-13 19:44:20,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:20,242 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:20,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:20,242 INFO L225 Difference]: With dead ends: 111 [2021-07-13 19:44:20,242 INFO L226 Difference]: Without dead ends: 104 [2021-07-13 19:44:20,243 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 271.4ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:20,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-07-13 19:44:20,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 82. [2021-07-13 19:44:20,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.111111111111111) internal successors, (171), 81 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:20,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 171 transitions. [2021-07-13 19:44:20,244 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 171 transitions. Word has length 16 [2021-07-13 19:44:20,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:20,244 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 171 transitions. [2021-07-13 19:44:20,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:20,244 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 171 transitions. [2021-07-13 19:44:20,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:20,244 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:20,244 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:20,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2729,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:20,445 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:20,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:20,445 INFO L82 PathProgramCache]: Analyzing trace with hash -201694023, now seen corresponding path program 105 times [2021-07-13 19:44:20,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:20,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629428027] [2021-07-13 19:44:20,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:20,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:20,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:20,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629428027] [2021-07-13 19:44:20,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629428027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:20,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410233144] [2021-07-13 19:44:20,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:20,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:44:20,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:20,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:20,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:20,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:20,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410233144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:20,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:20,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:44:20,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024662306] [2021-07-13 19:44:20,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:44:20,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:20,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:44:20,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:44:20,757 INFO L87 Difference]: Start difference. First operand 82 states and 171 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:20,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:20,915 INFO L93 Difference]: Finished difference Result 96 states and 192 transitions. [2021-07-13 19:44:20,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:20,915 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:20,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:20,915 INFO L225 Difference]: With dead ends: 96 [2021-07-13 19:44:20,915 INFO L226 Difference]: Without dead ends: 89 [2021-07-13 19:44:20,915 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 286.7ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:20,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-07-13 19:44:20,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2021-07-13 19:44:20,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 78 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:20,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 164 transitions. [2021-07-13 19:44:20,927 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 164 transitions. Word has length 16 [2021-07-13 19:44:20,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:20,927 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 164 transitions. [2021-07-13 19:44:20,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:20,928 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 164 transitions. [2021-07-13 19:44:20,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:20,928 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:20,928 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:21,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2740,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:21,129 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:21,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:21,130 INFO L82 PathProgramCache]: Analyzing trace with hash 209432237, now seen corresponding path program 106 times [2021-07-13 19:44:21,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:21,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155064302] [2021-07-13 19:44:21,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:21,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:21,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:21,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:21,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155064302] [2021-07-13 19:44:21,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155064302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:21,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456000581] [2021-07-13 19:44:21,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:21,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:21,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:21,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:21,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:21,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:21,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456000581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:21,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:21,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:44:21,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186409934] [2021-07-13 19:44:21,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:44:21,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:21,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:44:21,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:44:21,523 INFO L87 Difference]: Start difference. First operand 79 states and 164 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:21,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:21,700 INFO L93 Difference]: Finished difference Result 98 states and 197 transitions. [2021-07-13 19:44:21,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:21,700 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:21,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:21,701 INFO L225 Difference]: With dead ends: 98 [2021-07-13 19:44:21,701 INFO L226 Difference]: Without dead ends: 91 [2021-07-13 19:44:21,701 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 321.3ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:21,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-07-13 19:44:21,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2021-07-13 19:44:21,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.111111111111111) internal successors, (171), 81 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:21,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 171 transitions. [2021-07-13 19:44:21,702 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 171 transitions. Word has length 16 [2021-07-13 19:44:21,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:21,702 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 171 transitions. [2021-07-13 19:44:21,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:21,702 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 171 transitions. [2021-07-13 19:44:21,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:21,702 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:21,702 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:21,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2755 [2021-07-13 19:44:21,905 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:21,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:21,905 INFO L82 PathProgramCache]: Analyzing trace with hash -491060751, now seen corresponding path program 107 times [2021-07-13 19:44:21,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:21,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650108815] [2021-07-13 19:44:21,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:21,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:22,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:22,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:22,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650108815] [2021-07-13 19:44:22,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650108815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:22,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419409393] [2021-07-13 19:44:22,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:22,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:44:22,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:22,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:22,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:22,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:22,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419409393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:22,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:22,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 19:44:22,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342549127] [2021-07-13 19:44:22,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:22,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:22,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:22,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:22,600 INFO L87 Difference]: Start difference. First operand 82 states and 171 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:22,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:22,792 INFO L93 Difference]: Finished difference Result 113 states and 221 transitions. [2021-07-13 19:44:22,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:22,793 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:22,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:22,793 INFO L225 Difference]: With dead ends: 113 [2021-07-13 19:44:22,793 INFO L226 Difference]: Without dead ends: 106 [2021-07-13 19:44:22,793 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 452.2ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:44:22,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-07-13 19:44:22,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 83. [2021-07-13 19:44:22,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1341463414634148) internal successors, (175), 82 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:22,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 175 transitions. [2021-07-13 19:44:22,795 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 175 transitions. Word has length 16 [2021-07-13 19:44:22,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:22,795 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 175 transitions. [2021-07-13 19:44:22,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:22,795 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 175 transitions. [2021-07-13 19:44:22,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:22,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:22,796 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:23,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2781,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:23,018 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:23,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:23,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1200523885, now seen corresponding path program 108 times [2021-07-13 19:44:23,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:23,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379561653] [2021-07-13 19:44:23,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:23,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:23,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:23,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:23,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379561653] [2021-07-13 19:44:23,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379561653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:23,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165979738] [2021-07-13 19:44:23,242 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:23,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:44:23,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:23,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:23,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:23,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:23,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165979738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:23,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:23,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-13 19:44:23,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825217022] [2021-07-13 19:44:23,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:44:23,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:23,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:44:23,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:23,381 INFO L87 Difference]: Start difference. First operand 83 states and 175 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:23,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:23,625 INFO L93 Difference]: Finished difference Result 101 states and 203 transitions. [2021-07-13 19:44:23,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:23,625 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:23,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:23,626 INFO L225 Difference]: With dead ends: 101 [2021-07-13 19:44:23,626 INFO L226 Difference]: Without dead ends: 94 [2021-07-13 19:44:23,626 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 398.9ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:23,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-07-13 19:44:23,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 81. [2021-07-13 19:44:23,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.1) internal successors, (168), 80 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:23,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 168 transitions. [2021-07-13 19:44:23,627 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 168 transitions. Word has length 16 [2021-07-13 19:44:23,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:23,627 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 168 transitions. [2021-07-13 19:44:23,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:23,628 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 168 transitions. [2021-07-13 19:44:23,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:23,628 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:23,628 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:23,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2890,112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:23,833 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:23,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:23,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1026290553, now seen corresponding path program 109 times [2021-07-13 19:44:23,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:23,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295097111] [2021-07-13 19:44:23,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:23,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:24,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:24,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:24,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295097111] [2021-07-13 19:44:24,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295097111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:24,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569884286] [2021-07-13 19:44:24,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:24,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:24,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:24,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:24,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:24,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569884286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:24,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:24,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:44:24,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189226933] [2021-07-13 19:44:24,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:44:24,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:24,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:44:24,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:44:24,160 INFO L87 Difference]: Start difference. First operand 81 states and 168 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:24,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:24,392 INFO L93 Difference]: Finished difference Result 109 states and 214 transitions. [2021-07-13 19:44:24,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:24,393 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:24,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:24,393 INFO L225 Difference]: With dead ends: 109 [2021-07-13 19:44:24,393 INFO L226 Difference]: Without dead ends: 102 [2021-07-13 19:44:24,393 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 352.4ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:24,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-07-13 19:44:24,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 83. [2021-07-13 19:44:24,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1341463414634148) internal successors, (175), 82 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:24,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 175 transitions. [2021-07-13 19:44:24,394 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 175 transitions. Word has length 16 [2021-07-13 19:44:24,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:24,394 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 175 transitions. [2021-07-13 19:44:24,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:24,395 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 175 transitions. [2021-07-13 19:44:24,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:24,395 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:24,395 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:24,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2905,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:24,595 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:24,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:24,596 INFO L82 PathProgramCache]: Analyzing trace with hash 665294083, now seen corresponding path program 110 times [2021-07-13 19:44:24,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:24,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429199966] [2021-07-13 19:44:24,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:24,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:24,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:24,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:24,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429199966] [2021-07-13 19:44:24,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429199966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:24,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006582641] [2021-07-13 19:44:24,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:24,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:24,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:24,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:24,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:25,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:25,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006582641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:25,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:25,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 19:44:25,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581844165] [2021-07-13 19:44:25,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:25,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:25,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:25,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:25,133 INFO L87 Difference]: Start difference. First operand 83 states and 175 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:25,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:25,411 INFO L93 Difference]: Finished difference Result 111 states and 216 transitions. [2021-07-13 19:44:25,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:25,412 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:25,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:25,412 INFO L225 Difference]: With dead ends: 111 [2021-07-13 19:44:25,412 INFO L226 Difference]: Without dead ends: 104 [2021-07-13 19:44:25,412 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 518.2ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:44:25,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-07-13 19:44:25,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 82. [2021-07-13 19:44:25,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.111111111111111) internal successors, (171), 81 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:25,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 171 transitions. [2021-07-13 19:44:25,413 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 171 transitions. Word has length 16 [2021-07-13 19:44:25,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:25,413 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 171 transitions. [2021-07-13 19:44:25,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:25,414 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 171 transitions. [2021-07-13 19:44:25,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:25,414 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:25,414 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:25,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2918,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:25,614 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:25,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:25,615 INFO L82 PathProgramCache]: Analyzing trace with hash 838541775, now seen corresponding path program 111 times [2021-07-13 19:44:25,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:25,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022686786] [2021-07-13 19:44:25,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:25,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:25,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:25,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:25,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022686786] [2021-07-13 19:44:25,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022686786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:25,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603954409] [2021-07-13 19:44:25,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:25,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:44:26,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:26,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:26,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:26,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:26,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603954409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:26,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:26,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 19:44:26,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539819154] [2021-07-13 19:44:26,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:26,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:26,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:26,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:26,316 INFO L87 Difference]: Start difference. First operand 82 states and 171 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:26,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:26,561 INFO L93 Difference]: Finished difference Result 96 states and 192 transitions. [2021-07-13 19:44:26,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:26,561 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:26,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:26,561 INFO L225 Difference]: With dead ends: 96 [2021-07-13 19:44:26,561 INFO L226 Difference]: Without dead ends: 89 [2021-07-13 19:44:26,561 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 595.3ms TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:44:26,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-07-13 19:44:26,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2021-07-13 19:44:26,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 79 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:26,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 166 transitions. [2021-07-13 19:44:26,563 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 166 transitions. Word has length 16 [2021-07-13 19:44:26,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:26,563 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 166 transitions. [2021-07-13 19:44:26,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:26,563 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 166 transitions. [2021-07-13 19:44:26,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:26,563 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:26,563 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:26,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2952,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:26,773 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:26,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:26,773 INFO L82 PathProgramCache]: Analyzing trace with hash -438545231, now seen corresponding path program 112 times [2021-07-13 19:44:26,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:26,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511216528] [2021-07-13 19:44:26,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:26,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:26,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:26,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:26,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511216528] [2021-07-13 19:44:26,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511216528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:26,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008778262] [2021-07-13 19:44:26,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:26,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:26,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:26,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:26,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:27,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:27,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008778262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:27,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:27,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:44:27,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897724930] [2021-07-13 19:44:27,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:44:27,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:27,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:44:27,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:44:27,051 INFO L87 Difference]: Start difference. First operand 80 states and 166 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:27,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:27,231 INFO L93 Difference]: Finished difference Result 111 states and 218 transitions. [2021-07-13 19:44:27,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:27,231 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:27,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:27,231 INFO L225 Difference]: With dead ends: 111 [2021-07-13 19:44:27,231 INFO L226 Difference]: Without dead ends: 104 [2021-07-13 19:44:27,231 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 270.4ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:27,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-07-13 19:44:27,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 83. [2021-07-13 19:44:27,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1463414634146343) internal successors, (176), 82 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:27,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 176 transitions. [2021-07-13 19:44:27,233 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 176 transitions. Word has length 16 [2021-07-13 19:44:27,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:27,233 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 176 transitions. [2021-07-13 19:44:27,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:27,233 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 176 transitions. [2021-07-13 19:44:27,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:27,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:27,234 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:27,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2986 [2021-07-13 19:44:27,437 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:27,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:27,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1253039405, now seen corresponding path program 113 times [2021-07-13 19:44:27,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:27,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432236262] [2021-07-13 19:44:27,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:27,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:27,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:27,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432236262] [2021-07-13 19:44:27,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432236262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:27,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471165428] [2021-07-13 19:44:27,620 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:27,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:44:27,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:27,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:27,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:27,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:27,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471165428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:27,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:27,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:44:27,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810124232] [2021-07-13 19:44:27,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:44:27,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:27,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:44:27,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:44:27,759 INFO L87 Difference]: Start difference. First operand 83 states and 176 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:27,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:27,937 INFO L93 Difference]: Finished difference Result 113 states and 220 transitions. [2021-07-13 19:44:27,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:27,937 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:27,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:27,937 INFO L225 Difference]: With dead ends: 113 [2021-07-13 19:44:27,937 INFO L226 Difference]: Without dead ends: 106 [2021-07-13 19:44:27,937 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 285.1ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:27,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-07-13 19:44:27,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 82. [2021-07-13 19:44:27,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.123456790123457) internal successors, (172), 81 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:27,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 172 transitions. [2021-07-13 19:44:27,938 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 172 transitions. Word has length 16 [2021-07-13 19:44:27,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:27,939 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 172 transitions. [2021-07-13 19:44:27,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:27,939 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 172 transitions. [2021-07-13 19:44:27,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:27,939 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:27,939 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:28,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2996,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:28,149 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:28,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:28,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1426287097, now seen corresponding path program 114 times [2021-07-13 19:44:28,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:28,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406355259] [2021-07-13 19:44:28,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:28,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:28,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:28,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:28,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406355259] [2021-07-13 19:44:28,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406355259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:28,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051786922] [2021-07-13 19:44:28,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:28,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:44:28,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:28,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:28,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:28,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051786922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:28,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:28,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:44:28,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154421965] [2021-07-13 19:44:28,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:44:28,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:28,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:44:28,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:44:28,507 INFO L87 Difference]: Start difference. First operand 82 states and 172 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:28,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:28,677 INFO L93 Difference]: Finished difference Result 100 states and 199 transitions. [2021-07-13 19:44:28,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:28,678 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:28,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:28,678 INFO L225 Difference]: With dead ends: 100 [2021-07-13 19:44:28,678 INFO L226 Difference]: Without dead ends: 93 [2021-07-13 19:44:28,678 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 7 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 302.3ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:28,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-07-13 19:44:28,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2021-07-13 19:44:28,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.1125) internal successors, (169), 80 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:28,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 169 transitions. [2021-07-13 19:44:28,679 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 169 transitions. Word has length 16 [2021-07-13 19:44:28,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:28,679 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 169 transitions. [2021-07-13 19:44:28,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:28,679 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 169 transitions. [2021-07-13 19:44:28,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:28,680 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:28,680 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:28,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3011 [2021-07-13 19:44:28,880 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:28,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:28,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1792969043, now seen corresponding path program 115 times [2021-07-13 19:44:28,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:28,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107140153] [2021-07-13 19:44:28,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:28,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:29,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:29,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:29,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107140153] [2021-07-13 19:44:29,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107140153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:29,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616586032] [2021-07-13 19:44:29,148 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:29,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:29,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:29,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:29,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:29,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616586032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:29,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:29,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:44:29,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235101796] [2021-07-13 19:44:29,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:44:29,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:29,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:44:29,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:44:29,291 INFO L87 Difference]: Start difference. First operand 81 states and 169 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:29,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:29,463 INFO L93 Difference]: Finished difference Result 97 states and 193 transitions. [2021-07-13 19:44:29,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:29,464 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:29,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:29,464 INFO L225 Difference]: With dead ends: 97 [2021-07-13 19:44:29,464 INFO L226 Difference]: Without dead ends: 90 [2021-07-13 19:44:29,464 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 379.4ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:29,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-07-13 19:44:29,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2021-07-13 19:44:29,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.103896103896104) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:29,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 162 transitions. [2021-07-13 19:44:29,465 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 162 transitions. Word has length 16 [2021-07-13 19:44:29,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:29,465 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 162 transitions. [2021-07-13 19:44:29,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:29,466 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 162 transitions. [2021-07-13 19:44:29,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:29,466 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:29,466 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:29,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3027 [2021-07-13 19:44:29,666 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:29,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:29,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1124513725, now seen corresponding path program 116 times [2021-07-13 19:44:29,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:29,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964010785] [2021-07-13 19:44:29,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:29,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:29,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:29,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:29,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964010785] [2021-07-13 19:44:29,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964010785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:29,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012623840] [2021-07-13 19:44:29,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:29,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:29,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:29,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:29,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:30,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:30,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012623840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:30,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:30,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:44:30,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942585146] [2021-07-13 19:44:30,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:44:30,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:30,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:44:30,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:44:30,012 INFO L87 Difference]: Start difference. First operand 78 states and 162 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:30,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:30,201 INFO L93 Difference]: Finished difference Result 98 states and 196 transitions. [2021-07-13 19:44:30,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:30,201 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:30,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:30,201 INFO L225 Difference]: With dead ends: 98 [2021-07-13 19:44:30,201 INFO L226 Difference]: Without dead ends: 91 [2021-07-13 19:44:30,201 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 333.1ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:30,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-07-13 19:44:30,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 79. [2021-07-13 19:44:30,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1153846153846154) internal successors, (165), 78 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:30,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 165 transitions. [2021-07-13 19:44:30,202 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 165 transitions. Word has length 16 [2021-07-13 19:44:30,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:30,203 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 165 transitions. [2021-07-13 19:44:30,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:30,203 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 165 transitions. [2021-07-13 19:44:30,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:30,203 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:30,203 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:30,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3039,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:30,409 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:30,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:30,409 INFO L82 PathProgramCache]: Analyzing trace with hash 424020737, now seen corresponding path program 117 times [2021-07-13 19:44:30,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:30,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100138243] [2021-07-13 19:44:30,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:30,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:30,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:30,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:30,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100138243] [2021-07-13 19:44:30,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100138243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:30,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223732948] [2021-07-13 19:44:30,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:30,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:44:30,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:30,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:30,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:30,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:30,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223732948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:30,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:30,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:44:30,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676953887] [2021-07-13 19:44:30,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:44:30,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:30,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:44:30,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:44:30,710 INFO L87 Difference]: Start difference. First operand 79 states and 165 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:30,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:30,886 INFO L93 Difference]: Finished difference Result 113 states and 220 transitions. [2021-07-13 19:44:30,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:30,886 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:30,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:30,887 INFO L225 Difference]: With dead ends: 113 [2021-07-13 19:44:30,887 INFO L226 Difference]: Without dead ends: 106 [2021-07-13 19:44:30,887 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 250.6ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:30,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-07-13 19:44:30,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 80. [2021-07-13 19:44:30,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:30,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-07-13 19:44:30,888 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 16 [2021-07-13 19:44:30,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:30,888 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-07-13 19:44:30,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:30,888 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-07-13 19:44:30,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:30,888 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:30,888 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:31,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3059,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:31,089 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:31,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:31,089 INFO L82 PathProgramCache]: Analyzing trace with hash 2115605373, now seen corresponding path program 118 times [2021-07-13 19:44:31,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:31,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595139634] [2021-07-13 19:44:31,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:31,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:31,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:31,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:31,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595139634] [2021-07-13 19:44:31,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595139634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:31,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582611582] [2021-07-13 19:44:31,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:31,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:31,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:31,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:31,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:31,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:31,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582611582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:31,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:31,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:44:31,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364548627] [2021-07-13 19:44:31,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:44:31,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:31,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:44:31,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:44:31,428 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:31,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:31,609 INFO L93 Difference]: Finished difference Result 101 states and 202 transitions. [2021-07-13 19:44:31,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:31,609 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:31,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:31,609 INFO L225 Difference]: With dead ends: 101 [2021-07-13 19:44:31,610 INFO L226 Difference]: Without dead ends: 94 [2021-07-13 19:44:31,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 287.1ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:31,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-07-13 19:44:31,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 78. [2021-07-13 19:44:31,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.103896103896104) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:31,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 162 transitions. [2021-07-13 19:44:31,611 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 162 transitions. Word has length 16 [2021-07-13 19:44:31,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:31,611 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 162 transitions. [2021-07-13 19:44:31,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:31,611 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 162 transitions. [2021-07-13 19:44:31,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:31,612 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:31,612 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:31,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3080 [2021-07-13 19:44:31,812 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:31,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:31,813 INFO L82 PathProgramCache]: Analyzing trace with hash -111209065, now seen corresponding path program 119 times [2021-07-13 19:44:31,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:31,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993140547] [2021-07-13 19:44:31,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:31,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:32,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:32,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:32,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993140547] [2021-07-13 19:44:32,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993140547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:32,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845760065] [2021-07-13 19:44:32,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:32,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:44:32,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:32,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:32,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:32,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:32,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845760065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:32,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:32,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:44:32,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495105858] [2021-07-13 19:44:32,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:44:32,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:32,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:44:32,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:44:32,164 INFO L87 Difference]: Start difference. First operand 78 states and 162 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:32,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:32,397 INFO L93 Difference]: Finished difference Result 109 states and 213 transitions. [2021-07-13 19:44:32,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:32,397 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:32,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:32,397 INFO L225 Difference]: With dead ends: 109 [2021-07-13 19:44:32,397 INFO L226 Difference]: Without dead ends: 102 [2021-07-13 19:44:32,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 372.5ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:32,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-07-13 19:44:32,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 80. [2021-07-13 19:44:32,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:32,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-07-13 19:44:32,399 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 16 [2021-07-13 19:44:32,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:32,399 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-07-13 19:44:32,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:32,399 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-07-13 19:44:32,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:32,399 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:32,399 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:32,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3101,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:32,600 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:32,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:32,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1580375571, now seen corresponding path program 120 times [2021-07-13 19:44:32,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:32,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243803998] [2021-07-13 19:44:32,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:32,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:32,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:32,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:32,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243803998] [2021-07-13 19:44:32,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243803998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:32,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487524367] [2021-07-13 19:44:32,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:32,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:44:32,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:32,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:32,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:33,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487524367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:33,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:33,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 19:44:33,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549991591] [2021-07-13 19:44:33,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:33,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:33,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:33,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:33,028 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:33,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:33,265 INFO L93 Difference]: Finished difference Result 111 states and 215 transitions. [2021-07-13 19:44:33,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:33,265 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:33,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:33,266 INFO L225 Difference]: With dead ends: 111 [2021-07-13 19:44:33,266 INFO L226 Difference]: Without dead ends: 104 [2021-07-13 19:44:33,266 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 382.3ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:33,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-07-13 19:44:33,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 79. [2021-07-13 19:44:33,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1153846153846154) internal successors, (165), 78 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:33,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 165 transitions. [2021-07-13 19:44:33,267 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 165 transitions. Word has length 16 [2021-07-13 19:44:33,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:33,267 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 165 transitions. [2021-07-13 19:44:33,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:33,267 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 165 transitions. [2021-07-13 19:44:33,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:33,268 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:33,268 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:33,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3117,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:33,481 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:33,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:33,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1753623263, now seen corresponding path program 121 times [2021-07-13 19:44:33,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:33,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188107172] [2021-07-13 19:44:33,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:33,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:33,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:33,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:33,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188107172] [2021-07-13 19:44:33,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188107172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:33,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957964460] [2021-07-13 19:44:33,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:33,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:33,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:33,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:33,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:33,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957964460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:33,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:33,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-13 19:44:33,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736716278] [2021-07-13 19:44:33,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:44:33,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:33,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:44:33,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:33,983 INFO L87 Difference]: Start difference. First operand 79 states and 165 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:34,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:34,170 INFO L93 Difference]: Finished difference Result 96 states and 191 transitions. [2021-07-13 19:44:34,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:34,171 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:34,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:34,171 INFO L225 Difference]: With dead ends: 96 [2021-07-13 19:44:34,171 INFO L226 Difference]: Without dead ends: 89 [2021-07-13 19:44:34,171 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 443.2ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:34,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-07-13 19:44:34,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 77. [2021-07-13 19:44:34,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 76 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:34,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 160 transitions. [2021-07-13 19:44:34,172 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 160 transitions. Word has length 16 [2021-07-13 19:44:34,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:34,172 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 160 transitions. [2021-07-13 19:44:34,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:34,172 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 160 transitions. [2021-07-13 19:44:34,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:34,173 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:34,173 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:34,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3151 [2021-07-13 19:44:34,373 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:34,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:34,373 INFO L82 PathProgramCache]: Analyzing trace with hash 476536257, now seen corresponding path program 122 times [2021-07-13 19:44:34,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:34,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208194200] [2021-07-13 19:44:34,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:34,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:34,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:34,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:34,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208194200] [2021-07-13 19:44:34,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208194200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:34,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931221651] [2021-07-13 19:44:34,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:34,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:34,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:34,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:34,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:34,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:34,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931221651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:34,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:34,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:44:34,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672442372] [2021-07-13 19:44:34,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:44:34,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:34,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:44:34,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:44:34,670 INFO L87 Difference]: Start difference. First operand 77 states and 160 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:34,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:34,876 INFO L93 Difference]: Finished difference Result 111 states and 217 transitions. [2021-07-13 19:44:34,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:34,876 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:34,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:34,876 INFO L225 Difference]: With dead ends: 111 [2021-07-13 19:44:34,877 INFO L226 Difference]: Without dead ends: 104 [2021-07-13 19:44:34,877 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 273.1ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:34,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-07-13 19:44:34,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 80. [2021-07-13 19:44:34,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.151898734177215) internal successors, (170), 79 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:34,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 170 transitions. [2021-07-13 19:44:34,878 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 170 transitions. Word has length 16 [2021-07-13 19:44:34,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:34,878 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 170 transitions. [2021-07-13 19:44:34,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:34,878 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 170 transitions. [2021-07-13 19:44:34,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:34,878 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:34,878 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:35,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3163 [2021-07-13 19:44:35,079 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:35,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:35,079 INFO L82 PathProgramCache]: Analyzing trace with hash -2126846403, now seen corresponding path program 123 times [2021-07-13 19:44:35,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:35,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525284477] [2021-07-13 19:44:35,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:35,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:35,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:35,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:35,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525284477] [2021-07-13 19:44:35,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525284477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:35,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601363005] [2021-07-13 19:44:35,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:35,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:44:35,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:35,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:44:35,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:35,681 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2021-07-13 19:44:36,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:36,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601363005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:36,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:36,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 19:44:36,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558871302] [2021-07-13 19:44:36,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:36,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:36,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:36,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:36,043 INFO L87 Difference]: Start difference. First operand 80 states and 170 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:36,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:36,366 INFO L93 Difference]: Finished difference Result 113 states and 219 transitions. [2021-07-13 19:44:36,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:44:36,366 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:36,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:36,367 INFO L225 Difference]: With dead ends: 113 [2021-07-13 19:44:36,367 INFO L226 Difference]: Without dead ends: 106 [2021-07-13 19:44:36,367 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 786.3ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:44:36,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-07-13 19:44:36,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 79. [2021-07-13 19:44:36,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.128205128205128) internal successors, (166), 78 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:36,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 166 transitions. [2021-07-13 19:44:36,368 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 166 transitions. Word has length 16 [2021-07-13 19:44:36,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:36,368 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 166 transitions. [2021-07-13 19:44:36,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:36,368 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 166 transitions. [2021-07-13 19:44:36,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:36,368 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:36,368 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:36,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3174 [2021-07-13 19:44:36,569 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:36,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:36,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1953598711, now seen corresponding path program 124 times [2021-07-13 19:44:36,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:36,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030291475] [2021-07-13 19:44:36,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:36,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:36,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:36,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030291475] [2021-07-13 19:44:36,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030291475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:36,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570164392] [2021-07-13 19:44:36,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:36,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:36,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:36,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:36,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:36,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:36,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570164392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:36,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:36,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:44:36,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912988767] [2021-07-13 19:44:36,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:44:36,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:36,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:44:36,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:44:36,889 INFO L87 Difference]: Start difference. First operand 79 states and 166 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:37,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:37,062 INFO L93 Difference]: Finished difference Result 100 states and 198 transitions. [2021-07-13 19:44:37,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:37,063 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:37,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:37,063 INFO L225 Difference]: With dead ends: 100 [2021-07-13 19:44:37,063 INFO L226 Difference]: Without dead ends: 93 [2021-07-13 19:44:37,064 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 292.7ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:37,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-07-13 19:44:37,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 78. [2021-07-13 19:44:37,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.116883116883117) internal successors, (163), 77 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:37,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 163 transitions. [2021-07-13 19:44:37,065 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 163 transitions. Word has length 16 [2021-07-13 19:44:37,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:37,065 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 163 transitions. [2021-07-13 19:44:37,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:37,065 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 163 transitions. [2021-07-13 19:44:37,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:37,065 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:37,065 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:37,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3254 [2021-07-13 19:44:37,266 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:37,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:37,266 INFO L82 PathProgramCache]: Analyzing trace with hash -877887555, now seen corresponding path program 125 times [2021-07-13 19:44:37,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:37,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158794476] [2021-07-13 19:44:37,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:37,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:37,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:37,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158794476] [2021-07-13 19:44:37,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158794476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:37,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469088598] [2021-07-13 19:44:37,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:37,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:37,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:37,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:37,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:37,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:37,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469088598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:37,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:37,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:44:37,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506729308] [2021-07-13 19:44:37,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:44:37,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:37,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:44:37,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:44:37,650 INFO L87 Difference]: Start difference. First operand 78 states and 163 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:37,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:37,824 INFO L93 Difference]: Finished difference Result 97 states and 192 transitions. [2021-07-13 19:44:37,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:37,825 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:37,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:37,825 INFO L225 Difference]: With dead ends: 97 [2021-07-13 19:44:37,825 INFO L226 Difference]: Without dead ends: 90 [2021-07-13 19:44:37,825 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 340.5ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:37,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-07-13 19:44:37,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 76. [2021-07-13 19:44:37,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.1066666666666665) internal successors, (158), 75 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:37,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 158 transitions. [2021-07-13 19:44:37,829 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 158 transitions. Word has length 16 [2021-07-13 19:44:37,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:37,829 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 158 transitions. [2021-07-13 19:44:37,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:37,829 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 158 transitions. [2021-07-13 19:44:37,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:37,829 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:37,830 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:38,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3268,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:38,045 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:38,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:38,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1295060303, now seen corresponding path program 126 times [2021-07-13 19:44:38,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:38,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189587925] [2021-07-13 19:44:38,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:38,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:38,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:38,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189587925] [2021-07-13 19:44:38,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189587925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:38,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104521078] [2021-07-13 19:44:38,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:38,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:44:38,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:38,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:38,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:38,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:38,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104521078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:38,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:38,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:44:38,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726264549] [2021-07-13 19:44:38,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:44:38,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:38,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:44:38,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:44:38,351 INFO L87 Difference]: Start difference. First operand 76 states and 158 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:38,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:38,674 INFO L93 Difference]: Finished difference Result 132 states and 254 transitions. [2021-07-13 19:44:38,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:38,674 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:38,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:38,675 INFO L225 Difference]: With dead ends: 132 [2021-07-13 19:44:38,675 INFO L226 Difference]: Without dead ends: 125 [2021-07-13 19:44:38,675 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 389.2ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:38,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-07-13 19:44:38,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 80. [2021-07-13 19:44:38,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1645569620253164) internal successors, (171), 79 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:38,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 171 transitions. [2021-07-13 19:44:38,676 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 171 transitions. Word has length 16 [2021-07-13 19:44:38,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:38,676 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 171 transitions. [2021-07-13 19:44:38,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:38,676 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 171 transitions. [2021-07-13 19:44:38,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:38,677 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:38,677 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:38,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3284 [2021-07-13 19:44:38,893 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:38,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:38,893 INFO L82 PathProgramCache]: Analyzing trace with hash 396524333, now seen corresponding path program 127 times [2021-07-13 19:44:38,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:38,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032005167] [2021-07-13 19:44:38,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:39,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:39,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:39,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032005167] [2021-07-13 19:44:39,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032005167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:39,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449236886] [2021-07-13 19:44:39,073 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:39,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:39,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:39,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:39,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449236886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:39,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:39,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:44:39,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803540463] [2021-07-13 19:44:39,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:44:39,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:39,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:44:39,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:44:39,203 INFO L87 Difference]: Start difference. First operand 80 states and 171 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:39,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:39,489 INFO L93 Difference]: Finished difference Result 134 states and 256 transitions. [2021-07-13 19:44:39,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:39,489 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:39,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:39,490 INFO L225 Difference]: With dead ends: 134 [2021-07-13 19:44:39,490 INFO L226 Difference]: Without dead ends: 127 [2021-07-13 19:44:39,490 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 385.8ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:39,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-07-13 19:44:39,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 79. [2021-07-13 19:44:39,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.141025641025641) internal successors, (167), 78 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:39,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 167 transitions. [2021-07-13 19:44:39,491 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 167 transitions. Word has length 16 [2021-07-13 19:44:39,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:39,491 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 167 transitions. [2021-07-13 19:44:39,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:39,491 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 167 transitions. [2021-07-13 19:44:39,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:39,491 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:39,492 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:39,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3294,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:39,692 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:39,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:39,692 INFO L82 PathProgramCache]: Analyzing trace with hash 569772025, now seen corresponding path program 128 times [2021-07-13 19:44:39,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:39,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386815375] [2021-07-13 19:44:39,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:39,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:39,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:39,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:39,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386815375] [2021-07-13 19:44:39,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386815375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:39,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365410799] [2021-07-13 19:44:39,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:39,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:39,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:39,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:39,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:40,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:40,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365410799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:40,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:40,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:44:40,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140594329] [2021-07-13 19:44:40,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:44:40,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:40,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:44:40,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:44:40,005 INFO L87 Difference]: Start difference. First operand 79 states and 167 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:40,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:40,251 INFO L93 Difference]: Finished difference Result 121 states and 235 transitions. [2021-07-13 19:44:40,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:40,251 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:40,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:40,252 INFO L225 Difference]: With dead ends: 121 [2021-07-13 19:44:40,252 INFO L226 Difference]: Without dead ends: 114 [2021-07-13 19:44:40,252 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 362.6ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:40,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-07-13 19:44:40,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2021-07-13 19:44:40,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.1298701298701297) internal successors, (164), 77 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:40,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 164 transitions. [2021-07-13 19:44:40,253 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 164 transitions. Word has length 16 [2021-07-13 19:44:40,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:40,253 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 164 transitions. [2021-07-13 19:44:40,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:40,253 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 164 transitions. [2021-07-13 19:44:40,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:40,253 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:40,254 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:40,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3308 [2021-07-13 19:44:40,454 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:40,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:40,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1645483181, now seen corresponding path program 129 times [2021-07-13 19:44:40,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:40,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501061199] [2021-07-13 19:44:40,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:40,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:40,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:40,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501061199] [2021-07-13 19:44:40,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501061199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:40,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461469783] [2021-07-13 19:44:40,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:40,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:44:40,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:40,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:40,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:40,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:40,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461469783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:40,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:40,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:44:40,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763459632] [2021-07-13 19:44:40,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:44:40,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:40,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:44:40,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:44:40,774 INFO L87 Difference]: Start difference. First operand 78 states and 164 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:41,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:41,056 INFO L93 Difference]: Finished difference Result 120 states and 232 transitions. [2021-07-13 19:44:41,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:41,057 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:41,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:41,057 INFO L225 Difference]: With dead ends: 120 [2021-07-13 19:44:41,057 INFO L226 Difference]: Without dead ends: 113 [2021-07-13 19:44:41,057 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 383.0ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:41,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-07-13 19:44:41,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 77. [2021-07-13 19:44:41,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.1184210526315788) internal successors, (161), 76 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:41,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 161 transitions. [2021-07-13 19:44:41,059 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 161 transitions. Word has length 16 [2021-07-13 19:44:41,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:41,059 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 161 transitions. [2021-07-13 19:44:41,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:41,059 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 161 transitions. [2021-07-13 19:44:41,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:44:41,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:41,060 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:41,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3322,133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:41,273 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:41,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:41,273 INFO L82 PathProgramCache]: Analyzing trace with hash 126444383, now seen corresponding path program 130 times [2021-07-13 19:44:41,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:41,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561843116] [2021-07-13 19:44:41,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:41,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:41,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:41,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:41,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561843116] [2021-07-13 19:44:41,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561843116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:41,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155435225] [2021-07-13 19:44:41,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:41,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:41,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:41,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:44:41,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:41,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:41,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155435225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:41,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:41,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:44:41,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371281358] [2021-07-13 19:44:41,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:44:41,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:41,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:44:41,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:44:41,603 INFO L87 Difference]: Start difference. First operand 77 states and 161 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:41,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:41,970 INFO L93 Difference]: Finished difference Result 117 states and 226 transitions. [2021-07-13 19:44:41,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:41,971 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:44:41,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:41,971 INFO L225 Difference]: With dead ends: 117 [2021-07-13 19:44:41,971 INFO L226 Difference]: Without dead ends: 110 [2021-07-13 19:44:41,971 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 507.3ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:41,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-07-13 19:44:41,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 79. [2021-07-13 19:44:41,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 78 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:41,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 164 transitions. [2021-07-13 19:44:41,972 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 164 transitions. Word has length 16 [2021-07-13 19:44:41,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:41,972 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 164 transitions. [2021-07-13 19:44:41,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:41,972 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 164 transitions. [2021-07-13 19:44:41,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:44:41,973 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:41,973 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:42,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3336,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:42,173 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:42,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:42,174 INFO L82 PathProgramCache]: Analyzing trace with hash -662723303, now seen corresponding path program 131 times [2021-07-13 19:44:42,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:42,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610323572] [2021-07-13 19:44:42,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:42,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:42,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:42,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:42,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610323572] [2021-07-13 19:44:42,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610323572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:42,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046472835] [2021-07-13 19:44:42,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:42,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:44:42,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:42,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:44:42,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:42,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:42,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046472835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:42,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:42,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:44:42,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987764717] [2021-07-13 19:44:42,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:42,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:42,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:42,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:42,393 INFO L87 Difference]: Start difference. First operand 79 states and 164 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:42,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:42,709 INFO L93 Difference]: Finished difference Result 113 states and 219 transitions. [2021-07-13 19:44:42,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:44:42,710 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:44:42,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:42,710 INFO L225 Difference]: With dead ends: 113 [2021-07-13 19:44:42,710 INFO L226 Difference]: Without dead ends: 99 [2021-07-13 19:44:42,710 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 340.4ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:44:42,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-07-13 19:44:42,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 74. [2021-07-13 19:44:42,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.1095890410958904) internal successors, (154), 73 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:42,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 154 transitions. [2021-07-13 19:44:42,712 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 154 transitions. Word has length 17 [2021-07-13 19:44:42,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:42,712 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 154 transitions. [2021-07-13 19:44:42,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:42,712 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 154 transitions. [2021-07-13 19:44:42,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:44:42,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:42,712 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:42,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3349,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:42,913 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:42,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:42,913 INFO L82 PathProgramCache]: Analyzing trace with hash 17715690, now seen corresponding path program 132 times [2021-07-13 19:44:42,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:42,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582196977] [2021-07-13 19:44:42,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:42,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:42,993 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:42,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:42,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582196977] [2021-07-13 19:44:42,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582196977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:42,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419466863] [2021-07-13 19:44:42,993 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:43,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:44:43,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:43,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:44:43,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:43,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-13 19:44:43,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:43,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-13 19:44:43,114 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:43,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:43,122 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:44:43,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:44:43,124 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-07-13 19:44:43,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:43,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419466863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:43,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:43,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:44:43,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161970283] [2021-07-13 19:44:43,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:44:43,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:43,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:44:43,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:44:43,153 INFO L87 Difference]: Start difference. First operand 74 states and 154 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:43,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:43,312 INFO L93 Difference]: Finished difference Result 111 states and 221 transitions. [2021-07-13 19:44:43,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:43,312 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:44:43,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:43,312 INFO L225 Difference]: With dead ends: 111 [2021-07-13 19:44:43,312 INFO L226 Difference]: Without dead ends: 111 [2021-07-13 19:44:43,313 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 203.9ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:43,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-07-13 19:44:43,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 75. [2021-07-13 19:44:43,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.1216216216216215) internal successors, (157), 74 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:43,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 157 transitions. [2021-07-13 19:44:43,314 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 157 transitions. Word has length 17 [2021-07-13 19:44:43,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:43,314 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 157 transitions. [2021-07-13 19:44:43,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:43,314 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 157 transitions. [2021-07-13 19:44:43,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:44:43,314 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:43,314 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:43,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3354,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:43,515 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:43,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:43,515 INFO L82 PathProgramCache]: Analyzing trace with hash -652368167, now seen corresponding path program 133 times [2021-07-13 19:44:43,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:43,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79456239] [2021-07-13 19:44:43,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:43,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:43,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:43,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:43,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79456239] [2021-07-13 19:44:43,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79456239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:43,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764156287] [2021-07-13 19:44:43,604 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:43,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:43,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:44:43,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:43,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:43,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764156287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:43,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:43,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:44:43,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569217339] [2021-07-13 19:44:43,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:43,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:43,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:43,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:43,736 INFO L87 Difference]: Start difference. First operand 75 states and 157 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:43,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:43,986 INFO L93 Difference]: Finished difference Result 113 states and 219 transitions. [2021-07-13 19:44:43,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:44:43,986 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:44:43,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:43,986 INFO L225 Difference]: With dead ends: 113 [2021-07-13 19:44:43,986 INFO L226 Difference]: Without dead ends: 104 [2021-07-13 19:44:43,986 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 300.6ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:44:43,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-07-13 19:44:43,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 75. [2021-07-13 19:44:43,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.108108108108108) internal successors, (156), 74 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:43,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 156 transitions. [2021-07-13 19:44:43,988 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 156 transitions. Word has length 17 [2021-07-13 19:44:43,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:43,988 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 156 transitions. [2021-07-13 19:44:43,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:43,988 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 156 transitions. [2021-07-13 19:44:43,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:44:43,988 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:43,988 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:44,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3357,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:44,201 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:44,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:44,201 INFO L82 PathProgramCache]: Analyzing trace with hash 878558040, now seen corresponding path program 134 times [2021-07-13 19:44:44,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:44,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480780153] [2021-07-13 19:44:44,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:44,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:44,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:44,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:44,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480780153] [2021-07-13 19:44:44,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480780153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:44,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969927585] [2021-07-13 19:44:44,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:44,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:44,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:44,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:44:44,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:44,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-13 19:44:44,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:44,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-13 19:44:44,382 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:44,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:44,389 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:44:44,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:44:44,389 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-07-13 19:44:44,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:44,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969927585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:44,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:44,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:44:44,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222542059] [2021-07-13 19:44:44,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:44:44,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:44,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:44:44,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:44,414 INFO L87 Difference]: Start difference. First operand 75 states and 156 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:44,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:44,534 INFO L93 Difference]: Finished difference Result 106 states and 215 transitions. [2021-07-13 19:44:44,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:44,534 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:44:44,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:44,534 INFO L225 Difference]: With dead ends: 106 [2021-07-13 19:44:44,534 INFO L226 Difference]: Without dead ends: 106 [2021-07-13 19:44:44,534 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 174.8ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:44,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-07-13 19:44:44,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 75. [2021-07-13 19:44:44,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.108108108108108) internal successors, (156), 74 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:44,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 156 transitions. [2021-07-13 19:44:44,535 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 156 transitions. Word has length 17 [2021-07-13 19:44:44,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:44,535 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 156 transitions. [2021-07-13 19:44:44,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:44,536 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 156 transitions. [2021-07-13 19:44:44,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:44:44,536 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:44,536 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:44,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3362 [2021-07-13 19:44:44,736 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:44,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:44,737 INFO L82 PathProgramCache]: Analyzing trace with hash 483735837, now seen corresponding path program 135 times [2021-07-13 19:44:44,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:44,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92900129] [2021-07-13 19:44:44,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:44,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:44,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:44,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92900129] [2021-07-13 19:44:44,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92900129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:44,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069183922] [2021-07-13 19:44:44,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:44,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:44:44,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:44,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:44:44,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:44,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:44:44,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:44,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:44:44,981 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:44,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-13 19:44:44,985 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:44,988 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:44,988 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:44,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:44:44,991 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:44,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:44:44,994 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:45,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:45,025 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:44:45,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:44:45,027 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-07-13 19:44:45,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:45,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069183922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:45,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:45,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:44:45,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556194933] [2021-07-13 19:44:45,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:45,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:45,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:45,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:45,067 INFO L87 Difference]: Start difference. First operand 75 states and 156 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:45,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:45,335 INFO L93 Difference]: Finished difference Result 111 states and 215 transitions. [2021-07-13 19:44:45,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:44:45,336 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:44:45,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:45,336 INFO L225 Difference]: With dead ends: 111 [2021-07-13 19:44:45,336 INFO L226 Difference]: Without dead ends: 105 [2021-07-13 19:44:45,336 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 344.6ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:44:45,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-07-13 19:44:45,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 75. [2021-07-13 19:44:45,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 74 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:45,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 155 transitions. [2021-07-13 19:44:45,337 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 155 transitions. Word has length 17 [2021-07-13 19:44:45,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:45,337 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 155 transitions. [2021-07-13 19:44:45,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:45,337 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 155 transitions. [2021-07-13 19:44:45,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:44:45,338 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:45,338 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:45,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3365,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:45,538 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:45,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:45,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1225857214, now seen corresponding path program 136 times [2021-07-13 19:44:45,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:45,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395448554] [2021-07-13 19:44:45,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:45,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:45,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:45,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395448554] [2021-07-13 19:44:45,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395448554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:45,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050784120] [2021-07-13 19:44:45,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:45,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:45,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:45,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:44:45,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:45,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-13 19:44:45,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:45,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-13 19:44:45,750 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:45,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:45,756 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:44:45,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:44:45,757 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-07-13 19:44:45,780 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:45,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050784120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:45,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:45,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:44:45,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840312669] [2021-07-13 19:44:45,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:45,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:45,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:45,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:45,781 INFO L87 Difference]: Start difference. First operand 75 states and 155 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:45,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:45,893 INFO L93 Difference]: Finished difference Result 102 states and 206 transitions. [2021-07-13 19:44:45,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:45,894 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:44:45,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:45,894 INFO L225 Difference]: With dead ends: 102 [2021-07-13 19:44:45,894 INFO L226 Difference]: Without dead ends: 102 [2021-07-13 19:44:45,894 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 178.1ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:45,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-07-13 19:44:45,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2021-07-13 19:44:45,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 74 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:45,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 155 transitions. [2021-07-13 19:44:45,895 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 155 transitions. Word has length 17 [2021-07-13 19:44:45,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:45,895 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 155 transitions. [2021-07-13 19:44:45,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:45,895 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 155 transitions. [2021-07-13 19:44:45,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:44:45,895 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:45,896 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:46,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3374 [2021-07-13 19:44:46,096 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:46,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:46,096 INFO L82 PathProgramCache]: Analyzing trace with hash -9865576, now seen corresponding path program 137 times [2021-07-13 19:44:46,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:46,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492015851] [2021-07-13 19:44:46,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:46,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:46,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:46,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:46,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492015851] [2021-07-13 19:44:46,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492015851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:46,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436349919] [2021-07-13 19:44:46,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:46,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:44:46,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:46,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:44:46,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:46,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:46,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436349919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:46,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:46,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:44:46,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719208035] [2021-07-13 19:44:46,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:46,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:46,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:46,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:46,319 INFO L87 Difference]: Start difference. First operand 75 states and 155 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:46,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:46,549 INFO L93 Difference]: Finished difference Result 125 states and 244 transitions. [2021-07-13 19:44:46,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:44:46,549 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:44:46,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:46,549 INFO L225 Difference]: With dead ends: 125 [2021-07-13 19:44:46,549 INFO L226 Difference]: Without dead ends: 125 [2021-07-13 19:44:46,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 271.5ms TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:44:46,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-07-13 19:44:46,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 75. [2021-07-13 19:44:46,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 74 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:46,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 155 transitions. [2021-07-13 19:44:46,551 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 155 transitions. Word has length 17 [2021-07-13 19:44:46,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:46,551 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 155 transitions. [2021-07-13 19:44:46,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:46,551 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 155 transitions. [2021-07-13 19:44:46,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:44:46,551 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:46,551 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:46,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3377,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:46,752 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:46,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:46,752 INFO L82 PathProgramCache]: Analyzing trace with hash -457203299, now seen corresponding path program 138 times [2021-07-13 19:44:46,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:46,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444819321] [2021-07-13 19:44:46,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:46,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:46,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:46,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444819321] [2021-07-13 19:44:46,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444819321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:46,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763824613] [2021-07-13 19:44:46,836 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:46,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:44:46,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:46,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:44:46,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:46,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:46,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763824613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:46,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:46,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:44:46,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030369486] [2021-07-13 19:44:46,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:46,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:46,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:46,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:46,964 INFO L87 Difference]: Start difference. First operand 75 states and 155 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:47,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:47,222 INFO L93 Difference]: Finished difference Result 116 states and 228 transitions. [2021-07-13 19:44:47,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:44:47,223 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:44:47,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:47,223 INFO L225 Difference]: With dead ends: 116 [2021-07-13 19:44:47,223 INFO L226 Difference]: Without dead ends: 116 [2021-07-13 19:44:47,223 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 289.8ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:44:47,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-07-13 19:44:47,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 75. [2021-07-13 19:44:47,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 74 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:47,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 155 transitions. [2021-07-13 19:44:47,224 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 155 transitions. Word has length 17 [2021-07-13 19:44:47,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:47,224 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 155 transitions. [2021-07-13 19:44:47,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:47,224 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 155 transitions. [2021-07-13 19:44:47,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:44:47,225 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:47,225 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:47,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3379,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:47,441 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:47,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:47,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1854966752, now seen corresponding path program 139 times [2021-07-13 19:44:47,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:47,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591738473] [2021-07-13 19:44:47,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:47,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:47,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:47,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:47,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591738473] [2021-07-13 19:44:47,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591738473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:47,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78250743] [2021-07-13 19:44:47,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:47,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:47,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:44:47,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:47,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:47,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78250743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:47,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:47,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:44:47,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094177983] [2021-07-13 19:44:47,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:47,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:47,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:47,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:47,637 INFO L87 Difference]: Start difference. First operand 75 states and 155 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:47,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:47,857 INFO L93 Difference]: Finished difference Result 103 states and 206 transitions. [2021-07-13 19:44:47,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:44:47,857 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:44:47,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:47,858 INFO L225 Difference]: With dead ends: 103 [2021-07-13 19:44:47,858 INFO L226 Difference]: Without dead ends: 101 [2021-07-13 19:44:47,858 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 255.9ms TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:44:47,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-07-13 19:44:47,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 75. [2021-07-13 19:44:47,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.081081081081081) internal successors, (154), 74 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:47,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 154 transitions. [2021-07-13 19:44:47,859 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 154 transitions. Word has length 17 [2021-07-13 19:44:47,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:47,859 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 154 transitions. [2021-07-13 19:44:47,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:47,859 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 154 transitions. [2021-07-13 19:44:47,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:44:47,859 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:47,860 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:48,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3381 [2021-07-13 19:44:48,060 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:48,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:48,060 INFO L82 PathProgramCache]: Analyzing trace with hash 253585771, now seen corresponding path program 140 times [2021-07-13 19:44:48,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:48,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561858807] [2021-07-13 19:44:48,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:48,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:48,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:48,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:48,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561858807] [2021-07-13 19:44:48,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561858807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:48,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514496627] [2021-07-13 19:44:48,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:48,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:48,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:48,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:44:48,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:48,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:44:48,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:48,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:44:48,296 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:48,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:44:48,300 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:48,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:44:48,303 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:48,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-13 19:44:48,306 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:48,308 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:48,308 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:48,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:48,333 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:44:48,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:44:48,334 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-07-13 19:44:48,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:48,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514496627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:48,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:48,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:44:48,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126689921] [2021-07-13 19:44:48,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:44:48,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:48,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:44:48,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:44:48,377 INFO L87 Difference]: Start difference. First operand 75 states and 154 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:48,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:48,494 INFO L93 Difference]: Finished difference Result 89 states and 175 transitions. [2021-07-13 19:44:48,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:44:48,495 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:44:48,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:48,495 INFO L225 Difference]: With dead ends: 89 [2021-07-13 19:44:48,495 INFO L226 Difference]: Without dead ends: 80 [2021-07-13 19:44:48,495 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 202.7ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:48,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-07-13 19:44:48,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2021-07-13 19:44:48,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 74 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:48,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 153 transitions. [2021-07-13 19:44:48,496 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 153 transitions. Word has length 17 [2021-07-13 19:44:48,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:48,496 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 153 transitions. [2021-07-13 19:44:48,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:48,496 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 153 transitions. [2021-07-13 19:44:48,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:44:48,497 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:48,497 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:48,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3385 [2021-07-13 19:44:48,701 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:48,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:48,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1784511978, now seen corresponding path program 141 times [2021-07-13 19:44:48,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:48,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151579369] [2021-07-13 19:44:48,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:48,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:48,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:48,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:48,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151579369] [2021-07-13 19:44:48,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151579369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:48,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875657136] [2021-07-13 19:44:48,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:48,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:44:48,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:48,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:44:48,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:48,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-13 19:44:48,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:48,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-13 19:44:48,878 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:48,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:48,885 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:44:48,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:44:48,888 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-07-13 19:44:48,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:48,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875657136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:48,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:48,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:44:48,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389477626] [2021-07-13 19:44:48,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:44:48,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:48,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:44:48,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:44:48,912 INFO L87 Difference]: Start difference. First operand 75 states and 153 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:49,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:49,002 INFO L93 Difference]: Finished difference Result 92 states and 186 transitions. [2021-07-13 19:44:49,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:49,003 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:44:49,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:49,003 INFO L225 Difference]: With dead ends: 92 [2021-07-13 19:44:49,003 INFO L226 Difference]: Without dead ends: 92 [2021-07-13 19:44:49,003 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 139.5ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:49,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-13 19:44:49,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 75. [2021-07-13 19:44:49,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 74 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:49,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 153 transitions. [2021-07-13 19:44:49,004 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 153 transitions. Word has length 17 [2021-07-13 19:44:49,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:49,004 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 153 transitions. [2021-07-13 19:44:49,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:49,004 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 153 transitions. [2021-07-13 19:44:49,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:44:49,005 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:49,005 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:49,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3394 [2021-07-13 19:44:49,205 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:49,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:49,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1389689775, now seen corresponding path program 142 times [2021-07-13 19:44:49,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:49,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312979453] [2021-07-13 19:44:49,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:49,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:49,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:49,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:49,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312979453] [2021-07-13 19:44:49,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312979453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:49,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27149626] [2021-07-13 19:44:49,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:49,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:49,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:49,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:44:49,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:49,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:44:49,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:49,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:44:49,441 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:49,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-13 19:44:49,445 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:49,447 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:49,448 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:49,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:44:49,451 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:49,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:44:49,456 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:49,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:49,480 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:44:49,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:44:49,483 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-07-13 19:44:49,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:49,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27149626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:49,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:49,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:44:49,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717421807] [2021-07-13 19:44:49,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:44:49,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:49,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:44:49,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:49,523 INFO L87 Difference]: Start difference. First operand 75 states and 153 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:49,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:49,664 INFO L93 Difference]: Finished difference Result 86 states and 169 transitions. [2021-07-13 19:44:49,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:44:49,664 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:44:49,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:49,664 INFO L225 Difference]: With dead ends: 86 [2021-07-13 19:44:49,664 INFO L226 Difference]: Without dead ends: 80 [2021-07-13 19:44:49,664 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 225.4ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:49,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-07-13 19:44:49,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2021-07-13 19:44:49,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.054054054054054) internal successors, (152), 74 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:49,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 152 transitions. [2021-07-13 19:44:49,665 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 152 transitions. Word has length 17 [2021-07-13 19:44:49,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:49,665 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 152 transitions. [2021-07-13 19:44:49,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:49,666 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 152 transitions. [2021-07-13 19:44:49,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:44:49,666 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:49,666 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:49,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3397 [2021-07-13 19:44:49,869 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:49,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:49,870 INFO L82 PathProgramCache]: Analyzing trace with hash 2131811152, now seen corresponding path program 143 times [2021-07-13 19:44:49,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:49,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205330255] [2021-07-13 19:44:49,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:49,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:49,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:49,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205330255] [2021-07-13 19:44:49,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205330255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:49,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655200074] [2021-07-13 19:44:49,980 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:50,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:44:50,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:50,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:44:50,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:50,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-13 19:44:50,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:50,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-13 19:44:50,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:50,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:50,082 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:44:50,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:44:50,083 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-07-13 19:44:50,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:50,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655200074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:50,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:50,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:44:50,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694074316] [2021-07-13 19:44:50,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:44:50,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:50,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:44:50,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:50,108 INFO L87 Difference]: Start difference. First operand 75 states and 152 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:50,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:50,211 INFO L93 Difference]: Finished difference Result 104 states and 209 transitions. [2021-07-13 19:44:50,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:50,211 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:44:50,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:50,212 INFO L225 Difference]: With dead ends: 104 [2021-07-13 19:44:50,212 INFO L226 Difference]: Without dead ends: 104 [2021-07-13 19:44:50,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 168.3ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:50,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-07-13 19:44:50,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 75. [2021-07-13 19:44:50,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.054054054054054) internal successors, (152), 74 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:50,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 152 transitions. [2021-07-13 19:44:50,213 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 152 transitions. Word has length 17 [2021-07-13 19:44:50,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:50,213 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 152 transitions. [2021-07-13 19:44:50,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:50,213 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 152 transitions. [2021-07-13 19:44:50,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:44:50,213 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:50,213 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:50,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3406 [2021-07-13 19:44:50,414 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:50,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:50,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1149243627, now seen corresponding path program 144 times [2021-07-13 19:44:50,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:50,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117486756] [2021-07-13 19:44:50,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:50,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:50,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:50,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117486756] [2021-07-13 19:44:50,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117486756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:50,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109175149] [2021-07-13 19:44:50,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:50,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:44:50,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:50,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:44:50,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:50,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:50,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:50,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:44:50,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:50,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:50,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:44:50,636 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:50,665 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:44:50,665 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:44:50,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:44:50,666 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:44:50,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:50,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109175149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:50,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:50,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:44:50,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514895430] [2021-07-13 19:44:50,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:50,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:50,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:50,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:50,711 INFO L87 Difference]: Start difference. First operand 75 states and 152 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:50,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:50,865 INFO L93 Difference]: Finished difference Result 98 states and 187 transitions. [2021-07-13 19:44:50,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:44:50,866 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:44:50,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:50,866 INFO L225 Difference]: With dead ends: 98 [2021-07-13 19:44:50,866 INFO L226 Difference]: Without dead ends: 95 [2021-07-13 19:44:50,866 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 209.4ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:44:50,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-07-13 19:44:50,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 79. [2021-07-13 19:44:50,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.051282051282051) internal successors, (160), 78 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:50,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 160 transitions. [2021-07-13 19:44:50,867 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 160 transitions. Word has length 17 [2021-07-13 19:44:50,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:50,867 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 160 transitions. [2021-07-13 19:44:50,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:50,868 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 160 transitions. [2021-07-13 19:44:50,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:44:50,868 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:50,868 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:51,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3409,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:51,068 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:51,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:51,069 INFO L82 PathProgramCache]: Analyzing trace with hash 896088362, now seen corresponding path program 145 times [2021-07-13 19:44:51,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:51,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912513439] [2021-07-13 19:44:51,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:51,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:51,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:51,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912513439] [2021-07-13 19:44:51,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912513439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:51,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960832964] [2021-07-13 19:44:51,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:51,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:44:51,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:51,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:44:51,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:51,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:51,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:51,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:44:51,259 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:51,261 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:51,262 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:51,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:51,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:44:51,265 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:51,297 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-07-13 19:44:51,297 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:44:51,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:44:51,298 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:44:51,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:51,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960832964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:51,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:51,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:44:51,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728706611] [2021-07-13 19:44:51,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:51,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:51,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:51,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:51,336 INFO L87 Difference]: Start difference. First operand 79 states and 160 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:51,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:51,577 INFO L93 Difference]: Finished difference Result 114 states and 229 transitions. [2021-07-13 19:44:51,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:44:51,577 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:44:51,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:51,577 INFO L225 Difference]: With dead ends: 114 [2021-07-13 19:44:51,577 INFO L226 Difference]: Without dead ends: 114 [2021-07-13 19:44:51,577 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 263.9ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:44:51,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-07-13 19:44:51,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 79. [2021-07-13 19:44:51,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.051282051282051) internal successors, (160), 78 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:51,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 160 transitions. [2021-07-13 19:44:51,578 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 160 transitions. Word has length 17 [2021-07-13 19:44:51,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:51,579 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 160 transitions. [2021-07-13 19:44:51,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:51,579 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 160 transitions. [2021-07-13 19:44:51,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:44:51,579 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:51,579 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:51,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3427,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:51,781 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:51,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:51,781 INFO L82 PathProgramCache]: Analyzing trace with hash 448750639, now seen corresponding path program 146 times [2021-07-13 19:44:51,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:51,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529887029] [2021-07-13 19:44:51,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:51,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:51,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:51,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:51,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529887029] [2021-07-13 19:44:51,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529887029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:51,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600365256] [2021-07-13 19:44:51,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:51,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:51,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:51,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:44:51,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:51,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:51,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:51,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:44:51,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:51,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:51,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:44:51,996 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:52,024 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:44:52,025 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:44:52,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:44:52,030 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:44:52,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:52,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600365256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:52,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:52,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:44:52,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254996653] [2021-07-13 19:44:52,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:52,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:52,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:52,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:52,068 INFO L87 Difference]: Start difference. First operand 79 states and 160 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:52,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:52,156 INFO L93 Difference]: Finished difference Result 83 states and 166 transitions. [2021-07-13 19:44:52,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:52,156 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:44:52,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:52,157 INFO L225 Difference]: With dead ends: 83 [2021-07-13 19:44:52,157 INFO L226 Difference]: Without dead ends: 83 [2021-07-13 19:44:52,157 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 159.1ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:52,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-07-13 19:44:52,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2021-07-13 19:44:52,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0422535211267605) internal successors, (145), 71 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:52,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 145 transitions. [2021-07-13 19:44:52,158 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 145 transitions. Word has length 17 [2021-07-13 19:44:52,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:52,158 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 145 transitions. [2021-07-13 19:44:52,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:52,158 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 145 transitions. [2021-07-13 19:44:52,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:44:52,158 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:52,158 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:52,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3437 [2021-07-13 19:44:52,359 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:52,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:52,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1865041723, now seen corresponding path program 147 times [2021-07-13 19:44:52,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:52,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102446530] [2021-07-13 19:44:52,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:52,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:52,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:52,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102446530] [2021-07-13 19:44:52,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102446530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:52,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943821898] [2021-07-13 19:44:52,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:52,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:44:52,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:52,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:44:52,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:52,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:44:52,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:52,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:44:52,589 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:52,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-13 19:44:52,592 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:52,594 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:52,595 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:52,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:44:52,598 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:52,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:44:52,601 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:52,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:52,626 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:44:52,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:44:52,627 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-07-13 19:44:52,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:52,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943821898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:52,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:52,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:44:52,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171859952] [2021-07-13 19:44:52,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:44:52,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:52,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:44:52,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:44:52,665 INFO L87 Difference]: Start difference. First operand 72 states and 145 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:52,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:52,777 INFO L93 Difference]: Finished difference Result 85 states and 166 transitions. [2021-07-13 19:44:52,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:44:52,777 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:44:52,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:52,778 INFO L225 Difference]: With dead ends: 85 [2021-07-13 19:44:52,778 INFO L226 Difference]: Without dead ends: 79 [2021-07-13 19:44:52,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 192.3ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:52,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-07-13 19:44:52,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2021-07-13 19:44:52,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:52,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 149 transitions. [2021-07-13 19:44:52,779 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 149 transitions. Word has length 17 [2021-07-13 19:44:52,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:52,779 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 149 transitions. [2021-07-13 19:44:52,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:52,780 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 149 transitions. [2021-07-13 19:44:52,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:44:52,780 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:52,780 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:52,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3453,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:52,998 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:52,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:52,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1122920346, now seen corresponding path program 148 times [2021-07-13 19:44:52,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:52,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161429418] [2021-07-13 19:44:52,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:53,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:53,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:53,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:53,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161429418] [2021-07-13 19:44:53,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161429418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:53,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449970140] [2021-07-13 19:44:53,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:53,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:53,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:53,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:44:53,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:53,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-13 19:44:53,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:53,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-13 19:44:53,228 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:53,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:53,235 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:44:53,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:44:53,236 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-07-13 19:44:53,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:53,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449970140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:53,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:53,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:44:53,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072820865] [2021-07-13 19:44:53,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:44:53,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:53,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:44:53,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:44:53,259 INFO L87 Difference]: Start difference. First operand 74 states and 149 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:53,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:53,339 INFO L93 Difference]: Finished difference Result 87 states and 174 transitions. [2021-07-13 19:44:53,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:53,339 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:44:53,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:53,339 INFO L225 Difference]: With dead ends: 87 [2021-07-13 19:44:53,339 INFO L226 Difference]: Without dead ends: 87 [2021-07-13 19:44:53,339 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 162.8ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:53,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-07-13 19:44:53,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 74. [2021-07-13 19:44:53,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:53,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 149 transitions. [2021-07-13 19:44:53,340 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 149 transitions. Word has length 17 [2021-07-13 19:44:53,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:53,341 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 149 transitions. [2021-07-13 19:44:53,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:53,341 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 149 transitions. [2021-07-13 19:44:53,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:44:53,341 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:53,341 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:53,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3462 [2021-07-13 19:44:53,557 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:53,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:53,557 INFO L82 PathProgramCache]: Analyzing trace with hash -2105487871, now seen corresponding path program 149 times [2021-07-13 19:44:53,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:53,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386172374] [2021-07-13 19:44:53,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:53,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:53,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:53,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:53,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386172374] [2021-07-13 19:44:53,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386172374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:53,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128614784] [2021-07-13 19:44:53,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:53,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:44:53,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:53,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:44:53,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:53,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:53,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:53,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:44:53,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:53,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:53,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:44:53,781 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:53,809 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:44:53,809 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:44:53,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:44:53,810 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:44:53,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:53,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128614784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:53,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:53,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:44:53,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736417500] [2021-07-13 19:44:53,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:44:53,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:53,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:44:53,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:53,852 INFO L87 Difference]: Start difference. First operand 74 states and 149 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:54,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:54,012 INFO L93 Difference]: Finished difference Result 100 states and 191 transitions. [2021-07-13 19:44:54,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:44:54,012 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:44:54,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:54,012 INFO L225 Difference]: With dead ends: 100 [2021-07-13 19:44:54,012 INFO L226 Difference]: Without dead ends: 97 [2021-07-13 19:44:54,013 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 199.7ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:44:54,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-07-13 19:44:54,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 79. [2021-07-13 19:44:54,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 78 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:54,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 161 transitions. [2021-07-13 19:44:54,014 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 161 transitions. Word has length 17 [2021-07-13 19:44:54,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:54,014 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 161 transitions. [2021-07-13 19:44:54,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:54,014 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 161 transitions. [2021-07-13 19:44:54,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:44:54,014 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:54,014 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:54,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3465,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:54,215 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:54,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:54,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1936324160, now seen corresponding path program 150 times [2021-07-13 19:44:54,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:54,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281684585] [2021-07-13 19:44:54,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:54,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:54,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:54,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:54,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281684585] [2021-07-13 19:44:54,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281684585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:54,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911083310] [2021-07-13 19:44:54,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:54,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:44:54,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:54,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:44:54,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:54,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:44:54,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:54,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:44:54,401 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:54,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:54,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:54,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:44:54,404 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:54,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:54,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:44:54,407 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:54,441 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-07-13 19:44:54,441 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:44:54,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:44:54,442 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:44:54,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:54,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911083310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:54,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:54,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:44:54,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18889598] [2021-07-13 19:44:54,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:44:54,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:54,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:44:54,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:54,480 INFO L87 Difference]: Start difference. First operand 79 states and 161 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:54,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:54,648 INFO L93 Difference]: Finished difference Result 128 states and 250 transitions. [2021-07-13 19:44:54,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:44:54,648 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:44:54,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:54,648 INFO L225 Difference]: With dead ends: 128 [2021-07-13 19:44:54,649 INFO L226 Difference]: Without dead ends: 128 [2021-07-13 19:44:54,649 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 209.2ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:44:54,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-07-13 19:44:54,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 79. [2021-07-13 19:44:54,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 78 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:54,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 161 transitions. [2021-07-13 19:44:54,650 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 161 transitions. Word has length 17 [2021-07-13 19:44:54,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:54,650 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 161 transitions. [2021-07-13 19:44:54,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:54,650 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 161 transitions. [2021-07-13 19:44:54,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:44:54,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:54,650 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:54,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3483,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:54,851 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:54,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:54,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1488986437, now seen corresponding path program 151 times [2021-07-13 19:44:54,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:54,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409135953] [2021-07-13 19:44:54,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:54,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:54,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:54,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:54,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409135953] [2021-07-13 19:44:54,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409135953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:54,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539240025] [2021-07-13 19:44:54,949 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:54,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:54,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:44:54,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:55,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:55,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:55,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:44:55,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:55,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:55,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:44:55,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:55,102 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:44:55,102 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:44:55,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:44:55,103 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:44:55,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:55,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539240025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:55,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:55,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:44:55,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523114763] [2021-07-13 19:44:55,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:44:55,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:55,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:44:55,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:55,138 INFO L87 Difference]: Start difference. First operand 79 states and 161 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:55,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:55,237 INFO L93 Difference]: Finished difference Result 85 states and 170 transitions. [2021-07-13 19:44:55,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:55,238 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:44:55,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:55,238 INFO L225 Difference]: With dead ends: 85 [2021-07-13 19:44:55,238 INFO L226 Difference]: Without dead ends: 85 [2021-07-13 19:44:55,238 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 150.0ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:55,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-07-13 19:44:55,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2021-07-13 19:44:55,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.054054054054054) internal successors, (152), 74 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:55,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 152 transitions. [2021-07-13 19:44:55,239 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 152 transitions. Word has length 17 [2021-07-13 19:44:55,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:55,239 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 152 transitions. [2021-07-13 19:44:55,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:55,239 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 152 transitions. [2021-07-13 19:44:55,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:44:55,239 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:55,239 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:55,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3493 [2021-07-13 19:44:55,440 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:55,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:55,440 INFO L82 PathProgramCache]: Analyzing trace with hash -493810808, now seen corresponding path program 152 times [2021-07-13 19:44:55,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:55,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577828297] [2021-07-13 19:44:55,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:55,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:55,532 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:55,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:55,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577828297] [2021-07-13 19:44:55,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577828297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:55,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414946890] [2021-07-13 19:44:55,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:55,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:55,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:55,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:44:55,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:55,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:44:55,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:55,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:55,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:55,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:44:55,620 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:55,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:55,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:55,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:44:55,623 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:55,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:44:55,627 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:55,660 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-07-13 19:44:55,661 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:44:55,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:44:55,664 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:44:55,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:55,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414946890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:55,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:55,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:44:55,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139351205] [2021-07-13 19:44:55,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:44:55,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:55,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:44:55,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:55,722 INFO L87 Difference]: Start difference. First operand 75 states and 152 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:55,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:55,899 INFO L93 Difference]: Finished difference Result 102 states and 203 transitions. [2021-07-13 19:44:55,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:44:55,899 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:44:55,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:55,899 INFO L225 Difference]: With dead ends: 102 [2021-07-13 19:44:55,899 INFO L226 Difference]: Without dead ends: 100 [2021-07-13 19:44:55,899 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 237.5ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:44:55,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-07-13 19:44:55,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 73. [2021-07-13 19:44:55,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0416666666666665) internal successors, (147), 72 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:55,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 147 transitions. [2021-07-13 19:44:55,900 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 147 transitions. Word has length 17 [2021-07-13 19:44:55,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:55,901 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 147 transitions. [2021-07-13 19:44:55,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:55,901 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 147 transitions. [2021-07-13 19:44:55,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:44:55,901 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:55,901 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:56,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3509,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:56,101 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:56,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:56,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1517742549, now seen corresponding path program 153 times [2021-07-13 19:44:56,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:56,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947079479] [2021-07-13 19:44:56,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:56,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:56,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:56,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:56,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947079479] [2021-07-13 19:44:56,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947079479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:56,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427512073] [2021-07-13 19:44:56,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:56,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:44:56,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:56,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:44:56,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:56,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:56,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:56,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:44:56,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:56,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:56,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:44:56,303 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:56,328 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:44:56,328 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:44:56,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:44:56,329 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:44:56,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:56,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427512073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:56,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:56,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:44:56,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020494912] [2021-07-13 19:44:56,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:44:56,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:56,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:44:56,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:56,381 INFO L87 Difference]: Start difference. First operand 73 states and 147 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:56,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:56,552 INFO L93 Difference]: Finished difference Result 105 states and 201 transitions. [2021-07-13 19:44:56,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:44:56,552 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:44:56,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:56,552 INFO L225 Difference]: With dead ends: 105 [2021-07-13 19:44:56,552 INFO L226 Difference]: Without dead ends: 102 [2021-07-13 19:44:56,553 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 223.2ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:44:56,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-07-13 19:44:56,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 80. [2021-07-13 19:44:56,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.088607594936709) internal successors, (165), 79 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:56,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 165 transitions. [2021-07-13 19:44:56,554 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 165 transitions. Word has length 17 [2021-07-13 19:44:56,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:56,554 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 165 transitions. [2021-07-13 19:44:56,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:56,554 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 165 transitions. [2021-07-13 19:44:56,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:44:56,554 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:56,554 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:56,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3522,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:56,755 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:56,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:56,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1770897814, now seen corresponding path program 154 times [2021-07-13 19:44:56,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:56,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732914138] [2021-07-13 19:44:56,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:56,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:56,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:56,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:56,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732914138] [2021-07-13 19:44:56,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732914138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:56,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091955304] [2021-07-13 19:44:56,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:56,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:56,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:56,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:44:56,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:56,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:56,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:56,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:44:56,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:56,984 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:56,985 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:57,020 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-07-13 19:44:57,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:44:57,023 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:57,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:57,037 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:44:57,037 INFO L518 ElimStorePlain]: Eliminatee v_prenex_86 vanished before elimination [2021-07-13 19:44:57,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:44:57,038 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:44:57,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:57,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091955304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:57,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:57,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:44:57,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592536447] [2021-07-13 19:44:57,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:44:57,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:57,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:44:57,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:57,083 INFO L87 Difference]: Start difference. First operand 80 states and 165 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:57,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:57,277 INFO L93 Difference]: Finished difference Result 119 states and 233 transitions. [2021-07-13 19:44:57,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:44:57,278 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:44:57,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:57,278 INFO L225 Difference]: With dead ends: 119 [2021-07-13 19:44:57,278 INFO L226 Difference]: Without dead ends: 119 [2021-07-13 19:44:57,278 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 238.9ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:44:57,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-07-13 19:44:57,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 80. [2021-07-13 19:44:57,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.088607594936709) internal successors, (165), 79 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:57,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 165 transitions. [2021-07-13 19:44:57,279 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 165 transitions. Word has length 17 [2021-07-13 19:44:57,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:57,279 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 165 transitions. [2021-07-13 19:44:57,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:57,280 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 165 transitions. [2021-07-13 19:44:57,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:44:57,280 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:57,280 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:57,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3532,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:57,480 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:57,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:57,481 INFO L82 PathProgramCache]: Analyzing trace with hash 2076731759, now seen corresponding path program 155 times [2021-07-13 19:44:57,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:57,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948025733] [2021-07-13 19:44:57,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:57,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:57,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:57,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:57,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948025733] [2021-07-13 19:44:57,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948025733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:57,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005812164] [2021-07-13 19:44:57,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:57,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:44:57,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:57,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:44:57,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:57,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:57,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:57,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:44:57,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:57,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:57,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:44:57,701 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:57,732 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:44:57,732 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:44:57,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:44:57,733 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:44:57,777 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:57,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005812164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:57,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:57,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:44:57,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181442649] [2021-07-13 19:44:57,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:44:57,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:57,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:44:57,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:57,778 INFO L87 Difference]: Start difference. First operand 80 states and 165 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:57,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:57,880 INFO L93 Difference]: Finished difference Result 105 states and 204 transitions. [2021-07-13 19:44:57,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:57,880 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:44:57,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:57,880 INFO L225 Difference]: With dead ends: 105 [2021-07-13 19:44:57,880 INFO L226 Difference]: Without dead ends: 105 [2021-07-13 19:44:57,881 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 169.1ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:57,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-07-13 19:44:57,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 80. [2021-07-13 19:44:57,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.088607594936709) internal successors, (165), 79 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:57,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 165 transitions. [2021-07-13 19:44:57,882 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 165 transitions. Word has length 17 [2021-07-13 19:44:57,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:57,882 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 165 transitions. [2021-07-13 19:44:57,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:57,882 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 165 transitions. [2021-07-13 19:44:57,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:44:57,883 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:57,883 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:58,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3549 [2021-07-13 19:44:58,095 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:58,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:58,096 INFO L82 PathProgramCache]: Analyzing trace with hash 93934514, now seen corresponding path program 156 times [2021-07-13 19:44:58,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:58,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760431915] [2021-07-13 19:44:58,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:58,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:58,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:58,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:58,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760431915] [2021-07-13 19:44:58,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760431915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:58,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685172458] [2021-07-13 19:44:58,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:58,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:44:58,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:58,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:44:58,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:58,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:58,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:58,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:44:58,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:58,333 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:58,334 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:58,380 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-07-13 19:44:58,380 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:44:58,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:44:58,384 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:58,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:58,401 INFO L518 ElimStorePlain]: Eliminatee v_prenex_90 vanished before elimination [2021-07-13 19:44:58,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:44:58,403 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:44:58,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:58,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685172458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:58,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:58,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:44:58,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956027339] [2021-07-13 19:44:58,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:44:58,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:58,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:44:58,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:58,480 INFO L87 Difference]: Start difference. First operand 80 states and 165 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:58,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:58,665 INFO L93 Difference]: Finished difference Result 118 states and 229 transitions. [2021-07-13 19:44:58,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:44:58,665 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:44:58,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:58,666 INFO L225 Difference]: With dead ends: 118 [2021-07-13 19:44:58,666 INFO L226 Difference]: Without dead ends: 116 [2021-07-13 19:44:58,666 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 271.1ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:44:58,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-07-13 19:44:58,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 79. [2021-07-13 19:44:58,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.076923076923077) internal successors, (162), 78 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:58,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 162 transitions. [2021-07-13 19:44:58,667 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 162 transitions. Word has length 17 [2021-07-13 19:44:58,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:58,667 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 162 transitions. [2021-07-13 19:44:58,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:58,667 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 162 transitions. [2021-07-13 19:44:58,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:44:58,668 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:58,668 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:58,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3557,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:58,881 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:58,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:58,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1541501957, now seen corresponding path program 157 times [2021-07-13 19:44:58,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:58,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577365191] [2021-07-13 19:44:58,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:58,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:58,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:58,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:58,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577365191] [2021-07-13 19:44:58,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577365191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:58,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102450172] [2021-07-13 19:44:58,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:59,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:59,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:44:59,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:59,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:59,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102450172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:59,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:59,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:44:59,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138240596] [2021-07-13 19:44:59,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:44:59,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:59,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:44:59,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:44:59,093 INFO L87 Difference]: Start difference. First operand 79 states and 162 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:59,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:59,182 INFO L93 Difference]: Finished difference Result 90 states and 180 transitions. [2021-07-13 19:44:59,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:59,182 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:44:59,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:59,182 INFO L225 Difference]: With dead ends: 90 [2021-07-13 19:44:59,182 INFO L226 Difference]: Without dead ends: 90 [2021-07-13 19:44:59,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 160.7ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:59,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-07-13 19:44:59,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 74. [2021-07-13 19:44:59,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 73 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:59,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 150 transitions. [2021-07-13 19:44:59,183 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 150 transitions. Word has length 17 [2021-07-13 19:44:59,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:59,184 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 150 transitions. [2021-07-13 19:44:59,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:59,184 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 150 transitions. [2021-07-13 19:44:59,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:44:59,184 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:59,184 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:59,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3577,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:59,384 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:59,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:59,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1169645670, now seen corresponding path program 158 times [2021-07-13 19:44:59,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:59,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389859355] [2021-07-13 19:44:59,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:59,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:59,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:59,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:59,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389859355] [2021-07-13 19:44:59,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389859355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:59,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12549470] [2021-07-13 19:44:59,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:59,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:59,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:59,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:44:59,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:59,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:59,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12549470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:59,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:59,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:44:59,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899686893] [2021-07-13 19:44:59,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:44:59,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:59,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:44:59,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:44:59,625 INFO L87 Difference]: Start difference. First operand 74 states and 150 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:59,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:59,737 INFO L93 Difference]: Finished difference Result 84 states and 166 transitions. [2021-07-13 19:44:59,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:59,737 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:44:59,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:59,738 INFO L225 Difference]: With dead ends: 84 [2021-07-13 19:44:59,738 INFO L226 Difference]: Without dead ends: 80 [2021-07-13 19:44:59,738 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 205.9ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:59,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-07-13 19:44:59,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2021-07-13 19:44:59,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:59,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 149 transitions. [2021-07-13 19:44:59,739 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 149 transitions. Word has length 17 [2021-07-13 19:44:59,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:59,739 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 149 transitions. [2021-07-13 19:44:59,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:59,739 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 149 transitions. [2021-07-13 19:44:59,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:44:59,739 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:59,739 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:59,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3580,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:59,961 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:59,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:59,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1726613223, now seen corresponding path program 159 times [2021-07-13 19:44:59,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:59,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611153174] [2021-07-13 19:44:59,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:59,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:00,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:00,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:00,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611153174] [2021-07-13 19:45:00,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611153174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:00,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057162671] [2021-07-13 19:45:00,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:00,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:45:00,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:00,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:00,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:00,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:45:00,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:00,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:00,181 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:00,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:00,184 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:00,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-13 19:45:00,187 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:00,190 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:45:00,190 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:00,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:45:00,193 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:00,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:00,218 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:00,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:45:00,219 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-07-13 19:45:00,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:00,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057162671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:00,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:00,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:45:00,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124278289] [2021-07-13 19:45:00,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:45:00,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:00,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:45:00,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:45:00,258 INFO L87 Difference]: Start difference. First operand 74 states and 149 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:00,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:00,360 INFO L93 Difference]: Finished difference Result 89 states and 174 transitions. [2021-07-13 19:45:00,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:45:00,360 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:00,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:00,361 INFO L225 Difference]: With dead ends: 89 [2021-07-13 19:45:00,361 INFO L226 Difference]: Without dead ends: 80 [2021-07-13 19:45:00,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 179.1ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:00,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-07-13 19:45:00,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2021-07-13 19:45:00,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.039473684210526) internal successors, (155), 76 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:00,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 155 transitions. [2021-07-13 19:45:00,362 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 155 transitions. Word has length 17 [2021-07-13 19:45:00,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:00,362 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 155 transitions. [2021-07-13 19:45:00,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:00,362 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 155 transitions. [2021-07-13 19:45:00,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:00,363 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:00,363 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:00,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3586,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:00,577 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:00,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:00,577 INFO L82 PathProgramCache]: Analyzing trace with hash -195687016, now seen corresponding path program 160 times [2021-07-13 19:45:00,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:00,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653094454] [2021-07-13 19:45:00,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:00,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:00,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:00,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:00,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653094454] [2021-07-13 19:45:00,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653094454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:00,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501578023] [2021-07-13 19:45:00,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:00,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:00,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:00,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:00,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:00,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-13 19:45:00,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:00,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-13 19:45:00,791 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:00,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:00,798 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:00,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:45:00,799 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-07-13 19:45:00,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:00,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501578023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:00,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:00,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:45:00,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647519824] [2021-07-13 19:45:00,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:45:00,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:00,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:45:00,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:45:00,824 INFO L87 Difference]: Start difference. First operand 77 states and 155 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:00,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:00,943 INFO L93 Difference]: Finished difference Result 92 states and 185 transitions. [2021-07-13 19:45:00,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:00,943 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:00,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:00,944 INFO L225 Difference]: With dead ends: 92 [2021-07-13 19:45:00,944 INFO L226 Difference]: Without dead ends: 92 [2021-07-13 19:45:00,944 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 169.1ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:00,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-13 19:45:00,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 77. [2021-07-13 19:45:00,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.039473684210526) internal successors, (155), 76 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:00,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 155 transitions. [2021-07-13 19:45:00,945 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 155 transitions. Word has length 17 [2021-07-13 19:45:00,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:00,945 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 155 transitions. [2021-07-13 19:45:00,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:00,945 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 155 transitions. [2021-07-13 19:45:00,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:00,946 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:00,946 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:01,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3595 [2021-07-13 19:45:01,166 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:01,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:01,167 INFO L82 PathProgramCache]: Analyzing trace with hash -590509219, now seen corresponding path program 161 times [2021-07-13 19:45:01,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:01,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396676481] [2021-07-13 19:45:01,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:01,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:01,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:01,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:01,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396676481] [2021-07-13 19:45:01,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396676481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:01,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596149392] [2021-07-13 19:45:01,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:01,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:01,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:01,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:01,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:01,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-13 19:45:01,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:01,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:01,446 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:01,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:01,449 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:01,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:45:01,452 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:01,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:45:01,455 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:01,457 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:45:01,457 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:01,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:01,482 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:01,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:45:01,483 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-07-13 19:45:01,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:01,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596149392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:01,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:01,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:01,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395952538] [2021-07-13 19:45:01,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:01,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:01,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:01,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:01,523 INFO L87 Difference]: Start difference. First operand 77 states and 155 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:01,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:01,644 INFO L93 Difference]: Finished difference Result 87 states and 171 transitions. [2021-07-13 19:45:01,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:45:01,644 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:01,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:01,645 INFO L225 Difference]: With dead ends: 87 [2021-07-13 19:45:01,645 INFO L226 Difference]: Without dead ends: 81 [2021-07-13 19:45:01,645 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 246.2ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:45:01,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-07-13 19:45:01,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-07-13 19:45:01,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:01,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-07-13 19:45:01,646 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-07-13 19:45:01,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:01,646 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-07-13 19:45:01,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:01,646 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-07-13 19:45:01,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:01,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:01,646 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:01,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3598,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:01,847 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:01,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:01,847 INFO L82 PathProgramCache]: Analyzing trace with hash 151612158, now seen corresponding path program 162 times [2021-07-13 19:45:01,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:01,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548930592] [2021-07-13 19:45:01,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:01,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:01,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:01,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:01,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548930592] [2021-07-13 19:45:01,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548930592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:01,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450603969] [2021-07-13 19:45:01,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:01,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:45:01,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:01,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:01,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:02,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-13 19:45:02,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:02,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-13 19:45:02,056 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:02,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:02,063 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:02,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:45:02,063 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-07-13 19:45:02,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:02,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450603969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:02,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:02,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:02,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374884621] [2021-07-13 19:45:02,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:02,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:02,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:02,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:02,088 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:02,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:02,198 INFO L93 Difference]: Finished difference Result 105 states and 211 transitions. [2021-07-13 19:45:02,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:02,198 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:02,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:02,198 INFO L225 Difference]: With dead ends: 105 [2021-07-13 19:45:02,198 INFO L226 Difference]: Without dead ends: 105 [2021-07-13 19:45:02,198 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 170.7ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:02,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-07-13 19:45:02,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 78. [2021-07-13 19:45:02,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:02,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-07-13 19:45:02,200 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-07-13 19:45:02,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:02,200 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-07-13 19:45:02,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:02,200 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-07-13 19:45:02,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:02,200 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:02,200 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:02,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3607,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:02,401 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:02,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:02,401 INFO L82 PathProgramCache]: Analyzing trace with hash -830955367, now seen corresponding path program 163 times [2021-07-13 19:45:02,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:02,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364533747] [2021-07-13 19:45:02,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:02,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:02,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:02,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:02,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364533747] [2021-07-13 19:45:02,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364533747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:02,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296490258] [2021-07-13 19:45:02,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:02,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:02,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:02,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:02,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:02,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:02,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:02,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:02,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:02,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:02,622 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:02,650 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:45:02,651 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:02,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:02,651 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:45:02,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:02,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296490258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:02,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:02,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:45:02,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356611932] [2021-07-13 19:45:02,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:45:02,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:02,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:45:02,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:02,697 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:02,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:02,861 INFO L93 Difference]: Finished difference Result 102 states and 196 transitions. [2021-07-13 19:45:02,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:45:02,861 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:02,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:02,861 INFO L225 Difference]: With dead ends: 102 [2021-07-13 19:45:02,862 INFO L226 Difference]: Without dead ends: 99 [2021-07-13 19:45:02,862 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 208.8ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:45:02,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-07-13 19:45:02,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 83. [2021-07-13 19:45:02,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 82 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:02,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 169 transitions. [2021-07-13 19:45:02,863 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 169 transitions. Word has length 17 [2021-07-13 19:45:02,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:02,863 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 169 transitions. [2021-07-13 19:45:02,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:02,863 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 169 transitions. [2021-07-13 19:45:02,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:02,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:02,863 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:03,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3610,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:03,064 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:03,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:03,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1084110632, now seen corresponding path program 164 times [2021-07-13 19:45:03,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:03,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877735719] [2021-07-13 19:45:03,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:03,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:03,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:03,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:03,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877735719] [2021-07-13 19:45:03,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877735719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:03,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585720556] [2021-07-13 19:45:03,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:03,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:03,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:03,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:03,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:03,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:03,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:03,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:03,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:03,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:45:03,254 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:03,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:03,258 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:03,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:03,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:03,261 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:03,302 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-07-13 19:45:03,302 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:03,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:03,303 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:45:03,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:03,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585720556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:03,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:03,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:45:03,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946187586] [2021-07-13 19:45:03,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:45:03,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:03,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:45:03,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:03,342 INFO L87 Difference]: Start difference. First operand 83 states and 169 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:03,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:03,520 INFO L93 Difference]: Finished difference Result 119 states and 233 transitions. [2021-07-13 19:45:03,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:45:03,520 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:03,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:03,521 INFO L225 Difference]: With dead ends: 119 [2021-07-13 19:45:03,521 INFO L226 Difference]: Without dead ends: 119 [2021-07-13 19:45:03,521 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 245.3ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:45:03,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-07-13 19:45:03,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 83. [2021-07-13 19:45:03,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 82 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:03,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 169 transitions. [2021-07-13 19:45:03,522 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 169 transitions. Word has length 17 [2021-07-13 19:45:03,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:03,522 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 169 transitions. [2021-07-13 19:45:03,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:03,522 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 169 transitions. [2021-07-13 19:45:03,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:03,523 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:03,523 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:03,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3628,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:03,723 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:03,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:03,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1531448355, now seen corresponding path program 165 times [2021-07-13 19:45:03,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:03,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366226788] [2021-07-13 19:45:03,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:03,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:03,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:03,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:03,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366226788] [2021-07-13 19:45:03,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366226788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:03,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436461985] [2021-07-13 19:45:03,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:03,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:45:03,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:03,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:03,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:03,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:03,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:03,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:03,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:03,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:03,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:03,950 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:03,979 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:45:03,979 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:03,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:03,980 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:45:04,017 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:04,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436461985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:04,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:04,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:45:04,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066089677] [2021-07-13 19:45:04,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:45:04,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:04,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:45:04,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:04,018 INFO L87 Difference]: Start difference. First operand 83 states and 169 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:04,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:04,117 INFO L93 Difference]: Finished difference Result 87 states and 175 transitions. [2021-07-13 19:45:04,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:04,117 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:04,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:04,117 INFO L225 Difference]: With dead ends: 87 [2021-07-13 19:45:04,117 INFO L226 Difference]: Without dead ends: 87 [2021-07-13 19:45:04,117 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 164.7ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:45:04,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-07-13 19:45:04,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2021-07-13 19:45:04,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.051282051282051) internal successors, (160), 78 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:04,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 160 transitions. [2021-07-13 19:45:04,118 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 160 transitions. Word has length 17 [2021-07-13 19:45:04,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:04,119 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 160 transitions. [2021-07-13 19:45:04,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:04,119 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 160 transitions. [2021-07-13 19:45:04,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:04,119 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:04,119 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:04,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3638 [2021-07-13 19:45:04,319 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:04,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:04,320 INFO L82 PathProgramCache]: Analyzing trace with hash 780721696, now seen corresponding path program 166 times [2021-07-13 19:45:04,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:04,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739968051] [2021-07-13 19:45:04,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:04,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:04,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:04,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739968051] [2021-07-13 19:45:04,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739968051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:04,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145083190] [2021-07-13 19:45:04,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:04,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:04,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:04,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:04,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:04,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:04,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:04,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:04,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:04,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:45:04,506 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:04,508 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:45:04,509 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:04,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:04,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:04,512 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:04,544 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-07-13 19:45:04,545 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:04,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:04,546 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:45:04,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:04,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145083190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:04,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:04,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:45:04,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286431521] [2021-07-13 19:45:04,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:45:04,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:04,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:45:04,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:04,614 INFO L87 Difference]: Start difference. First operand 79 states and 160 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:04,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:04,870 INFO L93 Difference]: Finished difference Result 96 states and 191 transitions. [2021-07-13 19:45:04,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:45:04,870 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:04,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:04,871 INFO L225 Difference]: With dead ends: 96 [2021-07-13 19:45:04,871 INFO L226 Difference]: Without dead ends: 94 [2021-07-13 19:45:04,871 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 313.8ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:45:04,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-07-13 19:45:04,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 76. [2021-07-13 19:45:04,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.04) internal successors, (153), 75 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:04,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 153 transitions. [2021-07-13 19:45:04,872 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 153 transitions. Word has length 17 [2021-07-13 19:45:04,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:04,872 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 153 transitions. [2021-07-13 19:45:04,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:04,873 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 153 transitions. [2021-07-13 19:45:04,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:04,873 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:04,873 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:05,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3654,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:05,077 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:05,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:05,077 INFO L82 PathProgramCache]: Analyzing trace with hash 449726579, now seen corresponding path program 167 times [2021-07-13 19:45:05,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:05,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739007908] [2021-07-13 19:45:05,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:05,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:05,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:05,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:05,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739007908] [2021-07-13 19:45:05,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739007908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:05,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91430865] [2021-07-13 19:45:05,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:05,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:05,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:05,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:05,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:05,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-13 19:45:05,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:05,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:05,328 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:05,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:45:05,331 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:05,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:05,334 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:05,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:45:05,338 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:05,340 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:45:05,341 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:05,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:05,366 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:05,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:45:05,367 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-07-13 19:45:05,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:05,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91430865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:05,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:05,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:45:05,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280325730] [2021-07-13 19:45:05,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:45:05,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:05,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:45:05,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:45:05,406 INFO L87 Difference]: Start difference. First operand 76 states and 153 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:05,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:05,500 INFO L93 Difference]: Finished difference Result 87 states and 171 transitions. [2021-07-13 19:45:05,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:45:05,500 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:05,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:05,501 INFO L225 Difference]: With dead ends: 87 [2021-07-13 19:45:05,501 INFO L226 Difference]: Without dead ends: 81 [2021-07-13 19:45:05,501 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 199.3ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:05,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-07-13 19:45:05,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-07-13 19:45:05,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:05,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-07-13 19:45:05,502 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-07-13 19:45:05,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:05,502 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-07-13 19:45:05,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:05,502 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-07-13 19:45:05,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:05,502 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:05,503 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:05,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3667 [2021-07-13 19:45:05,725 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:05,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:05,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1191847956, now seen corresponding path program 168 times [2021-07-13 19:45:05,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:05,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618984646] [2021-07-13 19:45:05,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:05,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:05,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:05,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618984646] [2021-07-13 19:45:05,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618984646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:05,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529749138] [2021-07-13 19:45:05,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:05,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:45:05,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:05,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:05,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:05,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-13 19:45:05,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:05,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-13 19:45:05,932 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:05,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:05,939 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:05,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:45:05,939 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-07-13 19:45:05,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:05,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529749138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:05,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:05,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:45:05,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107553032] [2021-07-13 19:45:05,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:45:05,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:05,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:45:05,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:45:05,963 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:06,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:06,049 INFO L93 Difference]: Finished difference Result 89 states and 179 transitions. [2021-07-13 19:45:06,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:06,050 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:06,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:06,050 INFO L225 Difference]: With dead ends: 89 [2021-07-13 19:45:06,050 INFO L226 Difference]: Without dead ends: 89 [2021-07-13 19:45:06,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 167.1ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:06,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-07-13 19:45:06,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2021-07-13 19:45:06,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:06,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-07-13 19:45:06,051 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-07-13 19:45:06,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:06,051 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-07-13 19:45:06,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:06,051 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-07-13 19:45:06,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:06,052 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:06,052 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:06,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3676,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:06,252 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:06,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:06,252 INFO L82 PathProgramCache]: Analyzing trace with hash 209280431, now seen corresponding path program 169 times [2021-07-13 19:45:06,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:06,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307189098] [2021-07-13 19:45:06,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:06,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:06,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:06,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:06,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307189098] [2021-07-13 19:45:06,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307189098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:06,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217824472] [2021-07-13 19:45:06,365 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:06,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:06,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:06,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:06,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:06,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:06,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:06,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:06,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:06,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:06,504 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:06,532 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:45:06,532 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:06,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:06,533 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:45:06,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:06,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217824472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:06,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:06,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:06,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040859966] [2021-07-13 19:45:06,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:06,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:06,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:06,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:06,587 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:06,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:06,730 INFO L93 Difference]: Finished difference Result 102 states and 196 transitions. [2021-07-13 19:45:06,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:45:06,730 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:06,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:06,730 INFO L225 Difference]: With dead ends: 102 [2021-07-13 19:45:06,730 INFO L226 Difference]: Without dead ends: 99 [2021-07-13 19:45:06,731 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 219.5ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:06,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-07-13 19:45:06,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 83. [2021-07-13 19:45:06,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 82 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:06,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 169 transitions. [2021-07-13 19:45:06,732 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 169 transitions. Word has length 17 [2021-07-13 19:45:06,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:06,732 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 169 transitions. [2021-07-13 19:45:06,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:06,732 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 169 transitions. [2021-07-13 19:45:06,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:06,732 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:06,732 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:06,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3679,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:06,933 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:06,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:06,933 INFO L82 PathProgramCache]: Analyzing trace with hash -43874834, now seen corresponding path program 170 times [2021-07-13 19:45:06,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:06,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438795997] [2021-07-13 19:45:06,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:06,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:07,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:07,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:07,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438795997] [2021-07-13 19:45:07,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438795997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:07,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378850628] [2021-07-13 19:45:07,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:07,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:07,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:07,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:07,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:07,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:07,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:07,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:07,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:07,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:07,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:07,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:07,140 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:07,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:45:07,143 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:07,145 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:45:07,150 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:07,182 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-07-13 19:45:07,182 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:07,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:07,183 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:45:07,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:07,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378850628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:07,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:07,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:07,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21200557] [2021-07-13 19:45:07,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:07,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:07,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:07,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:07,221 INFO L87 Difference]: Start difference. First operand 83 states and 169 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:07,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:07,371 INFO L93 Difference]: Finished difference Result 120 states and 235 transitions. [2021-07-13 19:45:07,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:45:07,371 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:07,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:07,371 INFO L225 Difference]: With dead ends: 120 [2021-07-13 19:45:07,371 INFO L226 Difference]: Without dead ends: 120 [2021-07-13 19:45:07,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 208.3ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:45:07,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-07-13 19:45:07,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 83. [2021-07-13 19:45:07,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 82 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:07,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 169 transitions. [2021-07-13 19:45:07,373 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 169 transitions. Word has length 17 [2021-07-13 19:45:07,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:07,373 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 169 transitions. [2021-07-13 19:45:07,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:07,373 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 169 transitions. [2021-07-13 19:45:07,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:07,373 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:07,373 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:07,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3697,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:07,577 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:07,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:07,577 INFO L82 PathProgramCache]: Analyzing trace with hash -491212557, now seen corresponding path program 171 times [2021-07-13 19:45:07,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:07,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341531131] [2021-07-13 19:45:07,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:07,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:07,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:07,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:07,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341531131] [2021-07-13 19:45:07,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341531131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:07,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807826261] [2021-07-13 19:45:07,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:07,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:45:07,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:07,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:07,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:07,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:07,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:07,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:07,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:07,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:07,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:07,817 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:07,845 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:45:07,845 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:07,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:07,846 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:45:07,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:07,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807826261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:07,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:07,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:07,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817651766] [2021-07-13 19:45:07,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:07,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:07,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:07,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:07,883 INFO L87 Difference]: Start difference. First operand 83 states and 169 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:07,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:07,967 INFO L93 Difference]: Finished difference Result 87 states and 175 transitions. [2021-07-13 19:45:07,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:07,967 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:07,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:07,968 INFO L225 Difference]: With dead ends: 87 [2021-07-13 19:45:07,968 INFO L226 Difference]: Without dead ends: 87 [2021-07-13 19:45:07,968 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 159.2ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:07,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-07-13 19:45:07,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2021-07-13 19:45:07,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.051282051282051) internal successors, (160), 78 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:07,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 160 transitions. [2021-07-13 19:45:07,969 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 160 transitions. Word has length 17 [2021-07-13 19:45:07,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:07,971 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 160 transitions. [2021-07-13 19:45:07,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:07,971 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 160 transitions. [2021-07-13 19:45:07,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:07,971 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:07,971 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:08,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3706 [2021-07-13 19:45:08,185 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:08,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:08,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1820957494, now seen corresponding path program 172 times [2021-07-13 19:45:08,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:08,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265495782] [2021-07-13 19:45:08,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:08,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:08,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:08,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:08,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265495782] [2021-07-13 19:45:08,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265495782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:08,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333866868] [2021-07-13 19:45:08,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:08,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:08,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:08,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:08,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:08,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:45:08,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:08,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:08,387 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:08,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:08,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:08,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:08,391 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:08,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:08,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:08,394 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:08,427 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-07-13 19:45:08,427 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:08,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:08,428 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:45:08,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:08,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333866868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:08,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:08,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:08,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737311440] [2021-07-13 19:45:08,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:08,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:08,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:08,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:08,486 INFO L87 Difference]: Start difference. First operand 79 states and 160 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:08,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:08,660 INFO L93 Difference]: Finished difference Result 97 states and 193 transitions. [2021-07-13 19:45:08,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:45:08,661 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:08,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:08,661 INFO L225 Difference]: With dead ends: 97 [2021-07-13 19:45:08,661 INFO L226 Difference]: Without dead ends: 95 [2021-07-13 19:45:08,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 245.1ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:45:08,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-07-13 19:45:08,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 77. [2021-07-13 19:45:08,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.039473684210526) internal successors, (155), 76 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:08,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 155 transitions. [2021-07-13 19:45:08,662 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 155 transitions. Word has length 17 [2021-07-13 19:45:08,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:08,662 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 155 transitions. [2021-07-13 19:45:08,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:08,663 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 155 transitions. [2021-07-13 19:45:08,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:08,663 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:08,663 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:08,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3722 [2021-07-13 19:45:08,863 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:08,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:08,864 INFO L82 PathProgramCache]: Analyzing trace with hash 797025753, now seen corresponding path program 173 times [2021-07-13 19:45:08,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:08,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896559395] [2021-07-13 19:45:08,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:08,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:09,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:09,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896559395] [2021-07-13 19:45:09,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896559395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:09,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923924496] [2021-07-13 19:45:09,003 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:09,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:45:09,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:09,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:09,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:09,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:09,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:09,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:09,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:09,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:09,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:09,130 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:09,156 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:45:09,156 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:09,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:09,157 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:45:09,205 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:09,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923924496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:09,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:09,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:09,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18244384] [2021-07-13 19:45:09,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:09,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:09,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:09,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:09,206 INFO L87 Difference]: Start difference. First operand 77 states and 155 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:09,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:09,435 INFO L93 Difference]: Finished difference Result 107 states and 206 transitions. [2021-07-13 19:45:09,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:45:09,436 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:09,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:09,436 INFO L225 Difference]: With dead ends: 107 [2021-07-13 19:45:09,436 INFO L226 Difference]: Without dead ends: 104 [2021-07-13 19:45:09,436 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 264.4ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:45:09,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-07-13 19:45:09,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2021-07-13 19:45:09,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:09,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 173 transitions. [2021-07-13 19:45:09,438 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 173 transitions. Word has length 17 [2021-07-13 19:45:09,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:09,438 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 173 transitions. [2021-07-13 19:45:09,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:09,438 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 173 transitions. [2021-07-13 19:45:09,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:09,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:09,438 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:09,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3735,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:09,639 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:09,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:09,639 INFO L82 PathProgramCache]: Analyzing trace with hash 543870488, now seen corresponding path program 174 times [2021-07-13 19:45:09,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:09,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737536087] [2021-07-13 19:45:09,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:09,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:09,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:09,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:09,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737536087] [2021-07-13 19:45:09,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737536087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:09,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827252028] [2021-07-13 19:45:09,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:09,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:45:09,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:09,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:09,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:09,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:45:09,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:09,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:09,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:09,906 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:09,946 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-07-13 19:45:09,947 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:09,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:09,950 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:09,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:09,964 INFO L518 ElimStorePlain]: Eliminatee v_prenex_96 vanished before elimination [2021-07-13 19:45:09,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:09,965 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:45:10,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:10,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827252028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:10,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:10,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:10,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617020719] [2021-07-13 19:45:10,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:10,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:10,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:10,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:10,013 INFO L87 Difference]: Start difference. First operand 84 states and 173 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:10,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:10,166 INFO L93 Difference]: Finished difference Result 111 states and 218 transitions. [2021-07-13 19:45:10,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:45:10,166 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:10,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:10,167 INFO L225 Difference]: With dead ends: 111 [2021-07-13 19:45:10,167 INFO L226 Difference]: Without dead ends: 111 [2021-07-13 19:45:10,167 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 245.1ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:45:10,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-07-13 19:45:10,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 84. [2021-07-13 19:45:10,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:10,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 173 transitions. [2021-07-13 19:45:10,168 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 173 transitions. Word has length 17 [2021-07-13 19:45:10,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:10,168 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 173 transitions. [2021-07-13 19:45:10,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:10,168 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 173 transitions. [2021-07-13 19:45:10,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:10,168 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:10,169 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:10,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3745 [2021-07-13 19:45:10,369 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:10,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:10,369 INFO L82 PathProgramCache]: Analyzing trace with hash 96532765, now seen corresponding path program 175 times [2021-07-13 19:45:10,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:10,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678962541] [2021-07-13 19:45:10,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:10,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:10,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:10,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:10,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678962541] [2021-07-13 19:45:10,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678962541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:10,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203478070] [2021-07-13 19:45:10,464 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:10,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:10,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:10,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:10,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:10,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:10,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:10,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:10,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:10,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:10,570 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:10,595 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:45:10,595 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:10,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:10,596 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:45:10,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:10,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203478070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:10,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:10,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:10,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30901730] [2021-07-13 19:45:10,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:10,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:10,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:10,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:10,633 INFO L87 Difference]: Start difference. First operand 84 states and 173 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:10,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:10,745 INFO L93 Difference]: Finished difference Result 107 states and 209 transitions. [2021-07-13 19:45:10,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:10,745 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:10,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:10,746 INFO L225 Difference]: With dead ends: 107 [2021-07-13 19:45:10,746 INFO L226 Difference]: Without dead ends: 107 [2021-07-13 19:45:10,746 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 155.1ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:10,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-07-13 19:45:10,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2021-07-13 19:45:10,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:10,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 173 transitions. [2021-07-13 19:45:10,747 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 173 transitions. Word has length 17 [2021-07-13 19:45:10,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:10,747 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 173 transitions. [2021-07-13 19:45:10,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:10,747 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 173 transitions. [2021-07-13 19:45:10,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:10,748 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:10,748 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:10,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3762,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:10,948 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:10,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:10,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1886264480, now seen corresponding path program 176 times [2021-07-13 19:45:10,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:10,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22265594] [2021-07-13 19:45:10,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:10,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:11,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:11,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:11,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22265594] [2021-07-13 19:45:11,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22265594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:11,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569893852] [2021-07-13 19:45:11,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:11,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:11,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:11,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:11,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:11,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:11,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:11,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:11,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:11,204 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:45:11,205 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:11,241 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-07-13 19:45:11,241 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:11,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:45:11,244 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:11,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:11,258 INFO L518 ElimStorePlain]: Eliminatee v_prenex_99 vanished before elimination [2021-07-13 19:45:11,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:11,259 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:45:11,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:11,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569893852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:11,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:11,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:11,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136159079] [2021-07-13 19:45:11,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:11,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:11,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:11,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:11,329 INFO L87 Difference]: Start difference. First operand 84 states and 173 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:11,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:11,503 INFO L93 Difference]: Finished difference Result 113 states and 219 transitions. [2021-07-13 19:45:11,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:45:11,503 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:11,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:11,504 INFO L225 Difference]: With dead ends: 113 [2021-07-13 19:45:11,504 INFO L226 Difference]: Without dead ends: 111 [2021-07-13 19:45:11,504 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 262.6ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:45:11,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-07-13 19:45:11,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 83. [2021-07-13 19:45:11,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.073170731707317) internal successors, (170), 82 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:11,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 170 transitions. [2021-07-13 19:45:11,505 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 170 transitions. Word has length 17 [2021-07-13 19:45:11,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:11,505 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 170 transitions. [2021-07-13 19:45:11,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:11,505 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 170 transitions. [2021-07-13 19:45:11,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:11,505 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:11,506 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:11,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3770 [2021-07-13 19:45:11,706 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:11,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:11,706 INFO L82 PathProgramCache]: Analyzing trace with hash -438697037, now seen corresponding path program 177 times [2021-07-13 19:45:11,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:11,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930744491] [2021-07-13 19:45:11,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:11,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:11,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:11,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:11,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930744491] [2021-07-13 19:45:11,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930744491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:11,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336141565] [2021-07-13 19:45:11,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:11,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:45:11,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:11,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:11,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:11,937 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:11,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336141565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:11,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:11,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:45:11,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371007211] [2021-07-13 19:45:11,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:45:11,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:11,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:45:11,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:45:11,938 INFO L87 Difference]: Start difference. First operand 83 states and 170 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:12,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:12,031 INFO L93 Difference]: Finished difference Result 92 states and 185 transitions. [2021-07-13 19:45:12,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:12,031 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:12,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:12,031 INFO L225 Difference]: With dead ends: 92 [2021-07-13 19:45:12,031 INFO L226 Difference]: Without dead ends: 92 [2021-07-13 19:45:12,032 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 179.1ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:12,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-13 19:45:12,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 78. [2021-07-13 19:45:12,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.051948051948052) internal successors, (158), 77 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:12,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 158 transitions. [2021-07-13 19:45:12,033 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 158 transitions. Word has length 17 [2021-07-13 19:45:12,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:12,033 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 158 transitions. [2021-07-13 19:45:12,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:12,033 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 158 transitions. [2021-07-13 19:45:12,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:12,033 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:12,033 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:12,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3790 [2021-07-13 19:45:12,234 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:12,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:12,234 INFO L82 PathProgramCache]: Analyzing trace with hash -810553324, now seen corresponding path program 178 times [2021-07-13 19:45:12,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:12,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386065760] [2021-07-13 19:45:12,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:12,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:12,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:12,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:12,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386065760] [2021-07-13 19:45:12,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386065760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:12,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310877037] [2021-07-13 19:45:12,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:12,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:12,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:12,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:12,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:12,480 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:12,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310877037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:12,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:12,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:45:12,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034957693] [2021-07-13 19:45:12,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:45:12,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:12,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:45:12,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:45:12,481 INFO L87 Difference]: Start difference. First operand 78 states and 158 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:12,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:12,593 INFO L93 Difference]: Finished difference Result 85 states and 168 transitions. [2021-07-13 19:45:12,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:45:12,593 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:12,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:12,593 INFO L225 Difference]: With dead ends: 85 [2021-07-13 19:45:12,593 INFO L226 Difference]: Without dead ends: 81 [2021-07-13 19:45:12,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 195.8ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:12,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-07-13 19:45:12,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2021-07-13 19:45:12,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 74 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:12,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 151 transitions. [2021-07-13 19:45:12,594 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 151 transitions. Word has length 17 [2021-07-13 19:45:12,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:12,594 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 151 transitions. [2021-07-13 19:45:12,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:12,595 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 151 transitions. [2021-07-13 19:45:12,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:12,595 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:12,595 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:12,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3793 [2021-07-13 19:45:12,797 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:12,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:12,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1662702051, now seen corresponding path program 179 times [2021-07-13 19:45:12,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:12,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826486226] [2021-07-13 19:45:12,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:12,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:12,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:12,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:12,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826486226] [2021-07-13 19:45:12,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826486226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:12,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852526017] [2021-07-13 19:45:12,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:12,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:45:12,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:12,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:12,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:13,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:13,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:13,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:13,032 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:13,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-13 19:45:13,036 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:13,038 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:45:13,038 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:13,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:45:13,041 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:13,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:45:13,044 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:13,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:13,069 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:13,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:45:13,070 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-07-13 19:45:13,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:13,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852526017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:13,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:13,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:45:13,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321220762] [2021-07-13 19:45:13,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:45:13,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:13,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:45:13,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:45:13,109 INFO L87 Difference]: Start difference. First operand 75 states and 151 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:13,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:13,192 INFO L93 Difference]: Finished difference Result 87 states and 171 transitions. [2021-07-13 19:45:13,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:45:13,192 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:13,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:13,193 INFO L225 Difference]: With dead ends: 87 [2021-07-13 19:45:13,193 INFO L226 Difference]: Without dead ends: 81 [2021-07-13 19:45:13,193 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 196.2ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:13,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-07-13 19:45:13,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-07-13 19:45:13,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:13,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-07-13 19:45:13,194 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-07-13 19:45:13,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:13,194 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-07-13 19:45:13,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:13,194 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-07-13 19:45:13,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:13,194 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:13,194 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:13,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3799 [2021-07-13 19:45:13,395 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:13,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:13,395 INFO L82 PathProgramCache]: Analyzing trace with hash -920580674, now seen corresponding path program 180 times [2021-07-13 19:45:13,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:13,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101065670] [2021-07-13 19:45:13,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:13,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:13,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:13,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101065670] [2021-07-13 19:45:13,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101065670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:13,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774357436] [2021-07-13 19:45:13,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:13,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:45:13,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:13,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:13,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:13,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-13 19:45:13,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:13,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-13 19:45:13,603 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:13,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:13,610 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:13,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:45:13,610 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-07-13 19:45:13,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:13,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774357436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:13,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:13,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:45:13,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331817684] [2021-07-13 19:45:13,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:45:13,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:13,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:45:13,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:45:13,637 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:13,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:13,717 INFO L93 Difference]: Finished difference Result 89 states and 179 transitions. [2021-07-13 19:45:13,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:13,717 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:13,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:13,718 INFO L225 Difference]: With dead ends: 89 [2021-07-13 19:45:13,718 INFO L226 Difference]: Without dead ends: 89 [2021-07-13 19:45:13,718 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 164.1ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:13,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-07-13 19:45:13,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2021-07-13 19:45:13,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:13,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-07-13 19:45:13,719 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-07-13 19:45:13,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:13,719 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-07-13 19:45:13,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:13,719 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-07-13 19:45:13,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:13,719 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:13,719 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:13,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3808 [2021-07-13 19:45:13,920 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:13,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:13,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1903148199, now seen corresponding path program 181 times [2021-07-13 19:45:13,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:13,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835381141] [2021-07-13 19:45:13,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:13,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:14,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:14,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:14,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835381141] [2021-07-13 19:45:14,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835381141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:14,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993473464] [2021-07-13 19:45:14,020 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:14,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:14,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:14,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:14,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:14,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:14,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:14,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:14,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:14,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:14,135 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:14,164 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:45:14,164 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:14,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:14,165 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:45:14,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:14,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993473464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:14,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:14,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:14,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113220109] [2021-07-13 19:45:14,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:14,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:14,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:14,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:14,208 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:14,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:14,353 INFO L93 Difference]: Finished difference Result 102 states and 196 transitions. [2021-07-13 19:45:14,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:45:14,354 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:14,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:14,354 INFO L225 Difference]: With dead ends: 102 [2021-07-13 19:45:14,354 INFO L226 Difference]: Without dead ends: 99 [2021-07-13 19:45:14,354 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 198.6ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:14,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-07-13 19:45:14,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 83. [2021-07-13 19:45:14,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 82 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:14,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 169 transitions. [2021-07-13 19:45:14,355 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 169 transitions. Word has length 17 [2021-07-13 19:45:14,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:14,355 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 169 transitions. [2021-07-13 19:45:14,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:14,355 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 169 transitions. [2021-07-13 19:45:14,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:14,356 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:14,356 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:14,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3811 [2021-07-13 19:45:14,571 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:14,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:14,571 INFO L82 PathProgramCache]: Analyzing trace with hash 2138663832, now seen corresponding path program 182 times [2021-07-13 19:45:14,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:14,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104547601] [2021-07-13 19:45:14,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:14,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:14,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:14,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:14,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104547601] [2021-07-13 19:45:14,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104547601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:14,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119722287] [2021-07-13 19:45:14,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:14,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:14,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:14,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:14,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:14,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:14,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:14,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:14,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:14,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:14,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:14,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:14,761 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:14,763 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:45:14,764 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:14,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:45:14,767 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:14,798 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-07-13 19:45:14,798 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:14,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:14,799 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:45:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:14,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119722287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:14,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:14,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:14,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991884847] [2021-07-13 19:45:14,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:14,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:14,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:14,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:14,837 INFO L87 Difference]: Start difference. First operand 83 states and 169 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:14,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:14,995 INFO L93 Difference]: Finished difference Result 121 states and 237 transitions. [2021-07-13 19:45:14,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:45:14,995 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:14,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:14,996 INFO L225 Difference]: With dead ends: 121 [2021-07-13 19:45:14,996 INFO L226 Difference]: Without dead ends: 121 [2021-07-13 19:45:14,996 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 182.4ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:14,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-07-13 19:45:14,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 83. [2021-07-13 19:45:14,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 82 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:14,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 169 transitions. [2021-07-13 19:45:14,997 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 169 transitions. Word has length 17 [2021-07-13 19:45:14,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:14,997 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 169 transitions. [2021-07-13 19:45:14,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:14,997 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 169 transitions. [2021-07-13 19:45:14,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:14,997 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:14,997 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:15,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3829 [2021-07-13 19:45:15,198 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:15,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:15,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1691326109, now seen corresponding path program 183 times [2021-07-13 19:45:15,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:15,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643718587] [2021-07-13 19:45:15,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:15,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:15,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:15,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:15,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643718587] [2021-07-13 19:45:15,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643718587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:15,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525759199] [2021-07-13 19:45:15,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:15,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:45:15,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:15,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:15,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:15,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:15,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:15,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:15,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:15,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:15,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:15,415 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:15,443 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:45:15,444 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:15,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:15,444 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:45:15,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:15,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525759199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:15,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:15,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:15,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586459842] [2021-07-13 19:45:15,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:15,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:15,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:15,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:15,480 INFO L87 Difference]: Start difference. First operand 83 states and 169 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:15,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:15,580 INFO L93 Difference]: Finished difference Result 87 states and 175 transitions. [2021-07-13 19:45:15,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:15,580 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:15,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:15,580 INFO L225 Difference]: With dead ends: 87 [2021-07-13 19:45:15,580 INFO L226 Difference]: Without dead ends: 87 [2021-07-13 19:45:15,580 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 155.4ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:15,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-07-13 19:45:15,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2021-07-13 19:45:15,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.051282051282051) internal successors, (160), 78 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:15,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 160 transitions. [2021-07-13 19:45:15,581 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 160 transitions. Word has length 17 [2021-07-13 19:45:15,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:15,581 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 160 transitions. [2021-07-13 19:45:15,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:15,582 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 160 transitions. [2021-07-13 19:45:15,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:15,582 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:15,582 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:15,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3839,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:15,782 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:15,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:15,783 INFO L82 PathProgramCache]: Analyzing trace with hash -291471136, now seen corresponding path program 184 times [2021-07-13 19:45:15,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:15,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817201416] [2021-07-13 19:45:15,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:15,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:15,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:15,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:15,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817201416] [2021-07-13 19:45:15,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817201416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:15,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085004267] [2021-07-13 19:45:15,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:15,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:15,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:15,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:15,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:15,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:15,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:15,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:15,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:15,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:15,963 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:15,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:45:15,966 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:15,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:15,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:15,969 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:16,003 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-07-13 19:45:16,003 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:16,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:16,004 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:45:16,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:16,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085004267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:16,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:16,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:16,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594816084] [2021-07-13 19:45:16,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:16,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:16,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:16,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:16,062 INFO L87 Difference]: Start difference. First operand 79 states and 160 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:16,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:16,242 INFO L93 Difference]: Finished difference Result 98 states and 195 transitions. [2021-07-13 19:45:16,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:45:16,242 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:16,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:16,243 INFO L225 Difference]: With dead ends: 98 [2021-07-13 19:45:16,243 INFO L226 Difference]: Without dead ends: 96 [2021-07-13 19:45:16,243 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 236.2ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:45:16,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-07-13 19:45:16,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 77. [2021-07-13 19:45:16,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.039473684210526) internal successors, (155), 76 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:16,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 155 transitions. [2021-07-13 19:45:16,244 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 155 transitions. Word has length 17 [2021-07-13 19:45:16,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:16,245 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 155 transitions. [2021-07-13 19:45:16,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:16,245 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 155 transitions. [2021-07-13 19:45:16,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:16,245 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:16,245 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:16,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3855 [2021-07-13 19:45:16,461 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:16,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:16,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1315402877, now seen corresponding path program 185 times [2021-07-13 19:45:16,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:16,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873788973] [2021-07-13 19:45:16,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:16,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:16,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:16,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:16,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873788973] [2021-07-13 19:45:16,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873788973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:16,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938143089] [2021-07-13 19:45:16,560 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:16,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:45:16,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:16,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:16,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:16,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:16,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:16,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:16,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:16,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:16,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:16,669 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:16,694 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:45:16,694 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:16,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:16,695 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:45:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:16,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938143089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:16,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:16,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:16,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28081200] [2021-07-13 19:45:16,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:16,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:16,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:16,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:16,737 INFO L87 Difference]: Start difference. First operand 77 states and 155 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:16,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:16,922 INFO L93 Difference]: Finished difference Result 107 states and 206 transitions. [2021-07-13 19:45:16,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:45:16,923 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:16,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:16,923 INFO L225 Difference]: With dead ends: 107 [2021-07-13 19:45:16,923 INFO L226 Difference]: Without dead ends: 104 [2021-07-13 19:45:16,923 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 219.2ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:45:16,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-07-13 19:45:16,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2021-07-13 19:45:16,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:16,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 173 transitions. [2021-07-13 19:45:16,924 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 173 transitions. Word has length 17 [2021-07-13 19:45:16,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:16,924 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 173 transitions. [2021-07-13 19:45:16,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:16,924 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 173 transitions. [2021-07-13 19:45:16,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:16,925 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:16,925 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:17,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3868,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:17,125 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:17,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:17,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1568558142, now seen corresponding path program 186 times [2021-07-13 19:45:17,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:17,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513834186] [2021-07-13 19:45:17,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:17,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:17,221 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:17,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:17,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513834186] [2021-07-13 19:45:17,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513834186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:17,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307198241] [2021-07-13 19:45:17,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:17,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:45:17,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:17,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:17,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:17,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:17,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:17,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:17,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:17,344 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:17,383 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-07-13 19:45:17,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:45:17,386 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:17,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:17,403 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:17,403 INFO L518 ElimStorePlain]: Eliminatee v_prenex_106 vanished before elimination [2021-07-13 19:45:17,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:17,404 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:45:17,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:17,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307198241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:17,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:17,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:17,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192132703] [2021-07-13 19:45:17,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:17,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:17,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:17,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:17,450 INFO L87 Difference]: Start difference. First operand 84 states and 173 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:17,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:17,621 INFO L93 Difference]: Finished difference Result 112 states and 220 transitions. [2021-07-13 19:45:17,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:45:17,621 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:17,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:17,622 INFO L225 Difference]: With dead ends: 112 [2021-07-13 19:45:17,622 INFO L226 Difference]: Without dead ends: 112 [2021-07-13 19:45:17,622 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 229.0ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:45:17,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-07-13 19:45:17,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 84. [2021-07-13 19:45:17,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:17,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 173 transitions. [2021-07-13 19:45:17,623 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 173 transitions. Word has length 17 [2021-07-13 19:45:17,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:17,623 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 173 transitions. [2021-07-13 19:45:17,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:17,623 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 173 transitions. [2021-07-13 19:45:17,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:17,624 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:17,624 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:17,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3878 [2021-07-13 19:45:17,846 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:17,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:17,847 INFO L82 PathProgramCache]: Analyzing trace with hash -2015895865, now seen corresponding path program 187 times [2021-07-13 19:45:17,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:17,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979778767] [2021-07-13 19:45:17,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:17,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:17,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:17,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:17,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979778767] [2021-07-13 19:45:17,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979778767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:17,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441248889] [2021-07-13 19:45:17,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:17,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:17,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:17,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:18,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:18,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:18,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:18,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:18,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:18,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:18,047 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:18,072 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:45:18,072 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:18,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:18,073 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:45:18,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:18,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441248889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:18,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:18,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:18,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237719178] [2021-07-13 19:45:18,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:18,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:18,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:18,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:18,109 INFO L87 Difference]: Start difference. First operand 84 states and 173 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:18,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:18,204 INFO L93 Difference]: Finished difference Result 107 states and 209 transitions. [2021-07-13 19:45:18,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:18,205 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:18,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:18,205 INFO L225 Difference]: With dead ends: 107 [2021-07-13 19:45:18,205 INFO L226 Difference]: Without dead ends: 107 [2021-07-13 19:45:18,205 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 154.4ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:18,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-07-13 19:45:18,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2021-07-13 19:45:18,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:18,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 173 transitions. [2021-07-13 19:45:18,206 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 173 transitions. Word has length 17 [2021-07-13 19:45:18,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:18,206 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 173 transitions. [2021-07-13 19:45:18,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:18,206 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 173 transitions. [2021-07-13 19:45:18,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:18,207 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:18,207 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:18,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3889,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:18,407 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:18,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:18,407 INFO L82 PathProgramCache]: Analyzing trace with hash 296274186, now seen corresponding path program 188 times [2021-07-13 19:45:18,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:18,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849971425] [2021-07-13 19:45:18,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:18,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:18,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:18,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849971425] [2021-07-13 19:45:18,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849971425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:18,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553007359] [2021-07-13 19:45:18,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:18,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:18,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:18,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:18,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:18,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:18,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:18,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:18,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:18,644 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:18,693 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-07-13 19:45:18,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:45:18,697 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:18,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:18,717 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:18,717 INFO L518 ElimStorePlain]: Eliminatee v_prenex_110 vanished before elimination [2021-07-13 19:45:18,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:18,718 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:45:18,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:18,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553007359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:18,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:18,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:18,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627367792] [2021-07-13 19:45:18,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:18,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:18,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:18,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:18,812 INFO L87 Difference]: Start difference. First operand 84 states and 173 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:19,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:19,052 INFO L93 Difference]: Finished difference Result 114 states and 221 transitions. [2021-07-13 19:45:19,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:45:19,052 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:19,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:19,053 INFO L225 Difference]: With dead ends: 114 [2021-07-13 19:45:19,053 INFO L226 Difference]: Without dead ends: 112 [2021-07-13 19:45:19,053 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 295.5ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:45:19,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-07-13 19:45:19,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 83. [2021-07-13 19:45:19,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.073170731707317) internal successors, (170), 82 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:19,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 170 transitions. [2021-07-13 19:45:19,054 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 170 transitions. Word has length 17 [2021-07-13 19:45:19,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:19,054 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 170 transitions. [2021-07-13 19:45:19,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:19,055 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 170 transitions. [2021-07-13 19:45:19,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:19,055 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:19,055 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:19,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3897,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:19,255 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:19,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:19,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1743841629, now seen corresponding path program 189 times [2021-07-13 19:45:19,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:19,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552104465] [2021-07-13 19:45:19,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:19,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:19,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:19,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552104465] [2021-07-13 19:45:19,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552104465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:19,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3909189] [2021-07-13 19:45:19,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:19,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:45:19,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:19,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:19,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:19,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:19,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3909189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:19,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:19,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:45:19,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765718509] [2021-07-13 19:45:19,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:45:19,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:19,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:45:19,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:45:19,488 INFO L87 Difference]: Start difference. First operand 83 states and 170 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:19,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:19,592 INFO L93 Difference]: Finished difference Result 92 states and 185 transitions. [2021-07-13 19:45:19,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:19,593 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:19,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:19,593 INFO L225 Difference]: With dead ends: 92 [2021-07-13 19:45:19,593 INFO L226 Difference]: Without dead ends: 92 [2021-07-13 19:45:19,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 179.4ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:19,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-13 19:45:19,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 78. [2021-07-13 19:45:19,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.051948051948052) internal successors, (158), 77 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:19,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 158 transitions. [2021-07-13 19:45:19,594 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 158 transitions. Word has length 17 [2021-07-13 19:45:19,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:19,594 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 158 transitions. [2021-07-13 19:45:19,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:19,594 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 158 transitions. [2021-07-13 19:45:19,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:19,595 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:19,595 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:19,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3911 [2021-07-13 19:45:19,795 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:19,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:19,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1371985342, now seen corresponding path program 190 times [2021-07-13 19:45:19,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:19,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577950117] [2021-07-13 19:45:19,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:19,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:19,922 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:19,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:19,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577950117] [2021-07-13 19:45:19,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577950117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:19,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396643885] [2021-07-13 19:45:19,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:19,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:19,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:19,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:19,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:20,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:20,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396643885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:20,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:20,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:45:20,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267041058] [2021-07-13 19:45:20,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:45:20,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:20,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:45:20,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:45:20,066 INFO L87 Difference]: Start difference. First operand 78 states and 158 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:20,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:20,211 INFO L93 Difference]: Finished difference Result 85 states and 168 transitions. [2021-07-13 19:45:20,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:45:20,211 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:20,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:20,212 INFO L225 Difference]: With dead ends: 85 [2021-07-13 19:45:20,212 INFO L226 Difference]: Without dead ends: 81 [2021-07-13 19:45:20,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 222.6ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:20,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-07-13 19:45:20,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2021-07-13 19:45:20,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.04) internal successors, (153), 75 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:20,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 153 transitions. [2021-07-13 19:45:20,213 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 153 transitions. Word has length 17 [2021-07-13 19:45:20,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:20,213 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 153 transitions. [2021-07-13 19:45:20,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:20,213 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 153 transitions. [2021-07-13 19:45:20,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:20,214 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:20,214 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:20,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3914,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:20,414 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:20,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:20,415 INFO L82 PathProgramCache]: Analyzing trace with hash -275167079, now seen corresponding path program 191 times [2021-07-13 19:45:20,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:20,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949443280] [2021-07-13 19:45:20,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:20,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:20,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:20,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:20,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949443280] [2021-07-13 19:45:20,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949443280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:20,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82436500] [2021-07-13 19:45:20,502 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:20,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:45:20,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:20,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:20,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:20,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:20,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:20,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:20,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:20,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:20,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:20,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:20,658 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:20,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:45:20,661 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:20,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:20,664 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:20,705 INFO L628 ElimStorePlain]: treesize reduction 58, result has 42.0 percent of original size [2021-07-13 19:45:20,706 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:20,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:20,707 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:129, output treesize:18 [2021-07-13 19:45:20,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:20,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82436500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:20,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:20,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:45:20,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882611255] [2021-07-13 19:45:20,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:45:20,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:20,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:45:20,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:20,757 INFO L87 Difference]: Start difference. First operand 76 states and 153 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:20,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:20,968 INFO L93 Difference]: Finished difference Result 112 states and 216 transitions. [2021-07-13 19:45:20,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:45:20,968 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:20,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:20,969 INFO L225 Difference]: With dead ends: 112 [2021-07-13 19:45:20,969 INFO L226 Difference]: Without dead ends: 109 [2021-07-13 19:45:20,969 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 270.0ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:45:20,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-07-13 19:45:20,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2021-07-13 19:45:20,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.107142857142857) internal successors, (177), 84 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:20,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 177 transitions. [2021-07-13 19:45:20,970 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 177 transitions. Word has length 17 [2021-07-13 19:45:20,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:20,970 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 177 transitions. [2021-07-13 19:45:20,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:20,970 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 177 transitions. [2021-07-13 19:45:20,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:20,971 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:20,971 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:21,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3920 [2021-07-13 19:45:21,177 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:21,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:21,177 INFO L82 PathProgramCache]: Analyzing trace with hash -528322344, now seen corresponding path program 192 times [2021-07-13 19:45:21,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:21,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334030713] [2021-07-13 19:45:21,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:21,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:21,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:21,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:21,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334030713] [2021-07-13 19:45:21,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334030713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:21,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584501024] [2021-07-13 19:45:21,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:21,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:45:21,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:21,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:21,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:21,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:21,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:21,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:45:21,462 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:21,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:21,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:21,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:21,466 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:21,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:21,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:21,479 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:21,541 INFO L628 ElimStorePlain]: treesize reduction 39, result has 61.0 percent of original size [2021-07-13 19:45:21,541 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:21,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:45:21,542 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:129, output treesize:29 [2021-07-13 19:45:21,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:21,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584501024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:21,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:21,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:45:21,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896878892] [2021-07-13 19:45:21,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:45:21,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:21,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:45:21,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:21,592 INFO L87 Difference]: Start difference. First operand 85 states and 177 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:21,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:21,784 INFO L93 Difference]: Finished difference Result 115 states and 227 transitions. [2021-07-13 19:45:21,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:45:21,784 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:21,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:21,785 INFO L225 Difference]: With dead ends: 115 [2021-07-13 19:45:21,785 INFO L226 Difference]: Without dead ends: 115 [2021-07-13 19:45:21,785 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 263.7ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:45:21,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-07-13 19:45:21,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 85. [2021-07-13 19:45:21,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.107142857142857) internal successors, (177), 84 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:21,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 177 transitions. [2021-07-13 19:45:21,786 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 177 transitions. Word has length 17 [2021-07-13 19:45:21,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:21,786 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 177 transitions. [2021-07-13 19:45:21,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:21,786 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 177 transitions. [2021-07-13 19:45:21,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:21,786 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:21,787 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:21,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3932,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:21,987 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:21,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:21,987 INFO L82 PathProgramCache]: Analyzing trace with hash -975660067, now seen corresponding path program 193 times [2021-07-13 19:45:21,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:21,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294669379] [2021-07-13 19:45:21,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:21,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:22,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:22,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:22,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294669379] [2021-07-13 19:45:22,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294669379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:22,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290885020] [2021-07-13 19:45:22,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:22,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:22,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:22,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:22,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:22,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:22,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:22,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:22,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:22,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:22,231 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:22,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:22,235 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:22,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:45:22,238 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:22,279 INFO L628 ElimStorePlain]: treesize reduction 58, result has 42.0 percent of original size [2021-07-13 19:45:22,279 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:22,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:22,280 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:129, output treesize:18 [2021-07-13 19:45:22,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:22,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290885020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:22,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:22,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:45:22,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746174774] [2021-07-13 19:45:22,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:45:22,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:22,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:45:22,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:22,318 INFO L87 Difference]: Start difference. First operand 85 states and 177 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:22,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:22,432 INFO L93 Difference]: Finished difference Result 112 states and 219 transitions. [2021-07-13 19:45:22,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:22,432 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:22,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:22,432 INFO L225 Difference]: With dead ends: 112 [2021-07-13 19:45:22,432 INFO L226 Difference]: Without dead ends: 112 [2021-07-13 19:45:22,432 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 176.4ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:45:22,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-07-13 19:45:22,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 85. [2021-07-13 19:45:22,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.107142857142857) internal successors, (177), 84 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:22,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 177 transitions. [2021-07-13 19:45:22,433 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 177 transitions. Word has length 17 [2021-07-13 19:45:22,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:22,434 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 177 transitions. [2021-07-13 19:45:22,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:22,434 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 177 transitions. [2021-07-13 19:45:22,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:22,434 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:22,434 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:22,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3951 [2021-07-13 19:45:22,634 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:22,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:22,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1336509984, now seen corresponding path program 194 times [2021-07-13 19:45:22,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:22,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039516476] [2021-07-13 19:45:22,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:22,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:22,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:22,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:22,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039516476] [2021-07-13 19:45:22,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039516476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:22,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989183285] [2021-07-13 19:45:22,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:22,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:22,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:22,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:22,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:22,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:22,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:22,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:22,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:22,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:22,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:22,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:22,940 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:22,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:45:22,943 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:22,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:22,947 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:22,999 INFO L628 ElimStorePlain]: treesize reduction 36, result has 63.3 percent of original size [2021-07-13 19:45:22,999 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:23,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:45:23,001 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:127, output treesize:38 [2021-07-13 19:45:23,079 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:23,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989183285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:23,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:23,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:45:23,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785271300] [2021-07-13 19:45:23,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:45:23,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:23,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:45:23,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:23,080 INFO L87 Difference]: Start difference. First operand 85 states and 177 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:23,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:23,376 INFO L93 Difference]: Finished difference Result 117 states and 228 transitions. [2021-07-13 19:45:23,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:45:23,376 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:23,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:23,377 INFO L225 Difference]: With dead ends: 117 [2021-07-13 19:45:23,377 INFO L226 Difference]: Without dead ends: 115 [2021-07-13 19:45:23,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 386.5ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:45:23,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-07-13 19:45:23,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 84. [2021-07-13 19:45:23,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0963855421686746) internal successors, (174), 83 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:23,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 174 transitions. [2021-07-13 19:45:23,378 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 174 transitions. Word has length 17 [2021-07-13 19:45:23,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:23,378 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 174 transitions. [2021-07-13 19:45:23,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:23,378 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 174 transitions. [2021-07-13 19:45:23,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:23,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:23,378 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:23,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3961,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:23,579 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:23,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:23,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1510889869, now seen corresponding path program 195 times [2021-07-13 19:45:23,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:23,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696814667] [2021-07-13 19:45:23,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:23,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:23,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:23,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:23,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696814667] [2021-07-13 19:45:23,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696814667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:23,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861278517] [2021-07-13 19:45:23,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:23,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:45:23,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:23,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:23,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:23,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:23,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861278517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:23,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:23,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:23,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904133990] [2021-07-13 19:45:23,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:23,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:23,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:23,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:23,825 INFO L87 Difference]: Start difference. First operand 84 states and 174 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:23,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:23,949 INFO L93 Difference]: Finished difference Result 104 states and 210 transitions. [2021-07-13 19:45:23,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:23,950 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:23,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:23,950 INFO L225 Difference]: With dead ends: 104 [2021-07-13 19:45:23,950 INFO L226 Difference]: Without dead ends: 104 [2021-07-13 19:45:23,950 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 198.5ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:23,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-07-13 19:45:23,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2021-07-13 19:45:23,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0963855421686746) internal successors, (174), 83 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:23,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 174 transitions. [2021-07-13 19:45:23,951 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 174 transitions. Word has length 17 [2021-07-13 19:45:23,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:23,951 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 174 transitions. [2021-07-13 19:45:23,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:23,951 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 174 transitions. [2021-07-13 19:45:23,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:23,952 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:23,952 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:24,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3983,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:24,152 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:24,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:24,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1882746156, now seen corresponding path program 196 times [2021-07-13 19:45:24,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:24,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399281531] [2021-07-13 19:45:24,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:24,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:24,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:24,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399281531] [2021-07-13 19:45:24,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399281531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:24,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838491449] [2021-07-13 19:45:24,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:24,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:24,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:24,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:24,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:24,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:24,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838491449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:24,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:24,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:24,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499249236] [2021-07-13 19:45:24,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:24,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:24,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:24,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:24,420 INFO L87 Difference]: Start difference. First operand 84 states and 174 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:24,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:24,568 INFO L93 Difference]: Finished difference Result 96 states and 192 transitions. [2021-07-13 19:45:24,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:45:24,569 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:24,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:24,569 INFO L225 Difference]: With dead ends: 96 [2021-07-13 19:45:24,569 INFO L226 Difference]: Without dead ends: 92 [2021-07-13 19:45:24,569 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 234.6ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:45:24,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-13 19:45:24,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2021-07-13 19:45:24,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 82 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:24,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 171 transitions. [2021-07-13 19:45:24,570 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 171 transitions. Word has length 17 [2021-07-13 19:45:24,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:24,570 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 171 transitions. [2021-07-13 19:45:24,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:24,570 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 171 transitions. [2021-07-13 19:45:24,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:24,571 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:24,571 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:24,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3986 [2021-07-13 19:45:24,771 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:24,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:24,771 INFO L82 PathProgramCache]: Analyzing trace with hash -923144547, now seen corresponding path program 197 times [2021-07-13 19:45:24,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:24,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279494522] [2021-07-13 19:45:24,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:24,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:24,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:24,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:24,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279494522] [2021-07-13 19:45:24,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279494522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:24,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904050766] [2021-07-13 19:45:24,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:24,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:45:24,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:24,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:24,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:24,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:24,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904050766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:24,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:24,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:45:24,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492149278] [2021-07-13 19:45:24,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:45:24,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:24,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:45:24,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:45:24,980 INFO L87 Difference]: Start difference. First operand 83 states and 171 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:25,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:25,066 INFO L93 Difference]: Finished difference Result 97 states and 195 transitions. [2021-07-13 19:45:25,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:25,067 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:25,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:25,067 INFO L225 Difference]: With dead ends: 97 [2021-07-13 19:45:25,067 INFO L226 Difference]: Without dead ends: 97 [2021-07-13 19:45:25,067 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 166.7ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:25,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-07-13 19:45:25,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 78. [2021-07-13 19:45:25,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.064935064935065) internal successors, (159), 77 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:25,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 159 transitions. [2021-07-13 19:45:25,068 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 159 transitions. Word has length 17 [2021-07-13 19:45:25,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:25,068 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 159 transitions. [2021-07-13 19:45:25,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:25,068 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 159 transitions. [2021-07-13 19:45:25,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:25,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:25,069 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:25,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3992,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:25,269 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:25,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:25,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1399528608, now seen corresponding path program 198 times [2021-07-13 19:45:25,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:25,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302186340] [2021-07-13 19:45:25,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:25,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:25,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:25,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302186340] [2021-07-13 19:45:25,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302186340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:25,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513534663] [2021-07-13 19:45:25,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:25,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:45:25,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:25,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:25,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:25,503 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:25,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513534663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:25,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:25,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:45:25,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587979636] [2021-07-13 19:45:25,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:45:25,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:25,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:45:25,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:45:25,504 INFO L87 Difference]: Start difference. First operand 78 states and 159 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:25,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:25,618 INFO L93 Difference]: Finished difference Result 87 states and 172 transitions. [2021-07-13 19:45:25,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:45:25,618 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:25,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:25,618 INFO L225 Difference]: With dead ends: 87 [2021-07-13 19:45:25,618 INFO L226 Difference]: Without dead ends: 81 [2021-07-13 19:45:25,618 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 211.0ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:25,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-07-13 19:45:25,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-07-13 19:45:25,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.051948051948052) internal successors, (158), 77 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:25,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 158 transitions. [2021-07-13 19:45:25,619 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 158 transitions. Word has length 17 [2021-07-13 19:45:25,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:25,620 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 158 transitions. [2021-07-13 19:45:25,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:25,620 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 158 transitions. [2021-07-13 19:45:25,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:25,620 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:25,620 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:25,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3995,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:25,820 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:25,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:25,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1296800747, now seen corresponding path program 199 times [2021-07-13 19:45:25,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:25,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525318958] [2021-07-13 19:45:25,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:25,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:25,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:25,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:25,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525318958] [2021-07-13 19:45:25,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525318958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:25,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258389727] [2021-07-13 19:45:25,932 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:25,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:25,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:25,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:26,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-13 19:45:26,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:26,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:26,076 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:26,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:26,080 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:26,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:45:26,088 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:26,090 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:45:26,091 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:26,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:45:26,094 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:26,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:26,124 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:26,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:45:26,125 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-07-13 19:45:26,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:26,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258389727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:26,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:26,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:45:26,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446026930] [2021-07-13 19:45:26,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:45:26,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:26,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:45:26,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:45:26,181 INFO L87 Difference]: Start difference. First operand 78 states and 158 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:26,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:26,295 INFO L93 Difference]: Finished difference Result 91 states and 178 transitions. [2021-07-13 19:45:26,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:45:26,295 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:26,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:26,295 INFO L225 Difference]: With dead ends: 91 [2021-07-13 19:45:26,295 INFO L226 Difference]: Without dead ends: 82 [2021-07-13 19:45:26,296 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 237.9ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:26,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-07-13 19:45:26,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2021-07-13 19:45:26,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:26,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-07-13 19:45:26,297 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-07-13 19:45:26,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:26,297 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-07-13 19:45:26,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:26,297 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-07-13 19:45:26,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:26,297 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:26,297 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:26,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4001 [2021-07-13 19:45:26,498 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:26,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:26,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1467240342, now seen corresponding path program 200 times [2021-07-13 19:45:26,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:26,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338998275] [2021-07-13 19:45:26,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:26,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:26,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:26,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:26,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338998275] [2021-07-13 19:45:26,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338998275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:26,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26102637] [2021-07-13 19:45:26,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:26,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:26,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:26,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:26,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:26,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-13 19:45:26,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:26,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-13 19:45:26,674 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:26,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:26,680 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:26,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:45:26,681 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-07-13 19:45:26,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:26,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26102637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:26,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:26,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:45:26,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005115951] [2021-07-13 19:45:26,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:45:26,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:26,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:45:26,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:45:26,703 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:26,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:26,808 INFO L93 Difference]: Finished difference Result 90 states and 181 transitions. [2021-07-13 19:45:26,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:26,808 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:26,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:26,808 INFO L225 Difference]: With dead ends: 90 [2021-07-13 19:45:26,809 INFO L226 Difference]: Without dead ends: 90 [2021-07-13 19:45:26,809 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 141.7ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:26,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-07-13 19:45:26,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2021-07-13 19:45:26,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:26,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-07-13 19:45:26,810 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-07-13 19:45:26,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:26,810 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-07-13 19:45:26,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:26,810 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-07-13 19:45:26,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:26,810 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:26,810 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:27,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4010 [2021-07-13 19:45:27,011 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:27,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:27,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1862062545, now seen corresponding path program 201 times [2021-07-13 19:45:27,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:27,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291647483] [2021-07-13 19:45:27,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:27,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:27,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:27,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:27,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291647483] [2021-07-13 19:45:27,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291647483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:27,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361287033] [2021-07-13 19:45:27,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:27,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:45:27,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:27,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:27,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:27,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:45:27,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:27,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-13 19:45:27,255 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:27,257 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:45:27,258 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:27,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:27,261 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:27,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:27,264 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:27,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:45:27,266 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:27,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:27,291 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:27,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:45:27,292 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-07-13 19:45:27,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:27,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361287033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:27,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:27,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:27,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137601005] [2021-07-13 19:45:27,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:27,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:27,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:27,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:27,331 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:27,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:27,476 INFO L93 Difference]: Finished difference Result 86 states and 169 transitions. [2021-07-13 19:45:27,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:45:27,477 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:27,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:27,477 INFO L225 Difference]: With dead ends: 86 [2021-07-13 19:45:27,477 INFO L226 Difference]: Without dead ends: 80 [2021-07-13 19:45:27,477 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 225.1ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:45:27,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-07-13 19:45:27,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-07-13 19:45:27,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 78 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:27,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 159 transitions. [2021-07-13 19:45:27,478 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 159 transitions. Word has length 17 [2021-07-13 19:45:27,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:27,478 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 159 transitions. [2021-07-13 19:45:27,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:27,478 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 159 transitions. [2021-07-13 19:45:27,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:27,478 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:27,479 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:27,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4013,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:27,679 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:27,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:27,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1119941168, now seen corresponding path program 202 times [2021-07-13 19:45:27,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:27,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795029745] [2021-07-13 19:45:27,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:27,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:27,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:27,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:27,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795029745] [2021-07-13 19:45:27,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795029745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:27,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55470777] [2021-07-13 19:45:27,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:27,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:27,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:27,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:27,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:27,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-13 19:45:27,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:27,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-13 19:45:27,879 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:27,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:27,886 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:27,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:45:27,887 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-07-13 19:45:27,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:27,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55470777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:27,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:27,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:27,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208315606] [2021-07-13 19:45:27,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:27,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:27,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:27,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:27,911 INFO L87 Difference]: Start difference. First operand 79 states and 159 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:28,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:28,021 INFO L93 Difference]: Finished difference Result 103 states and 207 transitions. [2021-07-13 19:45:28,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:28,021 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:28,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:28,021 INFO L225 Difference]: With dead ends: 103 [2021-07-13 19:45:28,021 INFO L226 Difference]: Without dead ends: 103 [2021-07-13 19:45:28,021 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 168.1ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:28,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-07-13 19:45:28,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 79. [2021-07-13 19:45:28,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 78 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:28,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 159 transitions. [2021-07-13 19:45:28,022 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 159 transitions. Word has length 17 [2021-07-13 19:45:28,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:28,023 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 159 transitions. [2021-07-13 19:45:28,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:28,023 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 159 transitions. [2021-07-13 19:45:28,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:28,023 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:28,023 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:28,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4022 [2021-07-13 19:45:28,223 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:28,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:28,224 INFO L82 PathProgramCache]: Analyzing trace with hash -2102508693, now seen corresponding path program 203 times [2021-07-13 19:45:28,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:28,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263868624] [2021-07-13 19:45:28,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:28,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:28,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:28,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263868624] [2021-07-13 19:45:28,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263868624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:28,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255913053] [2021-07-13 19:45:28,314 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:28,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:45:28,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:28,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:28,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:28,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:28,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:28,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:28,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:28,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:28,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:28,467 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:28,495 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:45:28,496 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:28,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:28,496 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:45:28,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:28,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255913053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:28,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:28,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:45:28,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957579414] [2021-07-13 19:45:28,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:45:28,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:28,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:45:28,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:28,540 INFO L87 Difference]: Start difference. First operand 79 states and 159 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:28,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:28,728 INFO L93 Difference]: Finished difference Result 107 states and 206 transitions. [2021-07-13 19:45:28,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:45:28,728 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:28,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:28,729 INFO L225 Difference]: With dead ends: 107 [2021-07-13 19:45:28,729 INFO L226 Difference]: Without dead ends: 104 [2021-07-13 19:45:28,729 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 238.7ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:45:28,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-07-13 19:45:28,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2021-07-13 19:45:28,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 83 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:28,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 171 transitions. [2021-07-13 19:45:28,730 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 171 transitions. Word has length 17 [2021-07-13 19:45:28,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:28,730 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 171 transitions. [2021-07-13 19:45:28,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:28,730 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 171 transitions. [2021-07-13 19:45:28,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:28,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:28,730 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:28,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4025,207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:28,931 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:28,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:28,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1939303338, now seen corresponding path program 204 times [2021-07-13 19:45:28,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:28,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127587433] [2021-07-13 19:45:28,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:28,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:29,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:29,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:29,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127587433] [2021-07-13 19:45:29,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127587433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:29,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146442676] [2021-07-13 19:45:29,019 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:29,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:45:29,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:29,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:29,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:29,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:29,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:29,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:45:29,122 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:29,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:29,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:29,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:29,126 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:29,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:29,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:29,129 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:29,163 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-07-13 19:45:29,163 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:29,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:29,164 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:45:29,201 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:29,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146442676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:29,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:29,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:45:29,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152409359] [2021-07-13 19:45:29,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:45:29,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:29,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:45:29,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:29,202 INFO L87 Difference]: Start difference. First operand 84 states and 171 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:29,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:29,313 INFO L93 Difference]: Finished difference Result 117 states and 229 transitions. [2021-07-13 19:45:29,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:29,313 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:29,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:29,314 INFO L225 Difference]: With dead ends: 117 [2021-07-13 19:45:29,314 INFO L226 Difference]: Without dead ends: 117 [2021-07-13 19:45:29,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 152.6ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:45:29,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-07-13 19:45:29,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 84. [2021-07-13 19:45:29,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 83 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:29,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 171 transitions. [2021-07-13 19:45:29,315 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 171 transitions. Word has length 17 [2021-07-13 19:45:29,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:29,315 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 171 transitions. [2021-07-13 19:45:29,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:29,315 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 171 transitions. [2021-07-13 19:45:29,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:29,315 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:29,315 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:29,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4043 [2021-07-13 19:45:29,516 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:29,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:29,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1491965615, now seen corresponding path program 205 times [2021-07-13 19:45:29,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:29,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28650361] [2021-07-13 19:45:29,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:29,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:29,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:29,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:29,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28650361] [2021-07-13 19:45:29,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28650361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:29,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147354281] [2021-07-13 19:45:29,628 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:29,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:29,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:29,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:29,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:29,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:29,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:29,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:29,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:29,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:29,761 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:29,790 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:45:29,790 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:29,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:29,791 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:45:29,826 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:29,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147354281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:29,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:29,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:45:29,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074399790] [2021-07-13 19:45:29,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:45:29,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:29,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:45:29,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:29,827 INFO L87 Difference]: Start difference. First operand 84 states and 171 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:29,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:29,997 INFO L93 Difference]: Finished difference Result 92 states and 185 transitions. [2021-07-13 19:45:29,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:45:29,997 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:29,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:29,997 INFO L225 Difference]: With dead ends: 92 [2021-07-13 19:45:29,997 INFO L226 Difference]: Without dead ends: 92 [2021-07-13 19:45:29,997 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 249.6ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:45:29,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-13 19:45:29,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2021-07-13 19:45:29,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.050632911392405) internal successors, (162), 79 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:29,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2021-07-13 19:45:29,998 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 17 [2021-07-13 19:45:29,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:29,999 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2021-07-13 19:45:29,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:29,999 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2021-07-13 19:45:29,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:29,999 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:29,999 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:30,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4053 [2021-07-13 19:45:30,199 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:30,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:30,200 INFO L82 PathProgramCache]: Analyzing trace with hash -490831630, now seen corresponding path program 206 times [2021-07-13 19:45:30,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:30,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733495177] [2021-07-13 19:45:30,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:30,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:30,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:30,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:30,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733495177] [2021-07-13 19:45:30,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733495177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:30,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340610124] [2021-07-13 19:45:30,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:30,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:30,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:30,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:30,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:30,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:30,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:30,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:30,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:30,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:30,408 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:30,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:30,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:30,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:30,412 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:30,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:45:30,415 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:30,448 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-07-13 19:45:30,448 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:30,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:30,449 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:45:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:30,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340610124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:30,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:30,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:45:30,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269251541] [2021-07-13 19:45:30,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:45:30,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:30,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:45:30,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:30,508 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:30,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:30,710 INFO L93 Difference]: Finished difference Result 94 states and 187 transitions. [2021-07-13 19:45:30,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:45:30,710 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:30,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:30,710 INFO L225 Difference]: With dead ends: 94 [2021-07-13 19:45:30,710 INFO L226 Difference]: Without dead ends: 92 [2021-07-13 19:45:30,710 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 241.4ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:45:30,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-13 19:45:30,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 77. [2021-07-13 19:45:30,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.039473684210526) internal successors, (155), 76 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:30,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 155 transitions. [2021-07-13 19:45:30,711 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 155 transitions. Word has length 17 [2021-07-13 19:45:30,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:30,711 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 155 transitions. [2021-07-13 19:45:30,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:30,712 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 155 transitions. [2021-07-13 19:45:30,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:30,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:30,712 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:30,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4069,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:30,912 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:30,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:30,913 INFO L82 PathProgramCache]: Analyzing trace with hash -821826747, now seen corresponding path program 207 times [2021-07-13 19:45:30,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:30,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105024324] [2021-07-13 19:45:30,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:31,024 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:31,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:31,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105024324] [2021-07-13 19:45:31,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105024324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:31,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843761540] [2021-07-13 19:45:31,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:31,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:45:31,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:31,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:31,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:31,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:45:31,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:31,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-13 19:45:31,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:31,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:31,147 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:31,150 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:45:31,150 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:31,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:45:31,153 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:31,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:31,156 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:31,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:31,180 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:31,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:45:31,182 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-07-13 19:45:31,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:31,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843761540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:31,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:31,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:45:31,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616131788] [2021-07-13 19:45:31,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:45:31,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:31,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:45:31,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:45:31,221 INFO L87 Difference]: Start difference. First operand 77 states and 155 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:31,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:31,317 INFO L93 Difference]: Finished difference Result 85 states and 167 transitions. [2021-07-13 19:45:31,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:45:31,317 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:31,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:31,317 INFO L225 Difference]: With dead ends: 85 [2021-07-13 19:45:31,317 INFO L226 Difference]: Without dead ends: 79 [2021-07-13 19:45:31,317 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 178.5ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:31,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-07-13 19:45:31,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-07-13 19:45:31,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 78 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:31,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 159 transitions. [2021-07-13 19:45:31,319 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 159 transitions. Word has length 17 [2021-07-13 19:45:31,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:31,319 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 159 transitions. [2021-07-13 19:45:31,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:31,319 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 159 transitions. [2021-07-13 19:45:31,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:31,319 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:31,319 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:31,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4081,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:31,520 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:31,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:31,520 INFO L82 PathProgramCache]: Analyzing trace with hash -79705370, now seen corresponding path program 208 times [2021-07-13 19:45:31,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:31,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370047244] [2021-07-13 19:45:31,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:31,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:31,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:31,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:31,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370047244] [2021-07-13 19:45:31,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370047244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:31,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543852550] [2021-07-13 19:45:31,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:31,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:31,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:31,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:31,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:31,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-13 19:45:31,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:31,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-13 19:45:31,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:31,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:31,771 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:31,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:45:31,772 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-07-13 19:45:31,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:31,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543852550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:31,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:31,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:45:31,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225101351] [2021-07-13 19:45:31,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:45:31,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:31,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:45:31,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:45:31,799 INFO L87 Difference]: Start difference. First operand 79 states and 159 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:31,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:31,910 INFO L93 Difference]: Finished difference Result 87 states and 175 transitions. [2021-07-13 19:45:31,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:31,911 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:31,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:31,911 INFO L225 Difference]: With dead ends: 87 [2021-07-13 19:45:31,911 INFO L226 Difference]: Without dead ends: 87 [2021-07-13 19:45:31,912 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 201.8ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:31,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-07-13 19:45:31,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2021-07-13 19:45:31,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 78 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:31,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 159 transitions. [2021-07-13 19:45:31,913 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 159 transitions. Word has length 17 [2021-07-13 19:45:31,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:31,913 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 159 transitions. [2021-07-13 19:45:31,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:31,913 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 159 transitions. [2021-07-13 19:45:31,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:31,913 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:31,913 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:32,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4090,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:32,119 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:32,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:32,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1062272895, now seen corresponding path program 209 times [2021-07-13 19:45:32,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:32,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800007298] [2021-07-13 19:45:32,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:32,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:32,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:32,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:32,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800007298] [2021-07-13 19:45:32,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800007298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:32,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523088852] [2021-07-13 19:45:32,219 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:32,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:45:32,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:32,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:32,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:32,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:32,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:32,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:32,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:32,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:32,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:32,335 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:32,363 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:45:32,363 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:32,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:32,364 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:45:32,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:32,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523088852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:32,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:32,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:32,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541968051] [2021-07-13 19:45:32,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:32,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:32,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:32,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:32,407 INFO L87 Difference]: Start difference. First operand 79 states and 159 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:32,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:32,564 INFO L93 Difference]: Finished difference Result 107 states and 206 transitions. [2021-07-13 19:45:32,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:45:32,564 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:32,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:32,565 INFO L225 Difference]: With dead ends: 107 [2021-07-13 19:45:32,565 INFO L226 Difference]: Without dead ends: 104 [2021-07-13 19:45:32,565 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 222.1ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:45:32,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-07-13 19:45:32,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2021-07-13 19:45:32,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 83 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:32,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 171 transitions. [2021-07-13 19:45:32,566 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 171 transitions. Word has length 17 [2021-07-13 19:45:32,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:32,566 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 171 transitions. [2021-07-13 19:45:32,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:32,566 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 171 transitions. [2021-07-13 19:45:32,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:32,566 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:32,567 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:32,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4093,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:32,767 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:32,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:32,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1315428160, now seen corresponding path program 210 times [2021-07-13 19:45:32,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:32,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890520355] [2021-07-13 19:45:32,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:32,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:32,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:32,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:32,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890520355] [2021-07-13 19:45:32,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890520355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:32,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400605682] [2021-07-13 19:45:32,882 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:32,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:45:32,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:32,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:32,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:32,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:32,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:32,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:32,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:32,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:45:32,971 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:32,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:32,974 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:32,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:32,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:32,982 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:33,016 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-07-13 19:45:33,016 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:33,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:33,017 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:45:33,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:33,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400605682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:33,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:33,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:33,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485756316] [2021-07-13 19:45:33,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:33,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:33,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:33,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:33,055 INFO L87 Difference]: Start difference. First operand 84 states and 171 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:33,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:33,140 INFO L93 Difference]: Finished difference Result 113 states and 221 transitions. [2021-07-13 19:45:33,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:33,141 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:33,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:33,141 INFO L225 Difference]: With dead ends: 113 [2021-07-13 19:45:33,141 INFO L226 Difference]: Without dead ends: 113 [2021-07-13 19:45:33,141 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 164.2ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:33,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-07-13 19:45:33,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 84. [2021-07-13 19:45:33,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 83 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:33,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 171 transitions. [2021-07-13 19:45:33,142 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 171 transitions. Word has length 17 [2021-07-13 19:45:33,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:33,143 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 171 transitions. [2021-07-13 19:45:33,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:33,143 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 171 transitions. [2021-07-13 19:45:33,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:33,143 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:33,143 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:33,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4111 [2021-07-13 19:45:33,343 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:33,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:33,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1762765883, now seen corresponding path program 211 times [2021-07-13 19:45:33,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:33,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666625647] [2021-07-13 19:45:33,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:33,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:33,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:33,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:33,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666625647] [2021-07-13 19:45:33,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666625647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:33,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849983179] [2021-07-13 19:45:33,447 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:33,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:33,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:33,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:33,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:33,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:33,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:33,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:33,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:33,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:33,572 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:33,601 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:45:33,601 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:33,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:33,602 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:45:33,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:33,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849983179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:33,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:33,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:33,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887455064] [2021-07-13 19:45:33,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:33,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:33,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:33,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:33,638 INFO L87 Difference]: Start difference. First operand 84 states and 171 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:33,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:33,793 INFO L93 Difference]: Finished difference Result 92 states and 185 transitions. [2021-07-13 19:45:33,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:45:33,793 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:33,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:33,794 INFO L225 Difference]: With dead ends: 92 [2021-07-13 19:45:33,794 INFO L226 Difference]: Without dead ends: 92 [2021-07-13 19:45:33,794 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 224.4ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:45:33,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-13 19:45:33,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2021-07-13 19:45:33,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.050632911392405) internal successors, (162), 79 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:33,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2021-07-13 19:45:33,795 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 17 [2021-07-13 19:45:33,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:33,795 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2021-07-13 19:45:33,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:33,795 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2021-07-13 19:45:33,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:33,795 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:33,795 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:33,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4121 [2021-07-13 19:45:33,996 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:33,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:33,996 INFO L82 PathProgramCache]: Analyzing trace with hash 549404168, now seen corresponding path program 212 times [2021-07-13 19:45:33,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:33,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756047476] [2021-07-13 19:45:33,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:33,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:34,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:34,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:34,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756047476] [2021-07-13 19:45:34,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756047476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:34,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214708437] [2021-07-13 19:45:34,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:34,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:34,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:34,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:34,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:34,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:45:34,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:34,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:34,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:34,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:34,185 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:34,187 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:45:34,187 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:34,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:34,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:34,190 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:34,222 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-07-13 19:45:34,223 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:34,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:34,224 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:45:34,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:34,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214708437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:34,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:34,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:34,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750185130] [2021-07-13 19:45:34,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:34,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:34,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:34,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:34,281 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:34,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:34,445 INFO L93 Difference]: Finished difference Result 90 states and 179 transitions. [2021-07-13 19:45:34,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:45:34,445 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:34,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:34,445 INFO L225 Difference]: With dead ends: 90 [2021-07-13 19:45:34,445 INFO L226 Difference]: Without dead ends: 88 [2021-07-13 19:45:34,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 225.0ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:45:34,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-07-13 19:45:34,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2021-07-13 19:45:34,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:34,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-07-13 19:45:34,446 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-07-13 19:45:34,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:34,447 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-07-13 19:45:34,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:34,447 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-07-13 19:45:34,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:34,447 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:34,447 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:34,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4137,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:34,647 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:34,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:34,648 INFO L82 PathProgramCache]: Analyzing trace with hash -474527573, now seen corresponding path program 213 times [2021-07-13 19:45:34,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:34,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128686069] [2021-07-13 19:45:34,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:34,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:34,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:34,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:34,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128686069] [2021-07-13 19:45:34,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128686069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:34,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088412918] [2021-07-13 19:45:34,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:34,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:45:34,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:34,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:34,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:34,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:34,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:34,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:34,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:34,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:34,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:34,845 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:34,876 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:45:34,876 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:34,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:34,877 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:45:34,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:34,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088412918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:34,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:34,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:34,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747098758] [2021-07-13 19:45:34,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:34,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:34,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:34,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:34,920 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:35,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:35,122 INFO L93 Difference]: Finished difference Result 112 states and 216 transitions. [2021-07-13 19:45:35,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:45:35,122 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:35,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:35,123 INFO L225 Difference]: With dead ends: 112 [2021-07-13 19:45:35,123 INFO L226 Difference]: Without dead ends: 109 [2021-07-13 19:45:35,123 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 233.1ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:45:35,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-07-13 19:45:35,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2021-07-13 19:45:35,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 84 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:35,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 175 transitions. [2021-07-13 19:45:35,124 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 175 transitions. Word has length 17 [2021-07-13 19:45:35,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:35,124 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 175 transitions. [2021-07-13 19:45:35,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:35,124 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 175 transitions. [2021-07-13 19:45:35,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:35,124 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:35,124 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:35,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4150 [2021-07-13 19:45:35,325 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:35,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:35,325 INFO L82 PathProgramCache]: Analyzing trace with hash -727682838, now seen corresponding path program 214 times [2021-07-13 19:45:35,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:35,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608035993] [2021-07-13 19:45:35,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:35,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:35,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:35,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:35,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608035993] [2021-07-13 19:45:35,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608035993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:35,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378083194] [2021-07-13 19:45:35,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:35,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:35,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:35,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:35,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:35,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:35,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:35,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:35,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:35,566 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:35,606 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-07-13 19:45:35,606 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:35,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:45:35,609 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:35,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:35,623 INFO L518 ElimStorePlain]: Eliminatee v_prenex_127 vanished before elimination [2021-07-13 19:45:35,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:35,624 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:45:35,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:35,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378083194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:35,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:35,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:35,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722585425] [2021-07-13 19:45:35,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:35,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:35,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:35,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:35,671 INFO L87 Difference]: Start difference. First operand 85 states and 175 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:35,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:35,774 INFO L93 Difference]: Finished difference Result 104 states and 204 transitions. [2021-07-13 19:45:35,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:35,775 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:35,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:35,775 INFO L225 Difference]: With dead ends: 104 [2021-07-13 19:45:35,775 INFO L226 Difference]: Without dead ends: 104 [2021-07-13 19:45:35,775 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 172.9ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:35,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-07-13 19:45:35,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 85. [2021-07-13 19:45:35,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 84 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:35,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 175 transitions. [2021-07-13 19:45:35,776 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 175 transitions. Word has length 17 [2021-07-13 19:45:35,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:35,776 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 175 transitions. [2021-07-13 19:45:35,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:35,776 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 175 transitions. [2021-07-13 19:45:35,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:35,777 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:35,777 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:35,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4160,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:35,977 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:35,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:35,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1175020561, now seen corresponding path program 215 times [2021-07-13 19:45:35,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:35,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103277015] [2021-07-13 19:45:35,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:35,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:36,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:36,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:36,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103277015] [2021-07-13 19:45:36,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103277015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:36,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786407251] [2021-07-13 19:45:36,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:36,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:45:36,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:36,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:36,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:36,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:36,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:36,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:36,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:36,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:36,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:36,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:36,215 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:45:36,215 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:36,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:36,216 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:45:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:36,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786407251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:36,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:36,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:36,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491593849] [2021-07-13 19:45:36,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:36,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:36,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:36,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:36,252 INFO L87 Difference]: Start difference. First operand 85 states and 175 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:36,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:36,393 INFO L93 Difference]: Finished difference Result 112 states and 219 transitions. [2021-07-13 19:45:36,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:45:36,394 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:36,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:36,394 INFO L225 Difference]: With dead ends: 112 [2021-07-13 19:45:36,394 INFO L226 Difference]: Without dead ends: 112 [2021-07-13 19:45:36,394 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 196.3ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:36,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-07-13 19:45:36,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 85. [2021-07-13 19:45:36,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 84 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:36,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 175 transitions. [2021-07-13 19:45:36,395 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 175 transitions. Word has length 17 [2021-07-13 19:45:36,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:36,395 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 175 transitions. [2021-07-13 19:45:36,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:36,395 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 175 transitions. [2021-07-13 19:45:36,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:36,396 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:36,396 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:36,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4177 [2021-07-13 19:45:36,596 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:36,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:36,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1137149490, now seen corresponding path program 216 times [2021-07-13 19:45:36,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:36,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139349267] [2021-07-13 19:45:36,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:36,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:36,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:36,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:36,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139349267] [2021-07-13 19:45:36,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139349267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:36,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695460726] [2021-07-13 19:45:36,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:36,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:45:36,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:36,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:36,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:36,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:36,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:36,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:36,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:36,831 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:36,871 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-07-13 19:45:36,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:45:36,874 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:36,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:36,888 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:36,888 INFO L518 ElimStorePlain]: Eliminatee v_prenex_130 vanished before elimination [2021-07-13 19:45:36,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:36,889 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:45:36,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:36,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695460726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:36,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:36,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:36,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714473240] [2021-07-13 19:45:36,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:36,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:36,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:36,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:36,956 INFO L87 Difference]: Start difference. First operand 85 states and 175 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:37,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:37,095 INFO L93 Difference]: Finished difference Result 106 states and 205 transitions. [2021-07-13 19:45:37,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:45:37,095 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:37,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:37,096 INFO L225 Difference]: With dead ends: 106 [2021-07-13 19:45:37,096 INFO L226 Difference]: Without dead ends: 104 [2021-07-13 19:45:37,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 222.2ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:37,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-07-13 19:45:37,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2021-07-13 19:45:37,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.072289156626506) internal successors, (172), 83 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:37,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 172 transitions. [2021-07-13 19:45:37,097 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 172 transitions. Word has length 17 [2021-07-13 19:45:37,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:37,097 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 172 transitions. [2021-07-13 19:45:37,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:37,097 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 172 transitions. [2021-07-13 19:45:37,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:37,097 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:37,097 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:37,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4185 [2021-07-13 19:45:37,309 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:37,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:37,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1710250363, now seen corresponding path program 217 times [2021-07-13 19:45:37,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:37,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862650961] [2021-07-13 19:45:37,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:37,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:37,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:37,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862650961] [2021-07-13 19:45:37,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862650961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:37,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065421719] [2021-07-13 19:45:37,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:37,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:37,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:37,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:37,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:37,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065421719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:37,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:37,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:45:37,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415676452] [2021-07-13 19:45:37,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:45:37,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:37,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:45:37,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:45:37,530 INFO L87 Difference]: Start difference. First operand 84 states and 172 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:37,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:37,636 INFO L93 Difference]: Finished difference Result 90 states and 181 transitions. [2021-07-13 19:45:37,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:37,636 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:37,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:37,636 INFO L225 Difference]: With dead ends: 90 [2021-07-13 19:45:37,637 INFO L226 Difference]: Without dead ends: 90 [2021-07-13 19:45:37,637 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 167.1ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:37,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-07-13 19:45:37,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2021-07-13 19:45:37,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.051282051282051) internal successors, (160), 78 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:37,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 160 transitions. [2021-07-13 19:45:37,642 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 160 transitions. Word has length 17 [2021-07-13 19:45:37,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:37,642 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 160 transitions. [2021-07-13 19:45:37,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:37,642 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 160 transitions. [2021-07-13 19:45:37,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:37,642 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:37,642 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:37,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4205,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:37,843 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:37,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:37,843 INFO L82 PathProgramCache]: Analyzing trace with hash -2082106650, now seen corresponding path program 218 times [2021-07-13 19:45:37,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:37,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665889186] [2021-07-13 19:45:37,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:37,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:37,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:37,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:37,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665889186] [2021-07-13 19:45:37,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665889186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:37,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97172713] [2021-07-13 19:45:37,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:37,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:37,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:37,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:37,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:38,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:38,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97172713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:38,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:38,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:45:38,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176628192] [2021-07-13 19:45:38,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:45:38,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:38,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:45:38,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:45:38,072 INFO L87 Difference]: Start difference. First operand 79 states and 160 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:38,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:38,192 INFO L93 Difference]: Finished difference Result 83 states and 164 transitions. [2021-07-13 19:45:38,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:45:38,192 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:38,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:38,192 INFO L225 Difference]: With dead ends: 83 [2021-07-13 19:45:38,192 INFO L226 Difference]: Without dead ends: 79 [2021-07-13 19:45:38,193 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 197.7ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:38,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-07-13 19:45:38,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2021-07-13 19:45:38,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.04) internal successors, (153), 75 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:38,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 153 transitions. [2021-07-13 19:45:38,194 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 153 transitions. Word has length 17 [2021-07-13 19:45:38,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:38,194 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 153 transitions. [2021-07-13 19:45:38,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:38,194 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 153 transitions. [2021-07-13 19:45:38,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:38,195 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:38,195 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:38,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4208 [2021-07-13 19:45:38,417 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:38,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:38,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1360711919, now seen corresponding path program 219 times [2021-07-13 19:45:38,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:38,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967865406] [2021-07-13 19:45:38,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:38,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:38,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:38,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:38,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967865406] [2021-07-13 19:45:38,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967865406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:38,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284515274] [2021-07-13 19:45:38,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:38,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:45:38,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:38,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:38,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:38,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:45:38,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:38,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-13 19:45:38,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:38,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:38,654 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:38,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:38,657 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:38,660 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:45:38,660 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:38,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:45:38,663 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:38,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:38,688 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:38,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:45:38,689 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-07-13 19:45:38,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:38,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284515274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:38,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:38,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:45:38,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844145023] [2021-07-13 19:45:38,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:45:38,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:38,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:45:38,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:45:38,743 INFO L87 Difference]: Start difference. First operand 76 states and 153 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:38,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:38,838 INFO L93 Difference]: Finished difference Result 85 states and 167 transitions. [2021-07-13 19:45:38,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:45:38,838 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:38,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:38,839 INFO L225 Difference]: With dead ends: 85 [2021-07-13 19:45:38,839 INFO L226 Difference]: Without dead ends: 79 [2021-07-13 19:45:38,839 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 190.3ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:38,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-07-13 19:45:38,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-07-13 19:45:38,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 78 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:38,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 159 transitions. [2021-07-13 19:45:38,840 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 159 transitions. Word has length 17 [2021-07-13 19:45:38,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:38,840 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 159 transitions. [2021-07-13 19:45:38,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:38,840 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 159 transitions. [2021-07-13 19:45:38,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:38,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:38,840 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:39,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4215,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:39,041 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:39,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:39,041 INFO L82 PathProgramCache]: Analyzing trace with hash 2102833296, now seen corresponding path program 220 times [2021-07-13 19:45:39,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:39,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494554249] [2021-07-13 19:45:39,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:39,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:39,159 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:39,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:39,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494554249] [2021-07-13 19:45:39,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494554249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:39,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063226656] [2021-07-13 19:45:39,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:39,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:39,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:39,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:39,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:39,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-13 19:45:39,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:39,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-13 19:45:39,261 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:39,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:39,268 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:39,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:45:39,269 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-07-13 19:45:39,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:39,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063226656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:39,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:39,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:45:39,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939521332] [2021-07-13 19:45:39,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:45:39,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:39,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:45:39,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:45:39,292 INFO L87 Difference]: Start difference. First operand 79 states and 159 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:39,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:39,379 INFO L93 Difference]: Finished difference Result 87 states and 175 transitions. [2021-07-13 19:45:39,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:39,380 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:39,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:39,380 INFO L225 Difference]: With dead ends: 87 [2021-07-13 19:45:39,380 INFO L226 Difference]: Without dead ends: 87 [2021-07-13 19:45:39,380 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 167.3ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:39,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-07-13 19:45:39,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2021-07-13 19:45:39,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 78 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:39,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 159 transitions. [2021-07-13 19:45:39,382 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 159 transitions. Word has length 17 [2021-07-13 19:45:39,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:39,382 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 159 transitions. [2021-07-13 19:45:39,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:39,382 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 159 transitions. [2021-07-13 19:45:39,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:39,382 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:39,382 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:39,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4224,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:39,605 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:39,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:39,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1120265771, now seen corresponding path program 221 times [2021-07-13 19:45:39,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:39,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314324625] [2021-07-13 19:45:39,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:39,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:39,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:39,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:39,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314324625] [2021-07-13 19:45:39,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314324625] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:39,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143853149] [2021-07-13 19:45:39,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:39,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:45:39,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:39,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:39,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:39,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:39,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:39,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:39,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:39,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:39,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:39,842 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:39,880 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:45:39,880 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:39,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:39,881 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:45:39,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:39,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143853149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:39,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:39,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:39,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224927714] [2021-07-13 19:45:39,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:39,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:39,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:39,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:39,929 INFO L87 Difference]: Start difference. First operand 79 states and 159 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:40,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:40,120 INFO L93 Difference]: Finished difference Result 106 states and 204 transitions. [2021-07-13 19:45:40,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:45:40,120 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:40,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:40,121 INFO L225 Difference]: With dead ends: 106 [2021-07-13 19:45:40,121 INFO L226 Difference]: Without dead ends: 103 [2021-07-13 19:45:40,121 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 241.0ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:45:40,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-07-13 19:45:40,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 84. [2021-07-13 19:45:40,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 83 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:40,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 171 transitions. [2021-07-13 19:45:40,122 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 171 transitions. Word has length 17 [2021-07-13 19:45:40,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:40,122 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 171 transitions. [2021-07-13 19:45:40,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:40,122 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 171 transitions. [2021-07-13 19:45:40,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:40,122 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:40,122 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:40,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4227,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:40,323 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:40,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:40,323 INFO L82 PathProgramCache]: Analyzing trace with hash 867110506, now seen corresponding path program 222 times [2021-07-13 19:45:40,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:40,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459335637] [2021-07-13 19:45:40,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:40,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:40,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:40,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:40,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459335637] [2021-07-13 19:45:40,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459335637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:40,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643190356] [2021-07-13 19:45:40,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:40,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:45:40,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:40,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:40,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:40,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:40,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:40,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:45:40,514 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:40,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:40,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:40,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:40,517 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:40,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:40,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:40,520 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:40,554 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-07-13 19:45:40,554 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:40,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:40,556 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:45:40,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:40,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643190356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:40,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:40,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:40,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548251650] [2021-07-13 19:45:40,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:40,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:40,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:40,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:40,594 INFO L87 Difference]: Start difference. First operand 84 states and 171 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:40,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:40,702 INFO L93 Difference]: Finished difference Result 113 states and 221 transitions. [2021-07-13 19:45:40,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:40,703 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:40,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:40,703 INFO L225 Difference]: With dead ends: 113 [2021-07-13 19:45:40,703 INFO L226 Difference]: Without dead ends: 113 [2021-07-13 19:45:40,703 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 155.0ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:40,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-07-13 19:45:40,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 84. [2021-07-13 19:45:40,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 83 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:40,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 171 transitions. [2021-07-13 19:45:40,704 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 171 transitions. Word has length 17 [2021-07-13 19:45:40,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:40,704 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 171 transitions. [2021-07-13 19:45:40,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:40,705 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 171 transitions. [2021-07-13 19:45:40,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:40,705 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:40,705 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:40,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4245,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:40,905 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:40,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:40,906 INFO L82 PathProgramCache]: Analyzing trace with hash 419772783, now seen corresponding path program 223 times [2021-07-13 19:45:40,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:40,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258884670] [2021-07-13 19:45:40,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:40,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:41,005 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:41,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:41,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258884670] [2021-07-13 19:45:41,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258884670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:41,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580744961] [2021-07-13 19:45:41,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:41,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:41,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:41,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:41,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:41,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:41,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:41,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:41,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:41,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:41,121 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:41,149 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:45:41,150 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:41,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:41,151 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:45:41,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:41,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580744961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:41,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:41,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:41,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480618573] [2021-07-13 19:45:41,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:41,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:41,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:41,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:41,187 INFO L87 Difference]: Start difference. First operand 84 states and 171 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:41,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:41,345 INFO L93 Difference]: Finished difference Result 91 states and 183 transitions. [2021-07-13 19:45:41,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:45:41,346 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:41,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:41,346 INFO L225 Difference]: With dead ends: 91 [2021-07-13 19:45:41,346 INFO L226 Difference]: Without dead ends: 91 [2021-07-13 19:45:41,346 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 213.7ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:45:41,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-07-13 19:45:41,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2021-07-13 19:45:41,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.050632911392405) internal successors, (162), 79 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:41,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2021-07-13 19:45:41,347 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 17 [2021-07-13 19:45:41,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:41,347 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2021-07-13 19:45:41,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:41,347 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2021-07-13 19:45:41,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:41,347 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:41,348 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:41,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4255 [2021-07-13 19:45:41,548 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:41,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:41,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1563024462, now seen corresponding path program 224 times [2021-07-13 19:45:41,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:41,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411941406] [2021-07-13 19:45:41,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:41,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:41,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:41,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:41,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411941406] [2021-07-13 19:45:41,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411941406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:41,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545394092] [2021-07-13 19:45:41,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:41,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:41,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:41,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:41,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:41,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:41,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:41,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:45:41,762 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:41,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:41,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:41,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:41,766 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:41,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:41,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:41,769 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:41,803 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-07-13 19:45:41,803 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:41,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:41,804 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:45:41,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:41,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545394092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:41,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:41,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:41,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603295653] [2021-07-13 19:45:41,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:41,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:41,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:41,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:41,862 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:42,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:42,025 INFO L93 Difference]: Finished difference Result 90 states and 179 transitions. [2021-07-13 19:45:42,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:45:42,025 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:42,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:42,025 INFO L225 Difference]: With dead ends: 90 [2021-07-13 19:45:42,026 INFO L226 Difference]: Without dead ends: 88 [2021-07-13 19:45:42,026 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 220.6ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:45:42,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-07-13 19:45:42,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2021-07-13 19:45:42,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:42,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-07-13 19:45:42,027 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-07-13 19:45:42,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:42,027 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-07-13 19:45:42,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:42,027 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-07-13 19:45:42,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:42,027 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:42,027 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:42,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4271,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:42,228 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:42,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:42,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1708011093, now seen corresponding path program 225 times [2021-07-13 19:45:42,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:42,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714153089] [2021-07-13 19:45:42,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:42,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:42,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:42,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:42,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714153089] [2021-07-13 19:45:42,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714153089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:42,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844861333] [2021-07-13 19:45:42,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:42,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:45:42,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:42,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:42,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:42,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:42,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:42,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:42,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:42,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:42,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:42,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:42,462 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:45:42,462 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:42,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:42,463 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:45:42,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:42,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844861333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:42,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:42,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:42,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292711189] [2021-07-13 19:45:42,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:42,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:42,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:42,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:42,507 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:42,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:42,724 INFO L93 Difference]: Finished difference Result 111 states and 214 transitions. [2021-07-13 19:45:42,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:45:42,725 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:42,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:42,725 INFO L225 Difference]: With dead ends: 111 [2021-07-13 19:45:42,725 INFO L226 Difference]: Without dead ends: 108 [2021-07-13 19:45:42,725 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 253.8ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:45:42,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-07-13 19:45:42,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 85. [2021-07-13 19:45:42,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 84 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:42,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 175 transitions. [2021-07-13 19:45:42,726 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 175 transitions. Word has length 17 [2021-07-13 19:45:42,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:42,726 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 175 transitions. [2021-07-13 19:45:42,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:42,727 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 175 transitions. [2021-07-13 19:45:42,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:42,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:42,727 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:42,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4284 [2021-07-13 19:45:42,927 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:42,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:42,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1454855828, now seen corresponding path program 226 times [2021-07-13 19:45:42,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:42,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145297613] [2021-07-13 19:45:42,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:42,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:43,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:43,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:43,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145297613] [2021-07-13 19:45:43,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145297613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:43,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379089923] [2021-07-13 19:45:43,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:43,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:43,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:43,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:43,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:43,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:43,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:43,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:43,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:43,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:45:43,181 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:43,220 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-07-13 19:45:43,220 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:43,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:43,223 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:43,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:43,237 INFO L518 ElimStorePlain]: Eliminatee v_prenex_135 vanished before elimination [2021-07-13 19:45:43,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:43,238 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:45:43,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:43,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379089923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:43,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:43,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:43,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779493940] [2021-07-13 19:45:43,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:43,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:43,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:43,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:43,285 INFO L87 Difference]: Start difference. First operand 85 states and 175 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:43,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:43,392 INFO L93 Difference]: Finished difference Result 104 states and 204 transitions. [2021-07-13 19:45:43,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:43,393 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:43,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:43,393 INFO L225 Difference]: With dead ends: 104 [2021-07-13 19:45:43,393 INFO L226 Difference]: Without dead ends: 104 [2021-07-13 19:45:43,393 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 168.5ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:43,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-07-13 19:45:43,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 85. [2021-07-13 19:45:43,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 84 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:43,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 175 transitions. [2021-07-13 19:45:43,394 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 175 transitions. Word has length 17 [2021-07-13 19:45:43,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:43,394 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 175 transitions. [2021-07-13 19:45:43,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:43,395 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 175 transitions. [2021-07-13 19:45:43,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:43,395 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:43,395 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:43,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4294 [2021-07-13 19:45:43,595 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:43,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:43,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1007518105, now seen corresponding path program 227 times [2021-07-13 19:45:43,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:43,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866812507] [2021-07-13 19:45:43,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:43,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:43,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:43,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866812507] [2021-07-13 19:45:43,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866812507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:43,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766019591] [2021-07-13 19:45:43,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:43,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:45:43,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:43,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:43,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:43,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:43,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:43,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:43,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:43,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:43,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:43,805 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:43,830 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:45:43,831 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:43,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:43,831 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:45:43,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:43,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766019591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:43,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:43,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:43,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305830004] [2021-07-13 19:45:43,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:43,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:43,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:43,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:43,868 INFO L87 Difference]: Start difference. First operand 85 states and 175 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:44,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:44,039 INFO L93 Difference]: Finished difference Result 111 states and 217 transitions. [2021-07-13 19:45:44,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:45:44,039 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:44,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:44,040 INFO L225 Difference]: With dead ends: 111 [2021-07-13 19:45:44,040 INFO L226 Difference]: Without dead ends: 111 [2021-07-13 19:45:44,040 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 220.1ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:45:44,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-07-13 19:45:44,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 85. [2021-07-13 19:45:44,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 84 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:44,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 175 transitions. [2021-07-13 19:45:44,041 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 175 transitions. Word has length 17 [2021-07-13 19:45:44,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:44,041 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 175 transitions. [2021-07-13 19:45:44,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:44,041 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 175 transitions. [2021-07-13 19:45:44,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:44,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:44,042 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:44,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4311,231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:44,242 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:44,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:44,242 INFO L82 PathProgramCache]: Analyzing trace with hash -975279140, now seen corresponding path program 228 times [2021-07-13 19:45:44,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:44,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790459134] [2021-07-13 19:45:44,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:44,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:44,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:44,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790459134] [2021-07-13 19:45:44,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790459134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:44,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447323622] [2021-07-13 19:45:44,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:44,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:45:44,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:44,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:44,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:44,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:44,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:44,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:44,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:44,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:45:44,476 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:44,515 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-07-13 19:45:44,515 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:44,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:44,518 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:44,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:44,532 INFO L518 ElimStorePlain]: Eliminatee v_prenex_137 vanished before elimination [2021-07-13 19:45:44,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:44,533 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:45:44,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:44,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447323622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:44,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:44,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:44,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992504710] [2021-07-13 19:45:44,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:44,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:44,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:44,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:44,601 INFO L87 Difference]: Start difference. First operand 85 states and 175 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:44,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:44,768 INFO L93 Difference]: Finished difference Result 106 states and 205 transitions. [2021-07-13 19:45:44,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:45:44,768 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:44,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:44,769 INFO L225 Difference]: With dead ends: 106 [2021-07-13 19:45:44,769 INFO L226 Difference]: Without dead ends: 104 [2021-07-13 19:45:44,769 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 226.5ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:44,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-07-13 19:45:44,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2021-07-13 19:45:44,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.072289156626506) internal successors, (172), 83 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:44,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 172 transitions. [2021-07-13 19:45:44,770 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 172 transitions. Word has length 17 [2021-07-13 19:45:44,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:44,770 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 172 transitions. [2021-07-13 19:45:44,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:44,770 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 172 transitions. [2021-07-13 19:45:44,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:44,770 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:44,770 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:44,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4319,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:44,971 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:44,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:44,971 INFO L82 PathProgramCache]: Analyzing trace with hash 472288303, now seen corresponding path program 229 times [2021-07-13 19:45:44,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:44,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892598554] [2021-07-13 19:45:44,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:44,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:45,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:45,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:45,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892598554] [2021-07-13 19:45:45,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892598554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:45,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733050577] [2021-07-13 19:45:45,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:45,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:45,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:45,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:45,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733050577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:45,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:45,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:45:45,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146841515] [2021-07-13 19:45:45,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:45:45,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:45,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:45:45,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:45:45,191 INFO L87 Difference]: Start difference. First operand 84 states and 172 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:45,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:45,291 INFO L93 Difference]: Finished difference Result 90 states and 181 transitions. [2021-07-13 19:45:45,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:45,292 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:45,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:45,292 INFO L225 Difference]: With dead ends: 90 [2021-07-13 19:45:45,292 INFO L226 Difference]: Without dead ends: 90 [2021-07-13 19:45:45,292 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 173.2ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:45,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-07-13 19:45:45,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2021-07-13 19:45:45,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.051282051282051) internal successors, (160), 78 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:45,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 160 transitions. [2021-07-13 19:45:45,293 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 160 transitions. Word has length 17 [2021-07-13 19:45:45,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:45,293 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 160 transitions. [2021-07-13 19:45:45,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:45,293 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 160 transitions. [2021-07-13 19:45:45,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:45,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:45,294 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:45,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4339 [2021-07-13 19:45:45,497 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:45,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:45,497 INFO L82 PathProgramCache]: Analyzing trace with hash 100432016, now seen corresponding path program 230 times [2021-07-13 19:45:45,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:45,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103054738] [2021-07-13 19:45:45,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:45,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:45,611 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:45,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:45,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103054738] [2021-07-13 19:45:45,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103054738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:45,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671165549] [2021-07-13 19:45:45,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:45,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:45,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:45,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:45,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:45,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:45,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671165549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:45,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:45,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:45:45,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809957006] [2021-07-13 19:45:45,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:45:45,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:45,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:45:45,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:45:45,748 INFO L87 Difference]: Start difference. First operand 79 states and 160 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:45,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:45,863 INFO L93 Difference]: Finished difference Result 83 states and 164 transitions. [2021-07-13 19:45:45,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:45:45,863 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:45,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:45,864 INFO L225 Difference]: With dead ends: 83 [2021-07-13 19:45:45,864 INFO L226 Difference]: Without dead ends: 79 [2021-07-13 19:45:45,864 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 208.6ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:45,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-07-13 19:45:45,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2021-07-13 19:45:45,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.039473684210526) internal successors, (155), 76 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:45,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 155 transitions. [2021-07-13 19:45:45,865 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 155 transitions. Word has length 17 [2021-07-13 19:45:45,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:45,865 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 155 transitions. [2021-07-13 19:45:45,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:45,865 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 155 transitions. [2021-07-13 19:45:45,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:45,865 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:45,865 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:46,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4342 [2021-07-13 19:45:46,067 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:46,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:46,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1546720405, now seen corresponding path program 231 times [2021-07-13 19:45:46,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:46,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182921231] [2021-07-13 19:45:46,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:46,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:46,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:46,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182921231] [2021-07-13 19:45:46,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182921231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:46,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024284157] [2021-07-13 19:45:46,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:46,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:45:46,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:46,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:46,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:46,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:45:46,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:46,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:46,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:46,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:46,306 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:46,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:46,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:46,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:46,309 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:46,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:46,312 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:46,359 INFO L628 ElimStorePlain]: treesize reduction 58, result has 42.0 percent of original size [2021-07-13 19:45:46,360 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:46,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:46,361 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:129, output treesize:18 [2021-07-13 19:45:46,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:46,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024284157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:46,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:46,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:45:46,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650684125] [2021-07-13 19:45:46,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:45:46,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:46,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:45:46,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:46,406 INFO L87 Difference]: Start difference. First operand 77 states and 155 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:46,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:46,717 INFO L93 Difference]: Finished difference Result 110 states and 212 transitions. [2021-07-13 19:45:46,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:45:46,717 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:46,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:46,718 INFO L225 Difference]: With dead ends: 110 [2021-07-13 19:45:46,718 INFO L226 Difference]: Without dead ends: 107 [2021-07-13 19:45:46,718 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 368.0ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:45:46,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-07-13 19:45:46,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 86. [2021-07-13 19:45:46,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1058823529411765) internal successors, (179), 85 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:46,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 179 transitions. [2021-07-13 19:45:46,719 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 179 transitions. Word has length 17 [2021-07-13 19:45:46,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:46,719 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 179 transitions. [2021-07-13 19:45:46,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:46,719 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 179 transitions. [2021-07-13 19:45:46,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:46,719 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:46,719 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:46,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4348,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:46,920 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:46,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:46,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1799875670, now seen corresponding path program 232 times [2021-07-13 19:45:46,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:46,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110937678] [2021-07-13 19:45:46,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:47,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:47,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:47,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110937678] [2021-07-13 19:45:47,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110937678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:47,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118193012] [2021-07-13 19:45:47,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:47,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:47,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:47,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:47,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:47,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:47,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:47,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:47,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:47,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:45:47,207 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:47,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:47,210 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:47,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:47,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:47,213 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:47,272 INFO L628 ElimStorePlain]: treesize reduction 39, result has 61.0 percent of original size [2021-07-13 19:45:47,272 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:47,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:45:47,274 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:129, output treesize:29 [2021-07-13 19:45:47,323 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:47,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118193012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:47,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:47,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:45:47,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609177167] [2021-07-13 19:45:47,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:45:47,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:47,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:45:47,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:47,324 INFO L87 Difference]: Start difference. First operand 86 states and 179 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:47,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:47,448 INFO L93 Difference]: Finished difference Result 107 states and 211 transitions. [2021-07-13 19:45:47,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:47,448 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:47,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:47,448 INFO L225 Difference]: With dead ends: 107 [2021-07-13 19:45:47,449 INFO L226 Difference]: Without dead ends: 107 [2021-07-13 19:45:47,449 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 192.0ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:45:47,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-07-13 19:45:47,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 86. [2021-07-13 19:45:47,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1058823529411765) internal successors, (179), 85 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:47,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 179 transitions. [2021-07-13 19:45:47,450 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 179 transitions. Word has length 17 [2021-07-13 19:45:47,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:47,450 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 179 transitions. [2021-07-13 19:45:47,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:47,450 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 179 transitions. [2021-07-13 19:45:47,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:47,450 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:47,450 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:47,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4360,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:47,652 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:47,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:47,653 INFO L82 PathProgramCache]: Analyzing trace with hash 2047753903, now seen corresponding path program 233 times [2021-07-13 19:45:47,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:47,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110927628] [2021-07-13 19:45:47,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:47,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:47,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:47,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:47,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110927628] [2021-07-13 19:45:47,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110927628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:47,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005170590] [2021-07-13 19:45:47,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:47,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:45:47,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:47,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:47,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:47,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:47,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:47,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:47,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:47,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:47,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:47,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:45:47,900 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:47,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:47,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:47,903 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:47,944 INFO L628 ElimStorePlain]: treesize reduction 58, result has 42.0 percent of original size [2021-07-13 19:45:47,944 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:47,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:47,945 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:129, output treesize:18 [2021-07-13 19:45:47,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:47,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005170590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:47,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:47,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:45:47,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12361207] [2021-07-13 19:45:47,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:45:47,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:47,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:45:47,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:47,983 INFO L87 Difference]: Start difference. First operand 86 states and 179 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:48,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:48,206 INFO L93 Difference]: Finished difference Result 110 states and 215 transitions. [2021-07-13 19:45:48,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:45:48,207 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:48,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:48,207 INFO L225 Difference]: With dead ends: 110 [2021-07-13 19:45:48,207 INFO L226 Difference]: Without dead ends: 110 [2021-07-13 19:45:48,207 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 308.0ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:45:48,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-07-13 19:45:48,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 86. [2021-07-13 19:45:48,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1058823529411765) internal successors, (179), 85 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:48,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 179 transitions. [2021-07-13 19:45:48,208 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 179 transitions. Word has length 17 [2021-07-13 19:45:48,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:48,208 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 179 transitions. [2021-07-13 19:45:48,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:48,209 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 179 transitions. [2021-07-13 19:45:48,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:48,209 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:48,209 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:48,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4379,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:48,409 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:48,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:48,410 INFO L82 PathProgramCache]: Analyzing trace with hash 64956658, now seen corresponding path program 234 times [2021-07-13 19:45:48,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:48,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708424844] [2021-07-13 19:45:48,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:48,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:48,523 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:48,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:48,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708424844] [2021-07-13 19:45:48,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708424844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:48,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085875932] [2021-07-13 19:45:48,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:48,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:45:48,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:48,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:48,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:48,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:45:48,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:48,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:48,709 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:48,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:48,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:48,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:48,713 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:48,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:48,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:48,717 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:48,769 INFO L628 ElimStorePlain]: treesize reduction 36, result has 63.3 percent of original size [2021-07-13 19:45:48,769 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:48,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:45:48,770 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:127, output treesize:38 [2021-07-13 19:45:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:48,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085875932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:48,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:48,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:45:48,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359443263] [2021-07-13 19:45:48,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:45:48,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:48,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:45:48,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:48,845 INFO L87 Difference]: Start difference. First operand 86 states and 179 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:49,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:49,044 INFO L93 Difference]: Finished difference Result 109 states and 212 transitions. [2021-07-13 19:45:49,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:45:49,045 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:49,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:49,045 INFO L225 Difference]: With dead ends: 109 [2021-07-13 19:45:49,045 INFO L226 Difference]: Without dead ends: 107 [2021-07-13 19:45:49,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 298.6ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:45:49,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-07-13 19:45:49,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2021-07-13 19:45:49,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0952380952380953) internal successors, (176), 84 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:49,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 176 transitions. [2021-07-13 19:45:49,047 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 176 transitions. Word has length 17 [2021-07-13 19:45:49,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:49,047 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 176 transitions. [2021-07-13 19:45:49,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:49,047 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 176 transitions. [2021-07-13 19:45:49,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:49,048 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:49,048 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:49,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4389,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:49,261 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:49,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:49,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1512524101, now seen corresponding path program 235 times [2021-07-13 19:45:49,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:49,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994579900] [2021-07-13 19:45:49,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:49,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:49,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:49,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:49,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994579900] [2021-07-13 19:45:49,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994579900] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:49,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385482488] [2021-07-13 19:45:49,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:49,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:49,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:49,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:49,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:49,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385482488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:49,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:49,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:49,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941997041] [2021-07-13 19:45:49,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:49,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:49,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:49,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:49,506 INFO L87 Difference]: Start difference. First operand 85 states and 176 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:49,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:49,636 INFO L93 Difference]: Finished difference Result 102 states and 206 transitions. [2021-07-13 19:45:49,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:49,637 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:49,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:49,638 INFO L225 Difference]: With dead ends: 102 [2021-07-13 19:45:49,638 INFO L226 Difference]: Without dead ends: 102 [2021-07-13 19:45:49,638 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 192.4ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:49,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-07-13 19:45:49,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 85. [2021-07-13 19:45:49,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0952380952380953) internal successors, (176), 84 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:49,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 176 transitions. [2021-07-13 19:45:49,640 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 176 transitions. Word has length 17 [2021-07-13 19:45:49,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:49,640 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 176 transitions. [2021-07-13 19:45:49,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:49,640 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 176 transitions. [2021-07-13 19:45:49,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:49,640 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:49,640 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:49,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4411,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:49,848 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:49,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:49,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1140667814, now seen corresponding path program 236 times [2021-07-13 19:45:49,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:49,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610268672] [2021-07-13 19:45:49,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:49,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:49,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:49,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:49,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610268672] [2021-07-13 19:45:49,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610268672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:49,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635635330] [2021-07-13 19:45:49,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:49,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:49,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:49,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:49,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:50,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:50,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635635330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:50,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:50,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:50,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241256638] [2021-07-13 19:45:50,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:50,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:50,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:50,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:50,128 INFO L87 Difference]: Start difference. First operand 85 states and 176 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:50,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:50,255 INFO L93 Difference]: Finished difference Result 93 states and 186 transitions. [2021-07-13 19:45:50,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:45:50,256 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:50,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:50,256 INFO L225 Difference]: With dead ends: 93 [2021-07-13 19:45:50,256 INFO L226 Difference]: Without dead ends: 89 [2021-07-13 19:45:50,256 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 230.9ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:45:50,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-07-13 19:45:50,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2021-07-13 19:45:50,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:50,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 173 transitions. [2021-07-13 19:45:50,257 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 173 transitions. Word has length 17 [2021-07-13 19:45:50,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:50,257 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 173 transitions. [2021-07-13 19:45:50,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:50,257 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 173 transitions. [2021-07-13 19:45:50,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:50,258 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:50,258 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:50,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4414 [2021-07-13 19:45:50,458 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:50,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:50,458 INFO L82 PathProgramCache]: Analyzing trace with hash 2100269423, now seen corresponding path program 237 times [2021-07-13 19:45:50,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:50,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401663429] [2021-07-13 19:45:50,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:50,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:50,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:50,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:50,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401663429] [2021-07-13 19:45:50,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401663429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:50,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427198405] [2021-07-13 19:45:50,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:50,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:45:50,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:50,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:50,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:50,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:50,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427198405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:50,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:50,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:45:50,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718780460] [2021-07-13 19:45:50,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:45:50,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:50,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:45:50,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:45:50,671 INFO L87 Difference]: Start difference. First operand 84 states and 173 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:50,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:50,775 INFO L93 Difference]: Finished difference Result 95 states and 191 transitions. [2021-07-13 19:45:50,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:50,775 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:50,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:50,775 INFO L225 Difference]: With dead ends: 95 [2021-07-13 19:45:50,775 INFO L226 Difference]: Without dead ends: 95 [2021-07-13 19:45:50,775 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 169.1ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:50,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-07-13 19:45:50,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 78. [2021-07-13 19:45:50,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.051948051948052) internal successors, (158), 77 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:50,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 158 transitions. [2021-07-13 19:45:50,776 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 158 transitions. Word has length 17 [2021-07-13 19:45:50,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:50,776 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 158 transitions. [2021-07-13 19:45:50,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:50,777 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 158 transitions. [2021-07-13 19:45:50,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:50,777 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:50,777 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:50,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4420 [2021-07-13 19:45:50,977 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:50,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:50,978 INFO L82 PathProgramCache]: Analyzing trace with hash 127975282, now seen corresponding path program 238 times [2021-07-13 19:45:50,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:50,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793912169] [2021-07-13 19:45:50,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:51,079 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:51,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:51,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793912169] [2021-07-13 19:45:51,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793912169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:51,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486331795] [2021-07-13 19:45:51,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:51,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:51,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:51,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:51,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:51,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:51,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486331795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:51,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:51,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:45:51,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950668690] [2021-07-13 19:45:51,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:45:51,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:51,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:45:51,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:45:51,224 INFO L87 Difference]: Start difference. First operand 78 states and 158 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:51,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:51,360 INFO L93 Difference]: Finished difference Result 84 states and 165 transitions. [2021-07-13 19:45:51,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:45:51,360 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:51,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:51,360 INFO L225 Difference]: With dead ends: 84 [2021-07-13 19:45:51,360 INFO L226 Difference]: Without dead ends: 78 [2021-07-13 19:45:51,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 204.9ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:51,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-07-13 19:45:51,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2021-07-13 19:45:51,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 74 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:51,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 151 transitions. [2021-07-13 19:45:51,361 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 151 transitions. Word has length 17 [2021-07-13 19:45:51,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:51,362 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 151 transitions. [2021-07-13 19:45:51,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:51,362 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 151 transitions. [2021-07-13 19:45:51,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:51,362 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:51,362 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:51,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4423,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:51,577 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:51,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:51,577 INFO L82 PathProgramCache]: Analyzing trace with hash -336533025, now seen corresponding path program 239 times [2021-07-13 19:45:51,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:51,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429038601] [2021-07-13 19:45:51,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:51,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:51,693 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:51,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:51,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429038601] [2021-07-13 19:45:51,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429038601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:51,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312321500] [2021-07-13 19:45:51,693 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:51,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:45:51,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:51,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:51,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:51,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-13 19:45:51,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:51,811 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:45:51,812 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:51,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:51,815 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:51,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:51,818 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:51,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:45:51,821 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:51,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 19:45:51,824 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:51,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:51,849 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:51,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:45:51,851 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-07-13 19:45:51,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:51,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312321500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:51,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:51,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:45:51,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773842191] [2021-07-13 19:45:51,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:45:51,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:51,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:45:51,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:45:51,888 INFO L87 Difference]: Start difference. First operand 75 states and 151 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:51,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:51,985 INFO L93 Difference]: Finished difference Result 85 states and 166 transitions. [2021-07-13 19:45:51,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:45:51,986 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:51,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:51,986 INFO L225 Difference]: With dead ends: 85 [2021-07-13 19:45:51,986 INFO L226 Difference]: Without dead ends: 79 [2021-07-13 19:45:51,986 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 207.1ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:51,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-07-13 19:45:51,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2021-07-13 19:45:51,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.027027027027027) internal successors, (150), 74 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:51,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 150 transitions. [2021-07-13 19:45:51,987 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 150 transitions. Word has length 17 [2021-07-13 19:45:51,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:51,987 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 150 transitions. [2021-07-13 19:45:51,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:51,987 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 150 transitions. [2021-07-13 19:45:51,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:51,988 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:51,988 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:52,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4429 [2021-07-13 19:45:52,188 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:52,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:52,189 INFO L82 PathProgramCache]: Analyzing trace with hash 405588352, now seen corresponding path program 240 times [2021-07-13 19:45:52,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:52,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402211061] [2021-07-13 19:45:52,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:52,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:52,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:52,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:52,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402211061] [2021-07-13 19:45:52,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402211061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:52,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122510522] [2021-07-13 19:45:52,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:52,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:45:52,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:52,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:52,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:52,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-13 19:45:52,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:52,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-13 19:45:52,388 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:52,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:52,395 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:52,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:45:52,396 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-07-13 19:45:52,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:52,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122510522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:52,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:52,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:45:52,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233301400] [2021-07-13 19:45:52,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:45:52,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:52,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:45:52,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:45:52,419 INFO L87 Difference]: Start difference. First operand 75 states and 150 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:52,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:52,497 INFO L93 Difference]: Finished difference Result 83 states and 166 transitions. [2021-07-13 19:45:52,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:52,497 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:52,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:52,497 INFO L225 Difference]: With dead ends: 83 [2021-07-13 19:45:52,497 INFO L226 Difference]: Without dead ends: 83 [2021-07-13 19:45:52,498 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 166.1ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:52,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-07-13 19:45:52,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 75. [2021-07-13 19:45:52,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.027027027027027) internal successors, (150), 74 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:52,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 150 transitions. [2021-07-13 19:45:52,499 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 150 transitions. Word has length 17 [2021-07-13 19:45:52,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:52,499 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 150 transitions. [2021-07-13 19:45:52,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:52,499 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 150 transitions. [2021-07-13 19:45:52,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:52,499 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:52,499 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:52,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4438,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:52,713 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:52,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:52,713 INFO L82 PathProgramCache]: Analyzing trace with hash -576979173, now seen corresponding path program 241 times [2021-07-13 19:45:52,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:52,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647688294] [2021-07-13 19:45:52,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:52,811 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:52,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:52,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647688294] [2021-07-13 19:45:52,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647688294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:52,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118752286] [2021-07-13 19:45:52,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:52,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:52,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:52,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:52,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:52,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:52,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:52,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:52,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:52,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:52,928 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:52,960 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:45:52,961 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:52,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:52,961 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:45:53,002 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:53,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118752286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:53,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:53,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:53,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395521808] [2021-07-13 19:45:53,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:53,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:53,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:53,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:53,003 INFO L87 Difference]: Start difference. First operand 75 states and 150 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:53,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:53,195 INFO L93 Difference]: Finished difference Result 106 states and 204 transitions. [2021-07-13 19:45:53,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:45:53,196 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:53,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:53,196 INFO L225 Difference]: With dead ends: 106 [2021-07-13 19:45:53,196 INFO L226 Difference]: Without dead ends: 103 [2021-07-13 19:45:53,196 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 242.1ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:45:53,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-07-13 19:45:53,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2021-07-13 19:45:53,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.050632911392405) internal successors, (162), 79 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:53,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2021-07-13 19:45:53,197 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 17 [2021-07-13 19:45:53,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:53,197 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2021-07-13 19:45:53,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:53,198 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2021-07-13 19:45:53,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:53,198 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:53,198 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:53,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4441 [2021-07-13 19:45:53,420 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:53,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:53,421 INFO L82 PathProgramCache]: Analyzing trace with hash -830134438, now seen corresponding path program 242 times [2021-07-13 19:45:53,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:53,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249997156] [2021-07-13 19:45:53,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:53,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:53,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:53,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:53,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249997156] [2021-07-13 19:45:53,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249997156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:53,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489927000] [2021-07-13 19:45:53,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:53,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:53,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:53,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:53,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:53,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:45:53,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:53,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:53,610 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:53,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:53,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:53,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:53,614 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:53,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:53,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:53,617 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:53,651 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-07-13 19:45:53,651 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:53,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:53,652 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:45:53,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:53,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489927000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:53,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:53,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:53,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773287800] [2021-07-13 19:45:53,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:53,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:53,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:53,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:53,689 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:53,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:53,780 INFO L93 Difference]: Finished difference Result 109 states and 212 transitions. [2021-07-13 19:45:53,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:53,781 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:53,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:53,781 INFO L225 Difference]: With dead ends: 109 [2021-07-13 19:45:53,781 INFO L226 Difference]: Without dead ends: 109 [2021-07-13 19:45:53,781 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 150.0ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:53,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-07-13 19:45:53,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 80. [2021-07-13 19:45:53,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.050632911392405) internal successors, (162), 79 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:53,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2021-07-13 19:45:53,782 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 17 [2021-07-13 19:45:53,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:53,782 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2021-07-13 19:45:53,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:53,782 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2021-07-13 19:45:53,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:53,783 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:53,783 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:53,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4459,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:53,983 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:53,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:53,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1277472161, now seen corresponding path program 243 times [2021-07-13 19:45:53,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:53,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702089068] [2021-07-13 19:45:53,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:53,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:54,090 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:54,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:54,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702089068] [2021-07-13 19:45:54,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702089068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:54,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418264912] [2021-07-13 19:45:54,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:54,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:45:54,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:54,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:54,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:54,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:54,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:54,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:54,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:54,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:54,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:54,211 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:54,239 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:45:54,239 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:54,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:54,240 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:45:54,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:54,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418264912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:54,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:54,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:54,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491256746] [2021-07-13 19:45:54,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:54,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:54,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:54,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:54,274 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:54,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:54,455 INFO L93 Difference]: Finished difference Result 93 states and 186 transitions. [2021-07-13 19:45:54,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:45:54,455 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:54,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:54,455 INFO L225 Difference]: With dead ends: 93 [2021-07-13 19:45:54,455 INFO L226 Difference]: Without dead ends: 93 [2021-07-13 19:45:54,455 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 246.9ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:45:54,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-07-13 19:45:54,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2021-07-13 19:45:54,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.04) internal successors, (153), 75 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:54,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 153 transitions. [2021-07-13 19:45:54,457 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 153 transitions. Word has length 17 [2021-07-13 19:45:54,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:54,457 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 153 transitions. [2021-07-13 19:45:54,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:54,457 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 153 transitions. [2021-07-13 19:45:54,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:54,457 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:54,457 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:54,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4468,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:54,658 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:54,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:54,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1034697890, now seen corresponding path program 244 times [2021-07-13 19:45:54,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:54,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804490047] [2021-07-13 19:45:54,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:54,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:54,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:54,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:54,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804490047] [2021-07-13 19:45:54,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804490047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:54,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285318874] [2021-07-13 19:45:54,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:54,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:54,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:54,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:54,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:54,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:54,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:54,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:54,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:54,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:54,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:54,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:54,856 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:54,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:45:54,863 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:54,865 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:45:54,865 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:54,897 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-07-13 19:45:54,898 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:54,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:54,898 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:45:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:54,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285318874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:54,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:54,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:54,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127292052] [2021-07-13 19:45:54,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:54,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:54,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:54,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:54,956 INFO L87 Difference]: Start difference. First operand 76 states and 153 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:55,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:55,110 INFO L93 Difference]: Finished difference Result 86 states and 170 transitions. [2021-07-13 19:45:55,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:45:55,110 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:55,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:55,111 INFO L225 Difference]: With dead ends: 86 [2021-07-13 19:45:55,111 INFO L226 Difference]: Without dead ends: 84 [2021-07-13 19:45:55,111 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 231.6ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:45:55,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-07-13 19:45:55,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2021-07-13 19:45:55,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 73 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:55,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 148 transitions. [2021-07-13 19:45:55,112 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 148 transitions. Word has length 17 [2021-07-13 19:45:55,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:55,112 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 148 transitions. [2021-07-13 19:45:55,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:55,112 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 148 transitions. [2021-07-13 19:45:55,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:55,112 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:55,112 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:55,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4484 [2021-07-13 19:45:55,313 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:55,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:55,313 INFO L82 PathProgramCache]: Analyzing trace with hash 10766149, now seen corresponding path program 245 times [2021-07-13 19:45:55,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:55,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897383963] [2021-07-13 19:45:55,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:55,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:55,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:55,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:55,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897383963] [2021-07-13 19:45:55,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897383963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:55,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535067472] [2021-07-13 19:45:55,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:55,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:45:55,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:55,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:55,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:55,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:55,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:55,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:55,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:55,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:55,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:55,521 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:55,547 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:45:55,547 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:55,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:55,547 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:45:55,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:55,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535067472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:55,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:55,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:55,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887223981] [2021-07-13 19:45:55,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:55,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:55,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:55,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:55,589 INFO L87 Difference]: Start difference. First operand 74 states and 148 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:55,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:55,818 INFO L93 Difference]: Finished difference Result 111 states and 214 transitions. [2021-07-13 19:45:55,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:45:55,818 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:55,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:55,818 INFO L225 Difference]: With dead ends: 111 [2021-07-13 19:45:55,818 INFO L226 Difference]: Without dead ends: 108 [2021-07-13 19:45:55,818 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 245.1ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:45:55,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-07-13 19:45:55,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2021-07-13 19:45:55,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.075) internal successors, (166), 80 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:55,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 166 transitions. [2021-07-13 19:45:55,820 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 166 transitions. Word has length 17 [2021-07-13 19:45:55,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:55,820 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 166 transitions. [2021-07-13 19:45:55,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:55,820 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 166 transitions. [2021-07-13 19:45:55,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:55,820 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:55,820 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:56,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4496 [2021-07-13 19:45:56,020 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:56,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:56,021 INFO L82 PathProgramCache]: Analyzing trace with hash -242389116, now seen corresponding path program 246 times [2021-07-13 19:45:56,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:56,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494199187] [2021-07-13 19:45:56,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:56,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:56,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:56,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:56,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494199187] [2021-07-13 19:45:56,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494199187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:56,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401976168] [2021-07-13 19:45:56,114 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:56,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:45:56,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:56,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:56,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:56,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:56,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:56,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:56,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:56,251 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:56,292 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-07-13 19:45:56,292 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:56,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:45:56,295 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:56,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:56,309 INFO L518 ElimStorePlain]: Eliminatee v_prenex_154 vanished before elimination [2021-07-13 19:45:56,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:56,310 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:45:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:56,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401976168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:56,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:56,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:56,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131194536] [2021-07-13 19:45:56,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:56,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:56,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:56,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:56,356 INFO L87 Difference]: Start difference. First operand 81 states and 166 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:56,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:56,441 INFO L93 Difference]: Finished difference Result 100 states and 195 transitions. [2021-07-13 19:45:56,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:56,442 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:56,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:56,442 INFO L225 Difference]: With dead ends: 100 [2021-07-13 19:45:56,442 INFO L226 Difference]: Without dead ends: 100 [2021-07-13 19:45:56,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 164.4ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:56,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-07-13 19:45:56,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2021-07-13 19:45:56,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.075) internal successors, (166), 80 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:56,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 166 transitions. [2021-07-13 19:45:56,443 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 166 transitions. Word has length 17 [2021-07-13 19:45:56,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:56,443 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 166 transitions. [2021-07-13 19:45:56,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:56,444 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 166 transitions. [2021-07-13 19:45:56,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:56,444 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:56,444 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:56,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4506 [2021-07-13 19:45:56,644 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:56,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:56,645 INFO L82 PathProgramCache]: Analyzing trace with hash -689726839, now seen corresponding path program 247 times [2021-07-13 19:45:56,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:56,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368749211] [2021-07-13 19:45:56,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:56,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:56,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:56,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:56,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368749211] [2021-07-13 19:45:56,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368749211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:56,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545791366] [2021-07-13 19:45:56,740 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:56,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:56,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:56,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:56,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:56,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:56,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:56,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:56,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:56,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:56,845 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:56,870 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:45:56,870 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:56,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:56,871 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:45:56,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:56,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545791366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:56,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:56,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:56,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251623207] [2021-07-13 19:45:56,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:56,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:56,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:56,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:56,906 INFO L87 Difference]: Start difference. First operand 81 states and 166 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:57,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:57,090 INFO L93 Difference]: Finished difference Result 113 states and 220 transitions. [2021-07-13 19:45:57,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:45:57,090 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:57,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:57,091 INFO L225 Difference]: With dead ends: 113 [2021-07-13 19:45:57,091 INFO L226 Difference]: Without dead ends: 113 [2021-07-13 19:45:57,091 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 221.3ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:45:57,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-07-13 19:45:57,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 81. [2021-07-13 19:45:57,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.075) internal successors, (166), 80 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:57,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 166 transitions. [2021-07-13 19:45:57,092 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 166 transitions. Word has length 17 [2021-07-13 19:45:57,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:57,093 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 166 transitions. [2021-07-13 19:45:57,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:57,093 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 166 transitions. [2021-07-13 19:45:57,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:57,093 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:57,093 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:57,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4523,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:57,315 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:57,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:57,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1622443212, now seen corresponding path program 248 times [2021-07-13 19:45:57,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:57,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278658878] [2021-07-13 19:45:57,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:57,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:57,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:57,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:57,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278658878] [2021-07-13 19:45:57,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278658878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:57,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443505880] [2021-07-13 19:45:57,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:57,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:57,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:57,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:57,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:57,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:57,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:57,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:57,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:57,568 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:45:57,569 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:57,607 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-07-13 19:45:57,607 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:57,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:45:57,610 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:57,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:57,624 INFO L518 ElimStorePlain]: Eliminatee v_prenex_157 vanished before elimination [2021-07-13 19:45:57,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:57,625 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:45:57,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:57,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443505880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:57,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:57,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:45:57,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048053311] [2021-07-13 19:45:57,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:45:57,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:57,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:45:57,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:57,693 INFO L87 Difference]: Start difference. First operand 81 states and 166 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:57,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:57,855 INFO L93 Difference]: Finished difference Result 102 states and 196 transitions. [2021-07-13 19:45:57,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:45:57,856 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:57,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:57,856 INFO L225 Difference]: With dead ends: 102 [2021-07-13 19:45:57,856 INFO L226 Difference]: Without dead ends: 100 [2021-07-13 19:45:57,856 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 233.6ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:45:57,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-07-13 19:45:57,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 80. [2021-07-13 19:45:57,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 79 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:57,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 163 transitions. [2021-07-13 19:45:57,858 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 163 transitions. Word has length 17 [2021-07-13 19:45:57,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:57,858 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 163 transitions. [2021-07-13 19:45:57,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:57,858 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 163 transitions. [2021-07-13 19:45:57,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:57,858 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:57,858 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:58,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4531,252 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:58,073 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:58,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:58,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1224956641, now seen corresponding path program 249 times [2021-07-13 19:45:58,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:58,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297785537] [2021-07-13 19:45:58,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:58,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:58,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:58,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:58,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297785537] [2021-07-13 19:45:58,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297785537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:58,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373322928] [2021-07-13 19:45:58,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:58,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:45:58,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:58,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:58,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:58,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:58,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373322928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:58,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:58,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:45:58,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053137368] [2021-07-13 19:45:58,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:45:58,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:58,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:45:58,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:45:58,292 INFO L87 Difference]: Start difference. First operand 80 states and 163 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:58,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:58,379 INFO L93 Difference]: Finished difference Result 86 states and 172 transitions. [2021-07-13 19:45:58,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:58,379 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:58,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:58,379 INFO L225 Difference]: With dead ends: 86 [2021-07-13 19:45:58,379 INFO L226 Difference]: Without dead ends: 86 [2021-07-13 19:45:58,379 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 169.3ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:45:58,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-07-13 19:45:58,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2021-07-13 19:45:58,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 74 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:58,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 151 transitions. [2021-07-13 19:45:58,380 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 151 transitions. Word has length 17 [2021-07-13 19:45:58,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:58,381 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 151 transitions. [2021-07-13 19:45:58,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:58,381 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 151 transitions. [2021-07-13 19:45:58,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:58,381 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:58,381 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:58,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4551 [2021-07-13 19:45:58,581 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:58,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:58,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1596812928, now seen corresponding path program 250 times [2021-07-13 19:45:58,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:58,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588450418] [2021-07-13 19:45:58,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:58,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:58,691 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:58,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:58,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588450418] [2021-07-13 19:45:58,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588450418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:58,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993778428] [2021-07-13 19:45:58,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:58,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:58,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:58,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:58,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:58,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:58,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993778428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:58,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:58,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:45:58,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68219178] [2021-07-13 19:45:58,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:45:58,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:58,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:45:58,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:45:58,825 INFO L87 Difference]: Start difference. First operand 75 states and 151 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:58,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:58,950 INFO L93 Difference]: Finished difference Result 79 states and 155 transitions. [2021-07-13 19:45:58,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:45:58,950 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:58,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:58,950 INFO L225 Difference]: With dead ends: 79 [2021-07-13 19:45:58,950 INFO L226 Difference]: Without dead ends: 75 [2021-07-13 19:45:58,951 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 210.6ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:45:58,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-07-13 19:45:58,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2021-07-13 19:45:58,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0277777777777777) internal successors, (146), 72 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:58,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 146 transitions. [2021-07-13 19:45:58,951 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 146 transitions. Word has length 17 [2021-07-13 19:45:58,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:58,952 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 146 transitions. [2021-07-13 19:45:58,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:58,952 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 146 transitions. [2021-07-13 19:45:58,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:58,952 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:58,952 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:59,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4554,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:59,152 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:59,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:59,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1051001947, now seen corresponding path program 251 times [2021-07-13 19:45:59,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:59,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301953146] [2021-07-13 19:45:59,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:59,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:59,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:59,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:59,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301953146] [2021-07-13 19:45:59,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301953146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:59,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162429384] [2021-07-13 19:45:59,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:59,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:45:59,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:59,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:45:59,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:59,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:59,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:59,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:45:59,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:59,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:45:59,387 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:59,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:45:59,391 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:59,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:59,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:45:59,394 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:59,435 INFO L628 ElimStorePlain]: treesize reduction 58, result has 42.0 percent of original size [2021-07-13 19:45:59,436 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:45:59,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:45:59,437 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:129, output treesize:18 [2021-07-13 19:45:59,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:59,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162429384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:59,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:59,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:45:59,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036041050] [2021-07-13 19:45:59,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:45:59,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:59,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:45:59,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:45:59,486 INFO L87 Difference]: Start difference. First operand 73 states and 146 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:59,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:59,810 INFO L93 Difference]: Finished difference Result 112 states and 215 transitions. [2021-07-13 19:45:59,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:45:59,810 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:45:59,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:59,810 INFO L225 Difference]: With dead ends: 112 [2021-07-13 19:45:59,811 INFO L226 Difference]: Without dead ends: 109 [2021-07-13 19:45:59,811 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 368.8ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:45:59,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-07-13 19:45:59,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 82. [2021-07-13 19:45:59,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:59,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 170 transitions. [2021-07-13 19:45:59,812 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 170 transitions. Word has length 17 [2021-07-13 19:45:59,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:59,812 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 170 transitions. [2021-07-13 19:45:59,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:59,812 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 170 transitions. [2021-07-13 19:45:59,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:45:59,812 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:59,812 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:00,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4560 [2021-07-13 19:46:00,013 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:00,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:00,013 INFO L82 PathProgramCache]: Analyzing trace with hash 797846682, now seen corresponding path program 252 times [2021-07-13 19:46:00,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:00,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570033265] [2021-07-13 19:46:00,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:00,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:00,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:00,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:00,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570033265] [2021-07-13 19:46:00,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570033265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:00,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647079763] [2021-07-13 19:46:00,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:00,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:46:00,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:00,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:46:00,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:00,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:46:00,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:00,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:46:00,314 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:00,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:00,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:00,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:46:00,318 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:00,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:00,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:46:00,322 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:00,397 INFO L628 ElimStorePlain]: treesize reduction 36, result has 63.3 percent of original size [2021-07-13 19:46:00,397 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:46:00,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:46:00,399 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:127, output treesize:38 [2021-07-13 19:46:00,462 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:00,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647079763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:00,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:00,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:46:00,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572980044] [2021-07-13 19:46:00,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:46:00,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:00,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:46:00,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:46:00,464 INFO L87 Difference]: Start difference. First operand 82 states and 170 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:00,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:00,606 INFO L93 Difference]: Finished difference Result 103 states and 202 transitions. [2021-07-13 19:46:00,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:46:00,606 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:46:00,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:00,606 INFO L225 Difference]: With dead ends: 103 [2021-07-13 19:46:00,606 INFO L226 Difference]: Without dead ends: 103 [2021-07-13 19:46:00,607 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 214.4ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:46:00,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-07-13 19:46:00,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2021-07-13 19:46:00,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:00,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 170 transitions. [2021-07-13 19:46:00,608 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 170 transitions. Word has length 17 [2021-07-13 19:46:00,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:00,608 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 170 transitions. [2021-07-13 19:46:00,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:00,608 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 170 transitions. [2021-07-13 19:46:00,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:46:00,609 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:00,609 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:00,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4572,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:00,809 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:00,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:00,809 INFO L82 PathProgramCache]: Analyzing trace with hash 350508959, now seen corresponding path program 253 times [2021-07-13 19:46:00,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:00,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320715412] [2021-07-13 19:46:00,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:00,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:00,897 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:00,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:00,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320715412] [2021-07-13 19:46:00,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320715412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:00,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318841709] [2021-07-13 19:46:00,897 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:00,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:00,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:46:00,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:01,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:01,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:01,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:46:01,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:01,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:46:01,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:01,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:01,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:01,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:46:01,056 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:01,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:46:01,059 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:01,100 INFO L628 ElimStorePlain]: treesize reduction 58, result has 42.0 percent of original size [2021-07-13 19:46:01,100 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:46:01,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:46:01,101 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:129, output treesize:18 [2021-07-13 19:46:01,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:01,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318841709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:01,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:01,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:46:01,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709433174] [2021-07-13 19:46:01,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:46:01,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:01,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:46:01,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:46:01,139 INFO L87 Difference]: Start difference. First operand 82 states and 170 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:01,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:01,453 INFO L93 Difference]: Finished difference Result 112 states and 218 transitions. [2021-07-13 19:46:01,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:46:01,453 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:46:01,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:01,454 INFO L225 Difference]: With dead ends: 112 [2021-07-13 19:46:01,454 INFO L226 Difference]: Without dead ends: 112 [2021-07-13 19:46:01,454 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 344.7ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:46:01,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-07-13 19:46:01,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 82. [2021-07-13 19:46:01,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:01,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 170 transitions. [2021-07-13 19:46:01,455 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 170 transitions. Word has length 17 [2021-07-13 19:46:01,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:01,455 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 170 transitions. [2021-07-13 19:46:01,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:01,455 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 170 transitions. [2021-07-13 19:46:01,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:46:01,455 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:01,455 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:01,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4582 [2021-07-13 19:46:01,657 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:01,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:01,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1632288286, now seen corresponding path program 254 times [2021-07-13 19:46:01,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:01,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874844801] [2021-07-13 19:46:01,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:01,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:01,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:01,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:01,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874844801] [2021-07-13 19:46:01,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874844801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:01,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920870962] [2021-07-13 19:46:01,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:01,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:46:01,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:01,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:46:01,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:01,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:01,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:01,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:46:01,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:01,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:01,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:01,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:46:01,931 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:01,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:46:01,934 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:01,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:46:01,938 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:01,990 INFO L628 ElimStorePlain]: treesize reduction 36, result has 63.3 percent of original size [2021-07-13 19:46:01,990 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:46:01,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:46:01,992 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:127, output treesize:38 [2021-07-13 19:46:02,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:02,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920870962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:02,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:02,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:46:02,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130945651] [2021-07-13 19:46:02,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:46:02,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:02,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:46:02,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:46:02,066 INFO L87 Difference]: Start difference. First operand 82 states and 170 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:02,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:02,295 INFO L93 Difference]: Finished difference Result 105 states and 203 transitions. [2021-07-13 19:46:02,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:46:02,296 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:46:02,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:02,296 INFO L225 Difference]: With dead ends: 105 [2021-07-13 19:46:02,296 INFO L226 Difference]: Without dead ends: 103 [2021-07-13 19:46:02,296 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 286.6ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:46:02,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-07-13 19:46:02,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 81. [2021-07-13 19:46:02,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.0875) internal successors, (167), 80 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:02,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 167 transitions. [2021-07-13 19:46:02,297 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 167 transitions. Word has length 17 [2021-07-13 19:46:02,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:02,297 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 167 transitions. [2021-07-13 19:46:02,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:02,297 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 167 transitions. [2021-07-13 19:46:02,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:46:02,298 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:02,298 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:02,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4592 [2021-07-13 19:46:02,498 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:02,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:02,498 INFO L82 PathProgramCache]: Analyzing trace with hash -184720843, now seen corresponding path program 255 times [2021-07-13 19:46:02,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:02,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124819827] [2021-07-13 19:46:02,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:02,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:02,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:02,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124819827] [2021-07-13 19:46:02,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124819827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:02,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692179482] [2021-07-13 19:46:02,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:02,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:46:02,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:02,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:46:02,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:02,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:02,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692179482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:02,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:02,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:46:02,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101646712] [2021-07-13 19:46:02,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:46:02,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:02,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:46:02,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:46:02,738 INFO L87 Difference]: Start difference. First operand 81 states and 167 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:02,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:02,844 INFO L93 Difference]: Finished difference Result 98 states and 197 transitions. [2021-07-13 19:46:02,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:46:02,845 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:46:02,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:02,845 INFO L225 Difference]: With dead ends: 98 [2021-07-13 19:46:02,845 INFO L226 Difference]: Without dead ends: 98 [2021-07-13 19:46:02,845 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 196.2ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:46:02,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-07-13 19:46:02,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 81. [2021-07-13 19:46:02,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.0875) internal successors, (167), 80 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:02,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 167 transitions. [2021-07-13 19:46:02,847 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 167 transitions. Word has length 17 [2021-07-13 19:46:02,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:02,847 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 167 transitions. [2021-07-13 19:46:02,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:02,847 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 167 transitions. [2021-07-13 19:46:02,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:46:02,847 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:02,847 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:03,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4614 [2021-07-13 19:46:03,055 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:03,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:03,056 INFO L82 PathProgramCache]: Analyzing trace with hash -556577130, now seen corresponding path program 256 times [2021-07-13 19:46:03,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:03,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135199875] [2021-07-13 19:46:03,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:03,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:03,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135199875] [2021-07-13 19:46:03,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135199875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:03,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153046493] [2021-07-13 19:46:03,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:03,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:46:03,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:03,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:46:03,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:03,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:46:03,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:03,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:03,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:03,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:46:03,479 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:03,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:46:03,483 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:03,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:03,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:03,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:46:03,487 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:03,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:03,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:03,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:46:03,499 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:03,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:46:03,502 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:03,575 INFO L628 ElimStorePlain]: treesize reduction 37, result has 70.9 percent of original size [2021-07-13 19:46:03,575 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:46:03,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:46:03,577 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:170, output treesize:48 [2021-07-13 19:46:03,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:03,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153046493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:03,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:03,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:46:03,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228914806] [2021-07-13 19:46:03,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:46:03,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:03,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:46:03,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:46:03,619 INFO L87 Difference]: Start difference. First operand 81 states and 167 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:03,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:03,823 INFO L93 Difference]: Finished difference Result 89 states and 177 transitions. [2021-07-13 19:46:03,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:46:03,824 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:46:03,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:03,824 INFO L225 Difference]: With dead ends: 89 [2021-07-13 19:46:03,824 INFO L226 Difference]: Without dead ends: 85 [2021-07-13 19:46:03,824 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 321.3ms TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:46:03,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-07-13 19:46:03,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2021-07-13 19:46:03,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:03,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 164 transitions. [2021-07-13 19:46:03,825 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 164 transitions. Word has length 17 [2021-07-13 19:46:03,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:03,825 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 164 transitions. [2021-07-13 19:46:03,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:03,825 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 164 transitions. [2021-07-13 19:46:03,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:46:03,826 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:03,826 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:04,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4617,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:04,026 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:04,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:04,026 INFO L82 PathProgramCache]: Analyzing trace with hash 403024479, now seen corresponding path program 257 times [2021-07-13 19:46:04,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:04,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449696889] [2021-07-13 19:46:04,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:04,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:04,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:04,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:04,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449696889] [2021-07-13 19:46:04,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449696889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:04,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715779138] [2021-07-13 19:46:04,121 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:04,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:46:04,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:04,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:46:04,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:04,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:04,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715779138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:04,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:04,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:46:04,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728841922] [2021-07-13 19:46:04,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:46:04,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:04,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:46:04,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:46:04,238 INFO L87 Difference]: Start difference. First operand 80 states and 164 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:04,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:04,365 INFO L93 Difference]: Finished difference Result 91 states and 182 transitions. [2021-07-13 19:46:04,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:46:04,365 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:46:04,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:04,365 INFO L225 Difference]: With dead ends: 91 [2021-07-13 19:46:04,365 INFO L226 Difference]: Without dead ends: 91 [2021-07-13 19:46:04,365 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 162.6ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:46:04,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-07-13 19:46:04,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 74. [2021-07-13 19:46:04,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:04,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 149 transitions. [2021-07-13 19:46:04,366 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 149 transitions. Word has length 17 [2021-07-13 19:46:04,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:04,366 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 149 transitions. [2021-07-13 19:46:04,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:04,367 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 149 transitions. [2021-07-13 19:46:04,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:46:04,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:04,367 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:04,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4646 [2021-07-13 19:46:04,567 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:04,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:04,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1569269662, now seen corresponding path program 258 times [2021-07-13 19:46:04,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:04,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552575682] [2021-07-13 19:46:04,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:04,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:04,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:04,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:04,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552575682] [2021-07-13 19:46:04,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552575682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:04,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001735234] [2021-07-13 19:46:04,674 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:04,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:46:04,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:04,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:46:04,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:04,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:04,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001735234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:04,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:04,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:46:04,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67616834] [2021-07-13 19:46:04,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:46:04,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:04,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:46:04,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:46:04,815 INFO L87 Difference]: Start difference. First operand 74 states and 149 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:04,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:04,954 INFO L93 Difference]: Finished difference Result 80 states and 156 transitions. [2021-07-13 19:46:04,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:46:04,954 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:46:04,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:04,954 INFO L225 Difference]: With dead ends: 80 [2021-07-13 19:46:04,954 INFO L226 Difference]: Without dead ends: 74 [2021-07-13 19:46:04,955 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 209.1ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:46:04,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-07-13 19:46:04,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2021-07-13 19:46:04,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.028169014084507) internal successors, (144), 71 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:04,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 144 transitions. [2021-07-13 19:46:04,955 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 144 transitions. Word has length 17 [2021-07-13 19:46:04,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:04,956 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 144 transitions. [2021-07-13 19:46:04,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:04,956 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 144 transitions. [2021-07-13 19:46:04,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:46:04,956 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:04,956 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:05,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4649,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:05,156 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:05,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:05,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1966083435, now seen corresponding path program 259 times [2021-07-13 19:46:05,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:05,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245621599] [2021-07-13 19:46:05,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:05,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:05,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:05,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:05,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245621599] [2021-07-13 19:46:05,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245621599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:05,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533255476] [2021-07-13 19:46:05,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:05,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:05,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:46:05,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:05,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:05,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:05,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:46:05,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:05,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:05,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:46:05,406 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:05,431 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:46:05,431 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:46:05,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:46:05,432 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:46:05,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:05,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533255476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:05,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:05,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:46:05,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743126560] [2021-07-13 19:46:05,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:46:05,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:05,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:46:05,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:46:05,479 INFO L87 Difference]: Start difference. First operand 72 states and 144 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:05,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:05,863 INFO L93 Difference]: Finished difference Result 108 states and 203 transitions. [2021-07-13 19:46:05,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:46:05,863 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:46:05,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:05,864 INFO L225 Difference]: With dead ends: 108 [2021-07-13 19:46:05,864 INFO L226 Difference]: Without dead ends: 105 [2021-07-13 19:46:05,864 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 442.5ms TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:46:05,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-07-13 19:46:05,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 78. [2021-07-13 19:46:05,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.051948051948052) internal successors, (158), 77 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:05,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 158 transitions. [2021-07-13 19:46:05,865 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 158 transitions. Word has length 17 [2021-07-13 19:46:05,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:05,865 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 158 transitions. [2021-07-13 19:46:05,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:05,865 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 158 transitions. [2021-07-13 19:46:05,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:46:05,865 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:05,865 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:06,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4655,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:06,066 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:06,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:06,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1712928170, now seen corresponding path program 260 times [2021-07-13 19:46:06,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:06,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617284402] [2021-07-13 19:46:06,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:06,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:06,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:06,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:06,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617284402] [2021-07-13 19:46:06,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617284402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:06,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644618825] [2021-07-13 19:46:06,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:06,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:46:06,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:06,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:46:06,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:06,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:06,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:06,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:46:06,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:06,355 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:46:06,355 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:06,391 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-07-13 19:46:06,391 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:46:06,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:46:06,395 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:06,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:46:06,409 INFO L518 ElimStorePlain]: Eliminatee v_prenex_175 vanished before elimination [2021-07-13 19:46:06,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:46:06,410 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:46:06,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:06,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644618825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:06,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:06,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:46:06,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121697801] [2021-07-13 19:46:06,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:46:06,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:06,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:46:06,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:46:06,461 INFO L87 Difference]: Start difference. First operand 78 states and 158 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:06,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:06,787 INFO L93 Difference]: Finished difference Result 106 states and 204 transitions. [2021-07-13 19:46:06,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:46:06,788 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:46:06,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:06,788 INFO L225 Difference]: With dead ends: 106 [2021-07-13 19:46:06,788 INFO L226 Difference]: Without dead ends: 106 [2021-07-13 19:46:06,788 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 380.2ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:46:06,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-07-13 19:46:06,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 78. [2021-07-13 19:46:06,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.051948051948052) internal successors, (158), 77 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:06,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 158 transitions. [2021-07-13 19:46:06,789 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 158 transitions. Word has length 17 [2021-07-13 19:46:06,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:06,789 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 158 transitions. [2021-07-13 19:46:06,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:06,790 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 158 transitions. [2021-07-13 19:46:06,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:46:06,790 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:06,790 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:06,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4665 [2021-07-13 19:46:06,990 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:06,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:06,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1265590447, now seen corresponding path program 261 times [2021-07-13 19:46:06,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:06,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319618217] [2021-07-13 19:46:06,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:06,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:07,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:07,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:07,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319618217] [2021-07-13 19:46:07,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319618217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:07,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542988405] [2021-07-13 19:46:07,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:07,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:46:07,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:07,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:46:07,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:07,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:07,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:07,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:46:07,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:07,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:07,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:46:07,217 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:07,242 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:46:07,242 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:46:07,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:46:07,242 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:46:07,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:07,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542988405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:07,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:07,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:46:07,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951123649] [2021-07-13 19:46:07,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:46:07,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:07,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:46:07,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:46:07,280 INFO L87 Difference]: Start difference. First operand 78 states and 158 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:07,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:07,653 INFO L93 Difference]: Finished difference Result 112 states and 214 transitions. [2021-07-13 19:46:07,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:46:07,653 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:46:07,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:07,654 INFO L225 Difference]: With dead ends: 112 [2021-07-13 19:46:07,654 INFO L226 Difference]: Without dead ends: 112 [2021-07-13 19:46:07,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 387.4ms TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:46:07,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-07-13 19:46:07,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 78. [2021-07-13 19:46:07,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.051948051948052) internal successors, (158), 77 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:07,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 158 transitions. [2021-07-13 19:46:07,655 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 158 transitions. Word has length 17 [2021-07-13 19:46:07,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:07,655 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 158 transitions. [2021-07-13 19:46:07,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:07,655 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 158 transitions. [2021-07-13 19:46:07,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:46:07,655 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:07,655 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:07,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4676,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:07,856 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:07,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:07,856 INFO L82 PathProgramCache]: Analyzing trace with hash -717206798, now seen corresponding path program 262 times [2021-07-13 19:46:07,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:07,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484502044] [2021-07-13 19:46:07,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:07,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:07,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:07,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:07,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484502044] [2021-07-13 19:46:07,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484502044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:07,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561815898] [2021-07-13 19:46:07,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:07,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:46:07,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:07,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:46:07,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:08,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:46:08,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:08,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:08,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:46:08,119 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:08,158 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-07-13 19:46:08,159 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:46:08,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:46:08,161 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:08,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:46:08,175 INFO L518 ElimStorePlain]: Eliminatee v_prenex_178 vanished before elimination [2021-07-13 19:46:08,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:46:08,176 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:46:08,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:08,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561815898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:08,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:08,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:46:08,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446395856] [2021-07-13 19:46:08,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:46:08,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:08,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:46:08,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:46:08,246 INFO L87 Difference]: Start difference. First operand 78 states and 158 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:08,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:08,752 INFO L93 Difference]: Finished difference Result 108 states and 205 transitions. [2021-07-13 19:46:08,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:46:08,752 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:46:08,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:08,753 INFO L225 Difference]: With dead ends: 108 [2021-07-13 19:46:08,753 INFO L226 Difference]: Without dead ends: 106 [2021-07-13 19:46:08,753 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 543.1ms TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:46:08,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-07-13 19:46:08,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 77. [2021-07-13 19:46:08,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.039473684210526) internal successors, (155), 76 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:08,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 155 transitions. [2021-07-13 19:46:08,754 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 155 transitions. Word has length 17 [2021-07-13 19:46:08,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:08,754 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 155 transitions. [2021-07-13 19:46:08,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:08,754 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 155 transitions. [2021-07-13 19:46:08,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:46:08,754 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:08,754 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:08,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4684 [2021-07-13 19:46:08,955 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:08,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:08,955 INFO L82 PathProgramCache]: Analyzing trace with hash 730360645, now seen corresponding path program 263 times [2021-07-13 19:46:08,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:08,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268281548] [2021-07-13 19:46:08,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:08,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:09,051 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:09,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:09,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268281548] [2021-07-13 19:46:09,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268281548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:09,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876952426] [2021-07-13 19:46:09,051 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:09,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:46:09,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:09,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:46:09,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:09,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:09,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876952426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:09,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:09,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:46:09,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842978583] [2021-07-13 19:46:09,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:46:09,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:09,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:46:09,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:46:09,196 INFO L87 Difference]: Start difference. First operand 77 states and 155 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:09,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:09,345 INFO L93 Difference]: Finished difference Result 94 states and 185 transitions. [2021-07-13 19:46:09,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:46:09,345 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:46:09,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:09,346 INFO L225 Difference]: With dead ends: 94 [2021-07-13 19:46:09,346 INFO L226 Difference]: Without dead ends: 94 [2021-07-13 19:46:09,346 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 211.5ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:09,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-07-13 19:46:09,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 77. [2021-07-13 19:46:09,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.039473684210526) internal successors, (155), 76 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:09,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 155 transitions. [2021-07-13 19:46:09,347 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 155 transitions. Word has length 17 [2021-07-13 19:46:09,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:09,347 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 155 transitions. [2021-07-13 19:46:09,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:09,347 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 155 transitions. [2021-07-13 19:46:09,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:46:09,347 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:09,347 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:09,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4698,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:09,548 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:09,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:09,548 INFO L82 PathProgramCache]: Analyzing trace with hash 358504358, now seen corresponding path program 264 times [2021-07-13 19:46:09,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:09,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316563345] [2021-07-13 19:46:09,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:09,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:09,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:09,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:09,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316563345] [2021-07-13 19:46:09,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316563345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:09,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983819547] [2021-07-13 19:46:09,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:09,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:46:09,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:09,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:46:09,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:09,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:09,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983819547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:09,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:09,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:46:09,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617952229] [2021-07-13 19:46:09,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:46:09,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:09,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:46:09,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:46:09,831 INFO L87 Difference]: Start difference. First operand 77 states and 155 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:10,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:10,142 INFO L93 Difference]: Finished difference Result 100 states and 187 transitions. [2021-07-13 19:46:10,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:46:10,143 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:46:10,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:10,143 INFO L225 Difference]: With dead ends: 100 [2021-07-13 19:46:10,143 INFO L226 Difference]: Without dead ends: 96 [2021-07-13 19:46:10,143 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 355.7ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:46:10,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-07-13 19:46:10,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 76. [2021-07-13 19:46:10,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.026666666666667) internal successors, (152), 75 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:10,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 152 transitions. [2021-07-13 19:46:10,144 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 152 transitions. Word has length 17 [2021-07-13 19:46:10,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:10,144 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 152 transitions. [2021-07-13 19:46:10,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:10,145 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 152 transitions. [2021-07-13 19:46:10,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:46:10,145 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:10,145 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:10,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4701 [2021-07-13 19:46:10,345 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:10,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:10,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1318105967, now seen corresponding path program 265 times [2021-07-13 19:46:10,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:10,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419909365] [2021-07-13 19:46:10,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:10,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:10,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:10,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419909365] [2021-07-13 19:46:10,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419909365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:10,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47619156] [2021-07-13 19:46:10,452 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:10,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:10,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:46:10,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:10,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:10,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47619156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:10,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:10,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:46:10,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150179869] [2021-07-13 19:46:10,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:46:10,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:10,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:46:10,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:46:10,582 INFO L87 Difference]: Start difference. First operand 76 states and 152 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:10,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:10,746 INFO L93 Difference]: Finished difference Result 95 states and 188 transitions. [2021-07-13 19:46:10,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:46:10,746 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:46:10,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:10,747 INFO L225 Difference]: With dead ends: 95 [2021-07-13 19:46:10,747 INFO L226 Difference]: Without dead ends: 95 [2021-07-13 19:46:10,747 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 226.8ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:10,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-07-13 19:46:10,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2021-07-13 19:46:10,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.026666666666667) internal successors, (152), 75 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:10,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 152 transitions. [2021-07-13 19:46:10,748 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 152 transitions. Word has length 17 [2021-07-13 19:46:10,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:10,748 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 152 transitions. [2021-07-13 19:46:10,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:10,748 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 152 transitions. [2021-07-13 19:46:10,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:46:10,751 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:10,751 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:10,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4707 [2021-07-13 19:46:10,952 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:10,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:10,952 INFO L82 PathProgramCache]: Analyzing trace with hash -654188174, now seen corresponding path program 266 times [2021-07-13 19:46:10,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:10,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191280534] [2021-07-13 19:46:10,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:10,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:11,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:11,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:11,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191280534] [2021-07-13 19:46:11,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191280534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:11,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080082993] [2021-07-13 19:46:11,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:11,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:46:11,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:11,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:46:11,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:11,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:11,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080082993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:11,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:11,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:46:11,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756315002] [2021-07-13 19:46:11,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:46:11,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:11,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:46:11,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:46:11,187 INFO L87 Difference]: Start difference. First operand 76 states and 152 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:11,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:11,472 INFO L93 Difference]: Finished difference Result 100 states and 185 transitions. [2021-07-13 19:46:11,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:46:11,472 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:46:11,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:11,472 INFO L225 Difference]: With dead ends: 100 [2021-07-13 19:46:11,472 INFO L226 Difference]: Without dead ends: 94 [2021-07-13 19:46:11,473 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 331.8ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:46:11,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-07-13 19:46:11,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2021-07-13 19:46:11,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:11,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 149 transitions. [2021-07-13 19:46:11,474 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 149 transitions. Word has length 17 [2021-07-13 19:46:11,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:11,474 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 149 transitions. [2021-07-13 19:46:11,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:11,474 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 149 transitions. [2021-07-13 19:46:11,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:46:11,474 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:11,474 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:11,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4710,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:11,674 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:11,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:11,675 INFO L82 PathProgramCache]: Analyzing trace with hash -453490593, now seen corresponding path program 267 times [2021-07-13 19:46:11,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:11,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499530866] [2021-07-13 19:46:11,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:11,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:11,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:11,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:11,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499530866] [2021-07-13 19:46:11,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499530866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:11,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798178670] [2021-07-13 19:46:11,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:11,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:46:11,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:11,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:46:11,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:11,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:11,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798178670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:11,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:11,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:46:11,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157384867] [2021-07-13 19:46:11,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:46:11,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:11,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:46:11,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:46:11,863 INFO L87 Difference]: Start difference. First operand 75 states and 149 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:12,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:12,042 INFO L93 Difference]: Finished difference Result 104 states and 194 transitions. [2021-07-13 19:46:12,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:46:12,043 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:46:12,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:12,043 INFO L225 Difference]: With dead ends: 104 [2021-07-13 19:46:12,043 INFO L226 Difference]: Without dead ends: 104 [2021-07-13 19:46:12,043 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 227.9ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:12,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-07-13 19:46:12,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 67. [2021-07-13 19:46:12,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9848484848484849) internal successors, (131), 66 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:12,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 131 transitions. [2021-07-13 19:46:12,044 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 131 transitions. Word has length 17 [2021-07-13 19:46:12,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:12,044 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 131 transitions. [2021-07-13 19:46:12,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:12,044 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 131 transitions. [2021-07-13 19:46:12,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:46:12,044 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:12,044 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:12,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4717 [2021-07-13 19:46:12,245 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:12,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:12,245 INFO L82 PathProgramCache]: Analyzing trace with hash -499750656, now seen corresponding path program 268 times [2021-07-13 19:46:12,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:12,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862390032] [2021-07-13 19:46:12,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:12,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:12,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:12,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:12,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862390032] [2021-07-13 19:46:12,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862390032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:12,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657080905] [2021-07-13 19:46:12,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:12,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:46:12,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:12,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:46:12,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:12,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:12,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657080905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:12,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:12,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:46:12,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45153661] [2021-07-13 19:46:12,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:46:12,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:12,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:46:12,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:46:12,460 INFO L87 Difference]: Start difference. First operand 67 states and 131 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:12,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:12,701 INFO L93 Difference]: Finished difference Result 75 states and 141 transitions. [2021-07-13 19:46:12,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:46:12,702 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:46:12,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:12,702 INFO L225 Difference]: With dead ends: 75 [2021-07-13 19:46:12,702 INFO L226 Difference]: Without dead ends: 67 [2021-07-13 19:46:12,702 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 292.7ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:46:12,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-07-13 19:46:12,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-07-13 19:46:12,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9696969696969697) internal successors, (130), 66 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:12,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 130 transitions. [2021-07-13 19:46:12,703 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 130 transitions. Word has length 17 [2021-07-13 19:46:12,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:12,703 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 130 transitions. [2021-07-13 19:46:12,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:12,703 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 130 transitions. [2021-07-13 19:46:12,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:12,703 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:12,703 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:12,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4720,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:12,904 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:12,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:12,904 INFO L82 PathProgramCache]: Analyzing trace with hash -287533742, now seen corresponding path program 269 times [2021-07-13 19:46:12,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:12,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964006568] [2021-07-13 19:46:12,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:12,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:13,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:13,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:13,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964006568] [2021-07-13 19:46:13,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964006568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:13,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048755774] [2021-07-13 19:46:13,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:13,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:46:13,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:13,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:46:13,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:13,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:13,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048755774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:13,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:13,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-07-13 19:46:13,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057764441] [2021-07-13 19:46:13,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:46:13,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:13,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:46:13,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:46:13,299 INFO L87 Difference]: Start difference. First operand 67 states and 130 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:13,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:13,841 INFO L93 Difference]: Finished difference Result 120 states and 226 transitions. [2021-07-13 19:46:13,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:46:13,841 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:46:13,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:13,842 INFO L225 Difference]: With dead ends: 120 [2021-07-13 19:46:13,842 INFO L226 Difference]: Without dead ends: 113 [2021-07-13 19:46:13,842 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 667.1ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:46:13,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-07-13 19:46:13,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 77. [2021-07-13 19:46:13,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 76 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:13,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 149 transitions. [2021-07-13 19:46:13,843 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 149 transitions. Word has length 18 [2021-07-13 19:46:13,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:13,843 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 149 transitions. [2021-07-13 19:46:13,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:13,843 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 149 transitions. [2021-07-13 19:46:13,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:13,843 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:13,843 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:14,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4726 [2021-07-13 19:46:14,044 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:14,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:14,044 INFO L82 PathProgramCache]: Analyzing trace with hash -277178606, now seen corresponding path program 270 times [2021-07-13 19:46:14,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:14,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625752923] [2021-07-13 19:46:14,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:14,224 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:14,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:14,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625752923] [2021-07-13 19:46:14,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625752923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:14,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274030549] [2021-07-13 19:46:14,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:14,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:46:14,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:14,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:46:14,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:14,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:14,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274030549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:14,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:14,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-13 19:46:14,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636212185] [2021-07-13 19:46:14,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:46:14,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:14,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:46:14,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:46:14,473 INFO L87 Difference]: Start difference. First operand 77 states and 149 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:14,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:14,898 INFO L93 Difference]: Finished difference Result 124 states and 234 transitions. [2021-07-13 19:46:14,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:46:14,898 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:46:14,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:14,898 INFO L225 Difference]: With dead ends: 124 [2021-07-13 19:46:14,899 INFO L226 Difference]: Without dead ends: 117 [2021-07-13 19:46:14,899 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 575.5ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:46:14,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-07-13 19:46:14,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 78. [2021-07-13 19:46:14,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.974025974025974) internal successors, (152), 77 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:14,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 152 transitions. [2021-07-13 19:46:14,900 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 152 transitions. Word has length 18 [2021-07-13 19:46:14,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:14,900 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 152 transitions. [2021-07-13 19:46:14,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:14,900 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 152 transitions. [2021-07-13 19:46:14,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:14,901 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:14,901 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:15,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4739,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:15,117 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:15,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:15,117 INFO L82 PathProgramCache]: Analyzing trace with hash 858925398, now seen corresponding path program 271 times [2021-07-13 19:46:15,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:15,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063869150] [2021-07-13 19:46:15,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:15,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:15,280 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:15,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:15,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063869150] [2021-07-13 19:46:15,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063869150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:15,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838532891] [2021-07-13 19:46:15,280 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:15,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:15,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:46:15,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:15,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:15,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838532891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:15,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:15,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-07-13 19:46:15,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143704113] [2021-07-13 19:46:15,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:46:15,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:15,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:46:15,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:46:15,507 INFO L87 Difference]: Start difference. First operand 78 states and 152 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:15,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:15,876 INFO L93 Difference]: Finished difference Result 125 states and 237 transitions. [2021-07-13 19:46:15,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:46:15,876 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:46:15,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:15,877 INFO L225 Difference]: With dead ends: 125 [2021-07-13 19:46:15,877 INFO L226 Difference]: Without dead ends: 118 [2021-07-13 19:46:15,877 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 489.5ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:46:15,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-07-13 19:46:15,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 79. [2021-07-13 19:46:15,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.9871794871794872) internal successors, (155), 78 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:15,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 155 transitions. [2021-07-13 19:46:15,878 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 155 transitions. Word has length 18 [2021-07-13 19:46:15,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:15,878 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 155 transitions. [2021-07-13 19:46:15,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:15,878 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 155 transitions. [2021-07-13 19:46:15,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:15,878 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:15,878 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:16,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4753,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:16,079 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:16,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:16,079 INFO L82 PathProgramCache]: Analyzing trace with hash 618479250, now seen corresponding path program 272 times [2021-07-13 19:46:16,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:16,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58979245] [2021-07-13 19:46:16,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:16,403 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:16,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:16,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58979245] [2021-07-13 19:46:16,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58979245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:16,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904768790] [2021-07-13 19:46:16,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:16,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:46:16,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:16,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:46:16,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:16,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:16,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904768790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:16,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:16,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-13 19:46:16,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057600709] [2021-07-13 19:46:16,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:46:16,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:16,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:46:16,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:46:16,669 INFO L87 Difference]: Start difference. First operand 79 states and 155 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:17,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:17,007 INFO L93 Difference]: Finished difference Result 126 states and 240 transitions. [2021-07-13 19:46:17,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:46:17,008 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:46:17,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:17,008 INFO L225 Difference]: With dead ends: 126 [2021-07-13 19:46:17,008 INFO L226 Difference]: Without dead ends: 119 [2021-07-13 19:46:17,008 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 635.0ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:46:17,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-07-13 19:46:17,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 80. [2021-07-13 19:46:17,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0) internal successors, (158), 79 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:17,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 158 transitions. [2021-07-13 19:46:17,009 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 158 transitions. Word has length 18 [2021-07-13 19:46:17,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:17,009 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 158 transitions. [2021-07-13 19:46:17,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:17,009 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 158 transitions. [2021-07-13 19:46:17,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:17,010 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:17,010 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:17,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4767 [2021-07-13 19:46:17,210 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:17,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:17,210 INFO L82 PathProgramCache]: Analyzing trace with hash -82013738, now seen corresponding path program 273 times [2021-07-13 19:46:17,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:17,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381883245] [2021-07-13 19:46:17,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:17,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:17,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381883245] [2021-07-13 19:46:17,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381883245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:17,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936842377] [2021-07-13 19:46:17,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:17,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:46:17,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:17,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:46:17,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:17,597 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:17,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936842377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:17,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:17,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-07-13 19:46:17,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567670466] [2021-07-13 19:46:17,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:46:17,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:17,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:46:17,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:17,598 INFO L87 Difference]: Start difference. First operand 80 states and 158 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:17,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:17,944 INFO L93 Difference]: Finished difference Result 138 states and 259 transitions. [2021-07-13 19:46:17,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:46:17,944 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:46:17,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:17,945 INFO L225 Difference]: With dead ends: 138 [2021-07-13 19:46:17,945 INFO L226 Difference]: Without dead ends: 131 [2021-07-13 19:46:17,945 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 465.8ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:46:17,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-07-13 19:46:17,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 81. [2021-07-13 19:46:17,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.025) internal successors, (162), 80 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:17,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 162 transitions. [2021-07-13 19:46:17,946 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 162 transitions. Word has length 18 [2021-07-13 19:46:17,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:17,946 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 162 transitions. [2021-07-13 19:46:17,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:17,946 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 162 transitions. [2021-07-13 19:46:17,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:17,946 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:17,946 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:18,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4778,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:18,147 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:18,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:18,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1609570898, now seen corresponding path program 274 times [2021-07-13 19:46:18,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:18,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025142953] [2021-07-13 19:46:18,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:18,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:18,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:18,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:18,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025142953] [2021-07-13 19:46:18,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025142953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:18,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290216177] [2021-07-13 19:46:18,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:18,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:46:18,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:18,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:46:18,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:18,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:18,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290216177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:18,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:18,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-07-13 19:46:18,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383075822] [2021-07-13 19:46:18,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:46:18,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:18,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:46:18,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:18,553 INFO L87 Difference]: Start difference. First operand 81 states and 162 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:18,859 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-07-13 19:46:18,977 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-07-13 19:46:18,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:18,992 INFO L93 Difference]: Finished difference Result 126 states and 241 transitions. [2021-07-13 19:46:18,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:46:18,992 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:46:18,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:18,993 INFO L225 Difference]: With dead ends: 126 [2021-07-13 19:46:18,993 INFO L226 Difference]: Without dead ends: 119 [2021-07-13 19:46:18,993 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 552.4ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:46:18,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-07-13 19:46:18,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 81. [2021-07-13 19:46:18,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.025) internal successors, (162), 80 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:18,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 162 transitions. [2021-07-13 19:46:18,995 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 162 transitions. Word has length 18 [2021-07-13 19:46:18,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:18,995 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 162 transitions. [2021-07-13 19:46:18,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:18,995 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 162 transitions. [2021-07-13 19:46:18,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:18,995 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:18,995 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:19,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4790 [2021-07-13 19:46:19,209 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:19,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:19,209 INFO L82 PathProgramCache]: Analyzing trace with hash 628775332, now seen corresponding path program 275 times [2021-07-13 19:46:19,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:19,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038116560] [2021-07-13 19:46:19,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:19,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:19,600 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:19,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:19,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038116560] [2021-07-13 19:46:19,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038116560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:19,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632558327] [2021-07-13 19:46:19,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:19,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:46:19,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:19,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:46:19,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:20,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:20,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632558327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:20,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:20,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:46:20,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337457144] [2021-07-13 19:46:20,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:46:20,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:20,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:46:20,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:46:20,070 INFO L87 Difference]: Start difference. First operand 81 states and 162 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:20,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:20,678 INFO L93 Difference]: Finished difference Result 104 states and 201 transitions. [2021-07-13 19:46:20,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:46:20,678 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:46:20,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:20,679 INFO L225 Difference]: With dead ends: 104 [2021-07-13 19:46:20,679 INFO L226 Difference]: Without dead ends: 97 [2021-07-13 19:46:20,679 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 996.4ms TimeCoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:46:20,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-07-13 19:46:20,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 83. [2021-07-13 19:46:20,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0365853658536586) internal successors, (167), 82 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:20,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 167 transitions. [2021-07-13 19:46:20,680 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 167 transitions. Word has length 18 [2021-07-13 19:46:20,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:20,681 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 167 transitions. [2021-07-13 19:46:20,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:20,681 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 167 transitions. [2021-07-13 19:46:20,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:20,681 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:20,681 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:20,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4803,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:20,897 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:20,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:20,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1764879336, now seen corresponding path program 276 times [2021-07-13 19:46:20,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:20,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041634790] [2021-07-13 19:46:20,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:20,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:21,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:21,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:21,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041634790] [2021-07-13 19:46:21,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041634790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:21,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247699305] [2021-07-13 19:46:21,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:21,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:46:21,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:21,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:46:21,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:21,504 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:21,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247699305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:21,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:21,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:46:21,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469834507] [2021-07-13 19:46:21,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:46:21,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:21,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:46:21,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:46:21,505 INFO L87 Difference]: Start difference. First operand 83 states and 167 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:21,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:21,803 INFO L93 Difference]: Finished difference Result 108 states and 209 transitions. [2021-07-13 19:46:21,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:46:21,803 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:46:21,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:21,803 INFO L225 Difference]: With dead ends: 108 [2021-07-13 19:46:21,803 INFO L226 Difference]: Without dead ends: 101 [2021-07-13 19:46:21,804 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 494.9ms TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:46:21,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-07-13 19:46:21,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 84. [2021-07-13 19:46:21,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0481927710843375) internal successors, (170), 83 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:21,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 170 transitions. [2021-07-13 19:46:21,805 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 170 transitions. Word has length 18 [2021-07-13 19:46:21,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:21,805 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 170 transitions. [2021-07-13 19:46:21,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:21,805 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 170 transitions. [2021-07-13 19:46:21,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:21,805 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:21,805 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:22,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4850,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:22,009 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:22,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:22,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1524433188, now seen corresponding path program 277 times [2021-07-13 19:46:22,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:22,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476886081] [2021-07-13 19:46:22,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:22,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:22,255 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:22,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:22,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476886081] [2021-07-13 19:46:22,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476886081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:22,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903364248] [2021-07-13 19:46:22,256 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:22,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:22,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:46:22,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:22,651 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:22,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903364248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:22,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:22,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-13 19:46:22,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039108207] [2021-07-13 19:46:22,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:46:22,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:22,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:46:22,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:46:22,652 INFO L87 Difference]: Start difference. First operand 84 states and 170 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:22,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:22,916 INFO L93 Difference]: Finished difference Result 109 states and 212 transitions. [2021-07-13 19:46:22,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:46:22,917 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:46:22,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:22,917 INFO L225 Difference]: With dead ends: 109 [2021-07-13 19:46:22,917 INFO L226 Difference]: Without dead ends: 102 [2021-07-13 19:46:22,917 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 555.9ms TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:46:22,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-07-13 19:46:22,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 85. [2021-07-13 19:46:22,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 84 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:22,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 173 transitions. [2021-07-13 19:46:22,918 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 173 transitions. Word has length 18 [2021-07-13 19:46:22,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:22,918 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 173 transitions. [2021-07-13 19:46:22,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:22,918 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 173 transitions. [2021-07-13 19:46:22,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:22,918 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:22,918 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:23,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4897,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:23,119 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:23,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:23,119 INFO L82 PathProgramCache]: Analyzing trace with hash 823940200, now seen corresponding path program 278 times [2021-07-13 19:46:23,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:23,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137950173] [2021-07-13 19:46:23,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:23,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:23,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:23,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:23,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137950173] [2021-07-13 19:46:23,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137950173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:23,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010650664] [2021-07-13 19:46:23,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:23,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:46:23,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:23,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:46:23,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:23,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:23,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010650664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:23,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:23,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:46:23,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600380207] [2021-07-13 19:46:23,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:46:23,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:23,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:46:23,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:46:23,737 INFO L87 Difference]: Start difference. First operand 85 states and 173 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:24,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:24,319 INFO L93 Difference]: Finished difference Result 121 states and 228 transitions. [2021-07-13 19:46:24,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:46:24,320 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:46:24,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:24,320 INFO L225 Difference]: With dead ends: 121 [2021-07-13 19:46:24,320 INFO L226 Difference]: Without dead ends: 111 [2021-07-13 19:46:24,320 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 735.0ms TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:46:24,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-07-13 19:46:24,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 86. [2021-07-13 19:46:24,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.070588235294118) internal successors, (176), 85 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:24,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 176 transitions. [2021-07-13 19:46:24,321 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 176 transitions. Word has length 18 [2021-07-13 19:46:24,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:24,322 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 176 transitions. [2021-07-13 19:46:24,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:24,322 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 176 transitions. [2021-07-13 19:46:24,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:24,322 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:24,322 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:24,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4931,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:24,522 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:24,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:24,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1779442460, now seen corresponding path program 279 times [2021-07-13 19:46:24,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:24,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937202693] [2021-07-13 19:46:24,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:24,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:24,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:24,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:24,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937202693] [2021-07-13 19:46:24,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937202693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:24,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746970361] [2021-07-13 19:46:24,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:24,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:46:24,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:24,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:46:24,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:25,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:25,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746970361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:25,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:25,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-13 19:46:25,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169938681] [2021-07-13 19:46:25,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:46:25,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:25,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:46:25,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:46:25,180 INFO L87 Difference]: Start difference. First operand 86 states and 176 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:25,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:25,512 INFO L93 Difference]: Finished difference Result 109 states and 212 transitions. [2021-07-13 19:46:25,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:46:25,513 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:46:25,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:25,513 INFO L225 Difference]: With dead ends: 109 [2021-07-13 19:46:25,513 INFO L226 Difference]: Without dead ends: 102 [2021-07-13 19:46:25,513 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 592.1ms TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:46:25,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-07-13 19:46:25,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 86. [2021-07-13 19:46:25,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.070588235294118) internal successors, (176), 85 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:25,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 176 transitions. [2021-07-13 19:46:25,514 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 176 transitions. Word has length 18 [2021-07-13 19:46:25,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:25,514 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 176 transitions. [2021-07-13 19:46:25,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:25,514 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 176 transitions. [2021-07-13 19:46:25,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:25,514 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:25,514 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:25,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4977 [2021-07-13 19:46:25,715 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:25,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:25,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1489852162, now seen corresponding path program 280 times [2021-07-13 19:46:25,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:25,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965475573] [2021-07-13 19:46:25,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:25,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:25,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:25,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:25,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965475573] [2021-07-13 19:46:25,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965475573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:25,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989804035] [2021-07-13 19:46:25,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:25,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:46:25,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:25,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:46:25,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:26,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:26,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989804035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:26,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:26,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-13 19:46:26,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433560464] [2021-07-13 19:46:26,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:46:26,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:26,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:46:26,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:46:26,208 INFO L87 Difference]: Start difference. First operand 86 states and 176 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:26,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:26,816 INFO L93 Difference]: Finished difference Result 158 states and 302 transitions. [2021-07-13 19:46:26,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:46:26,816 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:46:26,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:26,817 INFO L225 Difference]: With dead ends: 158 [2021-07-13 19:46:26,817 INFO L226 Difference]: Without dead ends: 151 [2021-07-13 19:46:26,817 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 640.3ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:46:26,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-07-13 19:46:26,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 103. [2021-07-13 19:46:26,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.156862745098039) internal successors, (220), 102 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:26,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 220 transitions. [2021-07-13 19:46:26,818 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 220 transitions. Word has length 18 [2021-07-13 19:46:26,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:26,818 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 220 transitions. [2021-07-13 19:46:26,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:26,819 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 220 transitions. [2021-07-13 19:46:26,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:26,819 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:26,819 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:27,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5023 [2021-07-13 19:46:27,019 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:27,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:27,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1730298310, now seen corresponding path program 281 times [2021-07-13 19:46:27,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:27,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638190251] [2021-07-13 19:46:27,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:27,174 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:27,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:27,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638190251] [2021-07-13 19:46:27,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638190251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:27,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678423574] [2021-07-13 19:46:27,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:27,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:46:27,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:27,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:46:27,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:27,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:27,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678423574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:27,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:27,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:46:27,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304791898] [2021-07-13 19:46:27,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:46:27,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:27,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:46:27,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:46:27,554 INFO L87 Difference]: Start difference. First operand 103 states and 220 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:28,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:28,205 INFO L93 Difference]: Finished difference Result 159 states and 304 transitions. [2021-07-13 19:46:28,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:46:28,205 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:46:28,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:28,205 INFO L225 Difference]: With dead ends: 159 [2021-07-13 19:46:28,205 INFO L226 Difference]: Without dead ends: 152 [2021-07-13 19:46:28,205 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 680.8ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:46:28,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-07-13 19:46:28,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 103. [2021-07-13 19:46:28,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.156862745098039) internal successors, (220), 102 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:28,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 220 transitions. [2021-07-13 19:46:28,207 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 220 transitions. Word has length 18 [2021-07-13 19:46:28,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:28,207 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 220 transitions. [2021-07-13 19:46:28,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:28,207 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 220 transitions. [2021-07-13 19:46:28,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:28,207 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:28,207 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:28,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5057 [2021-07-13 19:46:28,408 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:28,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:28,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1864175998, now seen corresponding path program 282 times [2021-07-13 19:46:28,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:28,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875795835] [2021-07-13 19:46:28,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:28,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:28,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:28,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:28,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875795835] [2021-07-13 19:46:28,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875795835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:28,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173810794] [2021-07-13 19:46:28,547 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:28,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:46:28,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:28,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:46:28,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:28,879 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:28,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173810794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:28,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:28,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-07-13 19:46:28,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631916443] [2021-07-13 19:46:28,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:46:28,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:28,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:46:28,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:46:28,880 INFO L87 Difference]: Start difference. First operand 103 states and 220 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:29,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:29,489 INFO L93 Difference]: Finished difference Result 160 states and 307 transitions. [2021-07-13 19:46:29,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:46:29,489 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:46:29,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:29,489 INFO L225 Difference]: With dead ends: 160 [2021-07-13 19:46:29,489 INFO L226 Difference]: Without dead ends: 153 [2021-07-13 19:46:29,490 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 579.1ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:46:29,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-07-13 19:46:29,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 104. [2021-07-13 19:46:29,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.174757281553398) internal successors, (224), 103 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:29,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 224 transitions. [2021-07-13 19:46:29,491 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 224 transitions. Word has length 18 [2021-07-13 19:46:29,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:29,491 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 224 transitions. [2021-07-13 19:46:29,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:29,491 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 224 transitions. [2021-07-13 19:46:29,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:29,491 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:29,491 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:29,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5092,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:29,692 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:29,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:29,692 INFO L82 PathProgramCache]: Analyzing trace with hash -739206662, now seen corresponding path program 283 times [2021-07-13 19:46:29,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:29,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587993677] [2021-07-13 19:46:29,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:29,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:29,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:29,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:29,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587993677] [2021-07-13 19:46:29,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587993677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:29,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609734925] [2021-07-13 19:46:29,830 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:29,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:29,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:46:29,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:30,177 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:30,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609734925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:30,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:30,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-07-13 19:46:30,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798789961] [2021-07-13 19:46:30,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:46:30,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:30,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:46:30,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:46:30,179 INFO L87 Difference]: Start difference. First operand 104 states and 224 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:30,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:30,676 INFO L93 Difference]: Finished difference Result 148 states and 289 transitions. [2021-07-13 19:46:30,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:46:30,676 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:46:30,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:30,677 INFO L225 Difference]: With dead ends: 148 [2021-07-13 19:46:30,677 INFO L226 Difference]: Without dead ends: 141 [2021-07-13 19:46:30,677 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 558.1ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:46:30,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-07-13 19:46:30,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 103. [2021-07-13 19:46:30,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.156862745098039) internal successors, (220), 102 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:30,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 220 transitions. [2021-07-13 19:46:30,678 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 220 transitions. Word has length 18 [2021-07-13 19:46:30,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:30,678 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 220 transitions. [2021-07-13 19:46:30,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:30,678 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 220 transitions. [2021-07-13 19:46:30,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:30,679 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:30,679 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:30,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5138,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:30,879 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:30,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:30,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1142552988, now seen corresponding path program 284 times [2021-07-13 19:46:30,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:30,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923986839] [2021-07-13 19:46:30,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:30,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:31,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:31,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:31,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923986839] [2021-07-13 19:46:31,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923986839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:31,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805935251] [2021-07-13 19:46:31,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:31,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:46:31,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:31,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:46:31,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:31,512 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:31,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805935251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:31,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:31,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:46:31,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165349630] [2021-07-13 19:46:31,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:46:31,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:31,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:46:31,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:46:31,513 INFO L87 Difference]: Start difference. First operand 103 states and 220 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:32,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:32,114 INFO L93 Difference]: Finished difference Result 210 states and 415 transitions. [2021-07-13 19:46:32,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:46:32,115 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:46:32,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:32,115 INFO L225 Difference]: With dead ends: 210 [2021-07-13 19:46:32,115 INFO L226 Difference]: Without dead ends: 203 [2021-07-13 19:46:32,115 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 726.9ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:46:32,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-07-13 19:46:32,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 118. [2021-07-13 19:46:32,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.2564102564102564) internal successors, (264), 117 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:32,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 264 transitions. [2021-07-13 19:46:32,117 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 264 transitions. Word has length 18 [2021-07-13 19:46:32,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:32,117 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 264 transitions. [2021-07-13 19:46:32,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:32,117 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 264 transitions. [2021-07-13 19:46:32,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:32,117 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:32,118 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:32,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5185 [2021-07-13 19:46:32,318 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:32,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:32,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1843045976, now seen corresponding path program 285 times [2021-07-13 19:46:32,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:32,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73038772] [2021-07-13 19:46:32,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:32,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:32,525 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:32,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:32,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73038772] [2021-07-13 19:46:32,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73038772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:32,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99942633] [2021-07-13 19:46:32,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:32,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:46:32,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:32,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:46:32,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:32,884 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:32,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99942633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:32,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:32,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-07-13 19:46:32,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268500425] [2021-07-13 19:46:32,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:46:32,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:32,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:46:32,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:46:32,885 INFO L87 Difference]: Start difference. First operand 118 states and 264 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:33,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:33,416 INFO L93 Difference]: Finished difference Result 227 states and 443 transitions. [2021-07-13 19:46:33,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:46:33,417 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:46:33,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:33,417 INFO L225 Difference]: With dead ends: 227 [2021-07-13 19:46:33,417 INFO L226 Difference]: Without dead ends: 220 [2021-07-13 19:46:33,417 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 655.5ms TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:46:33,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-07-13 19:46:33,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 119. [2021-07-13 19:46:33,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.2711864406779663) internal successors, (268), 118 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:33,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 268 transitions. [2021-07-13 19:46:33,419 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 268 transitions. Word has length 18 [2021-07-13 19:46:33,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:33,419 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 268 transitions. [2021-07-13 19:46:33,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:33,420 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 268 transitions. [2021-07-13 19:46:33,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:33,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:33,420 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:33,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5232,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:33,643 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:33,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:33,643 INFO L82 PathProgramCache]: Analyzing trace with hash -151461340, now seen corresponding path program 286 times [2021-07-13 19:46:33,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:33,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856650057] [2021-07-13 19:46:33,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:33,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:33,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:33,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856650057] [2021-07-13 19:46:33,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856650057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:33,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113935438] [2021-07-13 19:46:33,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:33,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:46:33,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:33,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:46:33,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:34,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:34,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113935438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:34,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:34,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-07-13 19:46:34,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959384525] [2021-07-13 19:46:34,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:46:34,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:34,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:46:34,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:46:34,137 INFO L87 Difference]: Start difference. First operand 119 states and 268 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:34,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:34,793 INFO L93 Difference]: Finished difference Result 215 states and 425 transitions. [2021-07-13 19:46:34,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:46:34,793 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:46:34,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:34,793 INFO L225 Difference]: With dead ends: 215 [2021-07-13 19:46:34,793 INFO L226 Difference]: Without dead ends: 208 [2021-07-13 19:46:34,793 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 673.5ms TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:46:34,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-07-13 19:46:34,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 118. [2021-07-13 19:46:34,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.2564102564102564) internal successors, (264), 117 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:34,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 264 transitions. [2021-07-13 19:46:34,795 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 264 transitions. Word has length 18 [2021-07-13 19:46:34,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:34,795 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 264 transitions. [2021-07-13 19:46:34,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:34,795 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 264 transitions. [2021-07-13 19:46:34,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:34,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:34,796 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:34,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5279 [2021-07-13 19:46:34,996 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:34,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:34,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1916691518, now seen corresponding path program 287 times [2021-07-13 19:46:34,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:34,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379746373] [2021-07-13 19:46:34,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:35,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:35,120 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:35,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:35,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379746373] [2021-07-13 19:46:35,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379746373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:35,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849888522] [2021-07-13 19:46:35,121 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:35,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:46:35,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:35,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:46:35,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:35,512 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:35,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849888522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:35,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:35,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-07-13 19:46:35,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581516297] [2021-07-13 19:46:35,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:46:35,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:35,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:46:35,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:46:35,513 INFO L87 Difference]: Start difference. First operand 118 states and 264 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:36,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:36,007 INFO L93 Difference]: Finished difference Result 226 states and 445 transitions. [2021-07-13 19:46:36,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:46:36,007 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:46:36,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:36,008 INFO L225 Difference]: With dead ends: 226 [2021-07-13 19:46:36,008 INFO L226 Difference]: Without dead ends: 219 [2021-07-13 19:46:36,008 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 392.1ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:46:36,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-07-13 19:46:36,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 121. [2021-07-13 19:46:36,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.2916666666666665) internal successors, (275), 120 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:36,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 275 transitions. [2021-07-13 19:46:36,010 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 275 transitions. Word has length 18 [2021-07-13 19:46:36,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:36,010 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 275 transitions. [2021-07-13 19:46:36,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:36,010 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 275 transitions. [2021-07-13 19:46:36,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:36,010 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:36,010 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:36,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5325,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:36,211 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:36,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:36,211 INFO L82 PathProgramCache]: Analyzing trace with hash -686691142, now seen corresponding path program 288 times [2021-07-13 19:46:36,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:36,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600241037] [2021-07-13 19:46:36,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:36,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:36,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:36,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:36,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600241037] [2021-07-13 19:46:36,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600241037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:36,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647171174] [2021-07-13 19:46:36,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:36,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:46:36,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:36,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:46:36,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:36,873 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:36,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647171174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:36,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:36,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-13 19:46:36,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876249705] [2021-07-13 19:46:36,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:46:36,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:36,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:46:36,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:46:36,874 INFO L87 Difference]: Start difference. First operand 121 states and 275 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:37,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:37,461 INFO L93 Difference]: Finished difference Result 228 states and 447 transitions. [2021-07-13 19:46:37,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:46:37,461 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:46:37,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:37,461 INFO L225 Difference]: With dead ends: 228 [2021-07-13 19:46:37,461 INFO L226 Difference]: Without dead ends: 221 [2021-07-13 19:46:37,462 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 606.7ms TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:46:37,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-07-13 19:46:37,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 120. [2021-07-13 19:46:37,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.277310924369748) internal successors, (271), 119 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:37,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 271 transitions. [2021-07-13 19:46:37,463 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 271 transitions. Word has length 18 [2021-07-13 19:46:37,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:37,463 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 271 transitions. [2021-07-13 19:46:37,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:37,463 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 271 transitions. [2021-07-13 19:46:37,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:37,464 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:37,464 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:37,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5438 [2021-07-13 19:46:37,664 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:37,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:37,665 INFO L82 PathProgramCache]: Analyzing trace with hash -513443450, now seen corresponding path program 289 times [2021-07-13 19:46:37,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:37,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977673600] [2021-07-13 19:46:37,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:37,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:37,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:37,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977673600] [2021-07-13 19:46:37,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977673600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:37,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208407687] [2021-07-13 19:46:37,788 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:37,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:37,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:46:37,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:38,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:38,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208407687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:38,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:38,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-13 19:46:38,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138641038] [2021-07-13 19:46:38,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:46:38,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:38,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:46:38,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:46:38,158 INFO L87 Difference]: Start difference. First operand 120 states and 271 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:38,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:38,600 INFO L93 Difference]: Finished difference Result 211 states and 419 transitions. [2021-07-13 19:46:38,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:46:38,600 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:46:38,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:38,601 INFO L225 Difference]: With dead ends: 211 [2021-07-13 19:46:38,601 INFO L226 Difference]: Without dead ends: 204 [2021-07-13 19:46:38,601 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 458.7ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:46:38,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-07-13 19:46:38,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 122. [2021-07-13 19:46:38,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.28099173553719) internal successors, (276), 121 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:38,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 276 transitions. [2021-07-13 19:46:38,602 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 276 transitions. Word has length 18 [2021-07-13 19:46:38,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:38,603 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 276 transitions. [2021-07-13 19:46:38,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:38,605 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 276 transitions. [2021-07-13 19:46:38,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:38,605 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:38,605 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:38,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5551 [2021-07-13 19:46:38,806 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:38,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:38,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1351423662, now seen corresponding path program 290 times [2021-07-13 19:46:38,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:38,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164836117] [2021-07-13 19:46:38,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:38,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:39,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:39,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:39,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164836117] [2021-07-13 19:46:39,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164836117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:39,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667569244] [2021-07-13 19:46:39,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:39,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:46:39,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:39,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:46:39,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:39,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:39,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667569244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:39,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:39,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:46:39,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709483032] [2021-07-13 19:46:39,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:46:39,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:39,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:46:39,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:46:39,615 INFO L87 Difference]: Start difference. First operand 122 states and 276 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:40,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:40,056 INFO L93 Difference]: Finished difference Result 237 states and 477 transitions. [2021-07-13 19:46:40,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:46:40,056 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:46:40,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:40,057 INFO L225 Difference]: With dead ends: 237 [2021-07-13 19:46:40,057 INFO L226 Difference]: Without dead ends: 230 [2021-07-13 19:46:40,057 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 776.5ms TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:46:40,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-07-13 19:46:40,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 141. [2021-07-13 19:46:40,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.3285714285714287) internal successors, (326), 140 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:40,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 326 transitions. [2021-07-13 19:46:40,059 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 326 transitions. Word has length 18 [2021-07-13 19:46:40,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:40,059 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 326 transitions. [2021-07-13 19:46:40,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:40,059 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 326 transitions. [2021-07-13 19:46:40,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:40,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:40,059 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:40,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5623,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:40,260 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:40,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:40,260 INFO L82 PathProgramCache]: Analyzing trace with hash -215319658, now seen corresponding path program 291 times [2021-07-13 19:46:40,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:40,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11274365] [2021-07-13 19:46:40,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:40,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:40,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:40,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:40,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11274365] [2021-07-13 19:46:40,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11274365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:40,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501525857] [2021-07-13 19:46:40,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:40,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:46:40,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:40,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:46:40,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:40,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:40,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501525857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:40,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:40,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:46:40,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053516946] [2021-07-13 19:46:40,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:46:40,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:40,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:46:40,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:46:40,843 INFO L87 Difference]: Start difference. First operand 141 states and 326 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:41,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:41,556 INFO L93 Difference]: Finished difference Result 278 states and 548 transitions. [2021-07-13 19:46:41,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:46:41,557 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:46:41,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:41,557 INFO L225 Difference]: With dead ends: 278 [2021-07-13 19:46:41,557 INFO L226 Difference]: Without dead ends: 271 [2021-07-13 19:46:41,557 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 685.2ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:46:41,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-07-13 19:46:41,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 144. [2021-07-13 19:46:41,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.3496503496503496) internal successors, (336), 143 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:41,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 336 transitions. [2021-07-13 19:46:41,559 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 336 transitions. Word has length 18 [2021-07-13 19:46:41,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:41,560 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 336 transitions. [2021-07-13 19:46:41,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:41,560 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 336 transitions. [2021-07-13 19:46:41,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:41,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:41,560 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:41,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5659,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:41,773 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:41,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:41,773 INFO L82 PathProgramCache]: Analyzing trace with hash -455765806, now seen corresponding path program 292 times [2021-07-13 19:46:41,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:41,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641922231] [2021-07-13 19:46:41,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:41,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:41,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:41,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641922231] [2021-07-13 19:46:41,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641922231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:41,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242659559] [2021-07-13 19:46:41,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:42,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:46:42,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:42,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:46:42,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:42,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:42,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242659559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:42,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:42,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:46:42,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770890343] [2021-07-13 19:46:42,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:46:42,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:42,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:46:42,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:46:42,414 INFO L87 Difference]: Start difference. First operand 144 states and 336 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:43,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:43,045 INFO L93 Difference]: Finished difference Result 279 states and 555 transitions. [2021-07-13 19:46:43,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:46:43,045 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:46:43,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:43,046 INFO L225 Difference]: With dead ends: 279 [2021-07-13 19:46:43,046 INFO L226 Difference]: Without dead ends: 272 [2021-07-13 19:46:43,046 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 734.0ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:46:43,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-07-13 19:46:43,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 146. [2021-07-13 19:46:43,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.3655172413793104) internal successors, (343), 145 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:43,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 343 transitions. [2021-07-13 19:46:43,048 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 343 transitions. Word has length 18 [2021-07-13 19:46:43,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:43,048 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 343 transitions. [2021-07-13 19:46:43,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:43,048 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 343 transitions. [2021-07-13 19:46:43,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:43,049 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:43,049 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:43,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5705 [2021-07-13 19:46:43,249 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:43,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:43,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1156258794, now seen corresponding path program 293 times [2021-07-13 19:46:43,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:43,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519017647] [2021-07-13 19:46:43,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:43,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:43,433 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:43,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:43,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519017647] [2021-07-13 19:46:43,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519017647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:43,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253080794] [2021-07-13 19:46:43,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:43,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:46:43,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:43,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:46:43,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:43,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:43,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253080794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:43,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:43,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:46:43,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356354183] [2021-07-13 19:46:43,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:46:43,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:43,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:46:43,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:46:43,844 INFO L87 Difference]: Start difference. First operand 146 states and 343 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:44,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:44,570 INFO L93 Difference]: Finished difference Result 268 states and 542 transitions. [2021-07-13 19:46:44,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:46:44,571 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:46:44,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:44,571 INFO L225 Difference]: With dead ends: 268 [2021-07-13 19:46:44,571 INFO L226 Difference]: Without dead ends: 261 [2021-07-13 19:46:44,571 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 771.7ms TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:46:44,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-07-13 19:46:44,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 147. [2021-07-13 19:46:44,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.3767123287671232) internal successors, (347), 146 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:44,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 347 transitions. [2021-07-13 19:46:44,573 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 347 transitions. Word has length 18 [2021-07-13 19:46:44,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:44,573 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 347 transitions. [2021-07-13 19:46:44,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:44,574 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 347 transitions. [2021-07-13 19:46:44,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:44,574 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:44,574 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:44,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5739 [2021-07-13 19:46:44,774 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:44,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:44,775 INFO L82 PathProgramCache]: Analyzing trace with hash 535325842, now seen corresponding path program 294 times [2021-07-13 19:46:44,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:44,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465453974] [2021-07-13 19:46:44,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:44,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:45,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:45,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:45,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465453974] [2021-07-13 19:46:45,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465453974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:45,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233684688] [2021-07-13 19:46:45,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:45,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:46:45,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:45,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:46:45,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:45,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:45,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:45,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-07-13 19:46:45,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:45,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:45,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:45,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-07-13 19:46:45,431 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:45,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:45,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:45,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:46:45,441 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:45,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:45,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:45,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-07-13 19:46:45,449 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:45,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:45,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:45,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-07-13 19:46:45,456 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:45,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:46:45,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:46:45,462 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:45,606 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 53 [2021-07-13 19:46:45,606 INFO L628 ElimStorePlain]: treesize reduction 650, result has 12.5 percent of original size [2021-07-13 19:46:45,607 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:46:45,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:46:45,615 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:45,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:46:45,649 INFO L518 ElimStorePlain]: Eliminatee v_prenex_221 vanished before elimination [2021-07-13 19:46:45,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:46:45,653 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:46:45,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:46:45,684 INFO L518 ElimStorePlain]: Eliminatee v_prenex_223 vanished before elimination [2021-07-13 19:46:45,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:46:45,686 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:949, output treesize:85 [2021-07-13 19:46:45,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:45,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233684688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:45,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:45,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:46:45,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109059093] [2021-07-13 19:46:45,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:46:45,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:45,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:46:45,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:46:45,833 INFO L87 Difference]: Start difference. First operand 147 states and 347 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:46,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:46,543 INFO L93 Difference]: Finished difference Result 266 states and 541 transitions. [2021-07-13 19:46:46,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:46:46,543 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:46:46,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:46,544 INFO L225 Difference]: With dead ends: 266 [2021-07-13 19:46:46,544 INFO L226 Difference]: Without dead ends: 252 [2021-07-13 19:46:46,544 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 945.7ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:46:46,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-07-13 19:46:46,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 143. [2021-07-13 19:46:46,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.352112676056338) internal successors, (334), 142 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:46,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 334 transitions. [2021-07-13 19:46:46,546 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 334 transitions. Word has length 18 [2021-07-13 19:46:46,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:46,546 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 334 transitions. [2021-07-13 19:46:46,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:46,547 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 334 transitions. [2021-07-13 19:46:46,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:46,547 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:46,547 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:46,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5773 [2021-07-13 19:46:46,761 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:46,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:46,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1287512490, now seen corresponding path program 295 times [2021-07-13 19:46:46,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:46,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151064347] [2021-07-13 19:46:46,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:46,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:46,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:46,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151064347] [2021-07-13 19:46:46,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151064347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:46,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234726112] [2021-07-13 19:46:46,906 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:46,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:46,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:46:46,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:47,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:47,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234726112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:47,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:47,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 19:46:47,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013234744] [2021-07-13 19:46:47,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:46:47,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:47,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:46:47,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:46:47,304 INFO L87 Difference]: Start difference. First operand 143 states and 334 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:47,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:47,709 INFO L93 Difference]: Finished difference Result 220 states and 470 transitions. [2021-07-13 19:46:47,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:46:47,709 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:46:47,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:47,709 INFO L225 Difference]: With dead ends: 220 [2021-07-13 19:46:47,710 INFO L226 Difference]: Without dead ends: 213 [2021-07-13 19:46:47,710 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 501.5ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:46:47,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-07-13 19:46:47,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 151. [2021-07-13 19:46:47,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.3933333333333335) internal successors, (359), 150 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:47,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 359 transitions. [2021-07-13 19:46:47,712 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 359 transitions. Word has length 18 [2021-07-13 19:46:47,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:47,712 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 359 transitions. [2021-07-13 19:46:47,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:47,712 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 359 transitions. [2021-07-13 19:46:47,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:47,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:47,712 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:47,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5810,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:47,913 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:47,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:47,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1527958638, now seen corresponding path program 296 times [2021-07-13 19:46:47,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:47,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79265271] [2021-07-13 19:46:47,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:47,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:48,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:48,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:48,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79265271] [2021-07-13 19:46:48,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79265271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:48,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601391850] [2021-07-13 19:46:48,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:48,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:46:48,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:48,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:46:48,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:48,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:48,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601391850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:48,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:48,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-07-13 19:46:48,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964145263] [2021-07-13 19:46:48,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:46:48,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:48,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:46:48,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:46:48,456 INFO L87 Difference]: Start difference. First operand 151 states and 359 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:49,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:49,022 INFO L93 Difference]: Finished difference Result 242 states and 510 transitions. [2021-07-13 19:46:49,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:46:49,022 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:46:49,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:49,023 INFO L225 Difference]: With dead ends: 242 [2021-07-13 19:46:49,023 INFO L226 Difference]: Without dead ends: 235 [2021-07-13 19:46:49,023 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 648.3ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:46:49,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-07-13 19:46:49,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 153. [2021-07-13 19:46:49,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.4078947368421053) internal successors, (366), 152 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:49,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 366 transitions. [2021-07-13 19:46:49,025 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 366 transitions. Word has length 18 [2021-07-13 19:46:49,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:49,025 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 366 transitions. [2021-07-13 19:46:49,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:49,025 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 366 transitions. [2021-07-13 19:46:49,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:49,025 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:49,025 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:49,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5856 [2021-07-13 19:46:49,226 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:49,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:49,226 INFO L82 PathProgramCache]: Analyzing trace with hash 2066515670, now seen corresponding path program 297 times [2021-07-13 19:46:49,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:49,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035834363] [2021-07-13 19:46:49,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:49,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:49,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:49,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:49,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035834363] [2021-07-13 19:46:49,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035834363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:49,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226429917] [2021-07-13 19:46:49,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:49,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:46:49,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:49,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:46:49,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:49,656 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:49,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226429917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:49,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:49,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-07-13 19:46:49,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533792134] [2021-07-13 19:46:49,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:46:49,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:49,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:46:49,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:46:49,657 INFO L87 Difference]: Start difference. First operand 153 states and 366 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:50,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:50,161 INFO L93 Difference]: Finished difference Result 244 states and 515 transitions. [2021-07-13 19:46:50,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:46:50,162 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:46:50,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:50,162 INFO L225 Difference]: With dead ends: 244 [2021-07-13 19:46:50,162 INFO L226 Difference]: Without dead ends: 237 [2021-07-13 19:46:50,162 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 512.6ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:46:50,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-07-13 19:46:50,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 154. [2021-07-13 19:46:50,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.418300653594771) internal successors, (370), 153 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:50,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 370 transitions. [2021-07-13 19:46:50,164 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 370 transitions. Word has length 18 [2021-07-13 19:46:50,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:50,165 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 370 transitions. [2021-07-13 19:46:50,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:50,165 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 370 transitions. [2021-07-13 19:46:50,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:50,165 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:50,165 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:50,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5902,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:50,365 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:50,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:50,366 INFO L82 PathProgramCache]: Analyzing trace with hash -536866990, now seen corresponding path program 298 times [2021-07-13 19:46:50,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:50,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888282061] [2021-07-13 19:46:50,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:50,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:50,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:50,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888282061] [2021-07-13 19:46:50,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888282061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:50,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238835004] [2021-07-13 19:46:50,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:50,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:46:50,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:50,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:46:50,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:50,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:50,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238835004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:50,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:50,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-07-13 19:46:50,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084426773] [2021-07-13 19:46:50,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:46:50,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:50,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:46:50,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:46:50,829 INFO L87 Difference]: Start difference. First operand 154 states and 370 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:51,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:51,354 INFO L93 Difference]: Finished difference Result 229 states and 492 transitions. [2021-07-13 19:46:51,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:46:51,354 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:46:51,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:51,355 INFO L225 Difference]: With dead ends: 229 [2021-07-13 19:46:51,355 INFO L226 Difference]: Without dead ends: 222 [2021-07-13 19:46:51,355 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 535.2ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:46:51,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-07-13 19:46:51,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 151. [2021-07-13 19:46:51,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.3933333333333335) internal successors, (359), 150 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:51,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 359 transitions. [2021-07-13 19:46:51,357 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 359 transitions. Word has length 18 [2021-07-13 19:46:51,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:51,357 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 359 transitions. [2021-07-13 19:46:51,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:51,357 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 359 transitions. [2021-07-13 19:46:51,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:51,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:51,357 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:51,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5936 [2021-07-13 19:46:51,558 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:51,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:51,558 INFO L82 PathProgramCache]: Analyzing trace with hash 100022482, now seen corresponding path program 299 times [2021-07-13 19:46:51,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:51,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150934992] [2021-07-13 19:46:51,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:51,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:51,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:51,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:51,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150934992] [2021-07-13 19:46:51,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150934992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:51,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236205241] [2021-07-13 19:46:51,689 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:51,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:46:51,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:51,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:46:51,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:52,046 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:52,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236205241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:52,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:52,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 19:46:52,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235463134] [2021-07-13 19:46:52,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:46:52,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:52,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:46:52,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:46:52,046 INFO L87 Difference]: Start difference. First operand 151 states and 359 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:52,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:52,607 INFO L93 Difference]: Finished difference Result 246 states and 538 transitions. [2021-07-13 19:46:52,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:46:52,607 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:46:52,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:52,607 INFO L225 Difference]: With dead ends: 246 [2021-07-13 19:46:52,607 INFO L226 Difference]: Without dead ends: 239 [2021-07-13 19:46:52,608 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 581.1ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:46:52,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-07-13 19:46:52,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 164. [2021-07-13 19:46:52,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.441717791411043) internal successors, (398), 163 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:52,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 398 transitions. [2021-07-13 19:46:52,612 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 398 transitions. Word has length 18 [2021-07-13 19:46:52,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:52,613 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 398 transitions. [2021-07-13 19:46:52,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:52,613 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 398 transitions. [2021-07-13 19:46:52,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:52,613 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:52,613 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:52,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5970 [2021-07-13 19:46:52,813 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:52,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:52,814 INFO L82 PathProgramCache]: Analyzing trace with hash -600470506, now seen corresponding path program 300 times [2021-07-13 19:46:52,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:52,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724300073] [2021-07-13 19:46:52,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:52,931 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:52,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:52,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724300073] [2021-07-13 19:46:52,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724300073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:52,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397192755] [2021-07-13 19:46:52,932 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:52,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:46:52,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:52,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:46:52,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:53,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:53,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397192755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:53,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:53,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-07-13 19:46:53,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640543185] [2021-07-13 19:46:53,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:46:53,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:53,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:46:53,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:46:53,246 INFO L87 Difference]: Start difference. First operand 164 states and 398 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:53,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:53,673 INFO L93 Difference]: Finished difference Result 258 states and 554 transitions. [2021-07-13 19:46:53,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:46:53,673 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:46:53,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:53,674 INFO L225 Difference]: With dead ends: 258 [2021-07-13 19:46:53,674 INFO L226 Difference]: Without dead ends: 251 [2021-07-13 19:46:53,674 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 474.0ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:46:53,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-07-13 19:46:53,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 165. [2021-07-13 19:46:53,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.451219512195122) internal successors, (402), 164 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:53,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 402 transitions. [2021-07-13 19:46:53,676 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 402 transitions. Word has length 18 [2021-07-13 19:46:53,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:53,676 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 402 transitions. [2021-07-13 19:46:53,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:53,676 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 402 transitions. [2021-07-13 19:46:53,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:53,677 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:53,677 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:53,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6016,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:53,877 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:53,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:53,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1091114130, now seen corresponding path program 301 times [2021-07-13 19:46:53,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:53,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440539990] [2021-07-13 19:46:53,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:53,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:54,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:54,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:54,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440539990] [2021-07-13 19:46:54,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440539990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:54,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259095383] [2021-07-13 19:46:54,033 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:54,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:54,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:46:54,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:54,337 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:54,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259095383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:54,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:54,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-07-13 19:46:54,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558093206] [2021-07-13 19:46:54,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:46:54,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:54,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:46:54,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:46:54,338 INFO L87 Difference]: Start difference. First operand 165 states and 402 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:54,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:54,888 INFO L93 Difference]: Finished difference Result 243 states and 531 transitions. [2021-07-13 19:46:54,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:46:54,888 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:46:54,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:54,889 INFO L225 Difference]: With dead ends: 243 [2021-07-13 19:46:54,889 INFO L226 Difference]: Without dead ends: 236 [2021-07-13 19:46:54,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 574.8ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:46:54,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-07-13 19:46:54,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 164. [2021-07-13 19:46:54,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.441717791411043) internal successors, (398), 163 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:54,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 398 transitions. [2021-07-13 19:46:54,892 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 398 transitions. Word has length 18 [2021-07-13 19:46:54,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:54,892 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 398 transitions. [2021-07-13 19:46:54,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:54,892 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 398 transitions. [2021-07-13 19:46:54,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:54,892 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:54,892 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:55,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6062 [2021-07-13 19:46:55,115 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:55,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:55,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1135700308, now seen corresponding path program 302 times [2021-07-13 19:46:55,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:55,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093692409] [2021-07-13 19:46:55,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:55,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:55,234 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:46:55,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:55,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093692409] [2021-07-13 19:46:55,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093692409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:55,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950717384] [2021-07-13 19:46:55,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:55,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:46:55,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:55,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:46:55,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:55,772 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:55,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950717384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:55,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:55,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-07-13 19:46:55,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134394108] [2021-07-13 19:46:55,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:46:55,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:55,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:46:55,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:46:55,773 INFO L87 Difference]: Start difference. First operand 164 states and 398 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:56,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:56,221 INFO L93 Difference]: Finished difference Result 239 states and 522 transitions. [2021-07-13 19:46:56,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:46:56,222 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:46:56,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:56,222 INFO L225 Difference]: With dead ends: 239 [2021-07-13 19:46:56,222 INFO L226 Difference]: Without dead ends: 232 [2021-07-13 19:46:56,222 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 462.6ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:46:56,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-07-13 19:46:56,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 164. [2021-07-13 19:46:56,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.441717791411043) internal successors, (398), 163 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:56,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 398 transitions. [2021-07-13 19:46:56,224 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 398 transitions. Word has length 18 [2021-07-13 19:46:56,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:56,224 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 398 transitions. [2021-07-13 19:46:56,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:56,225 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 398 transitions. [2021-07-13 19:46:56,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:56,225 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:56,225 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:56,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6096 [2021-07-13 19:46:56,426 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:56,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:56,426 INFO L82 PathProgramCache]: Analyzing trace with hash 555884328, now seen corresponding path program 303 times [2021-07-13 19:46:56,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:56,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538359778] [2021-07-13 19:46:56,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:56,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:56,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:46:56,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:56,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538359778] [2021-07-13 19:46:56,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538359778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:56,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172715624] [2021-07-13 19:46:56,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:56,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:46:56,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:56,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:46:56,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:57,095 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:57,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172715624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:57,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:57,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-07-13 19:46:57,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086495395] [2021-07-13 19:46:57,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:46:57,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:57,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:46:57,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:46:57,096 INFO L87 Difference]: Start difference. First operand 164 states and 398 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:57,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:57,581 INFO L93 Difference]: Finished difference Result 240 states and 522 transitions. [2021-07-13 19:46:57,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:46:57,581 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:46:57,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:57,582 INFO L225 Difference]: With dead ends: 240 [2021-07-13 19:46:57,582 INFO L226 Difference]: Without dead ends: 233 [2021-07-13 19:46:57,582 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 485.9ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:46:57,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-07-13 19:46:57,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 163. [2021-07-13 19:46:57,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.432098765432099) internal successors, (394), 162 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:57,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 394 transitions. [2021-07-13 19:46:57,586 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 394 transitions. Word has length 18 [2021-07-13 19:46:57,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:57,587 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 394 transitions. [2021-07-13 19:46:57,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:57,587 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 394 transitions. [2021-07-13 19:46:57,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:57,587 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:57,587 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:57,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6282 [2021-07-13 19:46:57,787 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:57,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:57,788 INFO L82 PathProgramCache]: Analyzing trace with hash 729132020, now seen corresponding path program 304 times [2021-07-13 19:46:57,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:57,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937013715] [2021-07-13 19:46:57,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:57,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:58,035 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:58,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:58,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937013715] [2021-07-13 19:46:58,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937013715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:58,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363536422] [2021-07-13 19:46:58,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:58,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:46:58,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:58,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:46:58,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:58,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:58,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363536422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:58,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:58,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-13 19:46:58,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896010137] [2021-07-13 19:46:58,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:46:58,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:58,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:46:58,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:46:58,447 INFO L87 Difference]: Start difference. First operand 163 states and 394 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:58,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:58,787 INFO L93 Difference]: Finished difference Result 180 states and 422 transitions. [2021-07-13 19:46:58,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:46:58,787 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:46:58,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:58,788 INFO L225 Difference]: With dead ends: 180 [2021-07-13 19:46:58,788 INFO L226 Difference]: Without dead ends: 173 [2021-07-13 19:46:58,788 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 578.6ms TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:46:58,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-07-13 19:46:58,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 166. [2021-07-13 19:46:58,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.4242424242424243) internal successors, (400), 165 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:58,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 400 transitions. [2021-07-13 19:46:58,790 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 400 transitions. Word has length 18 [2021-07-13 19:46:58,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:58,790 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 400 transitions. [2021-07-13 19:46:58,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:58,790 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 400 transitions. [2021-07-13 19:46:58,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:46:58,790 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:58,790 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:58,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6453 [2021-07-13 19:46:58,991 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:58,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:58,991 INFO L82 PathProgramCache]: Analyzing trace with hash -547954986, now seen corresponding path program 305 times [2021-07-13 19:46:58,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:58,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524041505] [2021-07-13 19:46:58,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:58,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:59,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:59,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524041505] [2021-07-13 19:46:59,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524041505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:59,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963185853] [2021-07-13 19:46:59,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:59,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:46:59,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:59,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:46:59,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:59,744 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:59,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963185853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:59,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:59,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-13 19:46:59,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102753525] [2021-07-13 19:46:59,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:46:59,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:59,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:46:59,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:46:59,745 INFO L87 Difference]: Start difference. First operand 166 states and 400 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:00,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:00,294 INFO L93 Difference]: Finished difference Result 292 states and 615 transitions. [2021-07-13 19:47:00,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:47:00,294 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:00,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:00,295 INFO L225 Difference]: With dead ends: 292 [2021-07-13 19:47:00,295 INFO L226 Difference]: Without dead ends: 285 [2021-07-13 19:47:00,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 650.5ms TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:47:00,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-07-13 19:47:00,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 172. [2021-07-13 19:47:00,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.461988304093567) internal successors, (421), 171 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:00,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 421 transitions. [2021-07-13 19:47:00,297 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 421 transitions. Word has length 18 [2021-07-13 19:47:00,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:00,297 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 421 transitions. [2021-07-13 19:47:00,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:00,297 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 421 transitions. [2021-07-13 19:47:00,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:00,298 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:00,298 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:00,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6525,309 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:00,498 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:00,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:00,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1143629650, now seen corresponding path program 306 times [2021-07-13 19:47:00,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:00,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933527039] [2021-07-13 19:47:00,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:00,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:00,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:00,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:00,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933527039] [2021-07-13 19:47:00,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933527039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:00,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076210687] [2021-07-13 19:47:00,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:00,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:47:00,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:00,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:00,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:01,420 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:01,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076210687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:01,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:01,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-13 19:47:01,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955222702] [2021-07-13 19:47:01,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:47:01,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:01,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:47:01,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:47:01,421 INFO L87 Difference]: Start difference. First operand 172 states and 421 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:02,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:02,004 INFO L93 Difference]: Finished difference Result 296 states and 620 transitions. [2021-07-13 19:47:02,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:47:02,004 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:02,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:02,004 INFO L225 Difference]: With dead ends: 296 [2021-07-13 19:47:02,004 INFO L226 Difference]: Without dead ends: 289 [2021-07-13 19:47:02,005 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 641.4ms TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:47:02,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-07-13 19:47:02,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 171. [2021-07-13 19:47:02,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.4529411764705884) internal successors, (417), 170 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:02,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 417 transitions. [2021-07-13 19:47:02,007 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 417 transitions. Word has length 18 [2021-07-13 19:47:02,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:02,007 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 417 transitions. [2021-07-13 19:47:02,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:02,007 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 417 transitions. [2021-07-13 19:47:02,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:02,007 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:02,007 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:02,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6691 [2021-07-13 19:47:02,208 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:02,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:02,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1316877342, now seen corresponding path program 307 times [2021-07-13 19:47:02,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:02,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664127757] [2021-07-13 19:47:02,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:02,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:02,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:02,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:02,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664127757] [2021-07-13 19:47:02,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664127757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:02,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234458319] [2021-07-13 19:47:02,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:02,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:02,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:02,781 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:02,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234458319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:02,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:02,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:47:02,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694923200] [2021-07-13 19:47:02,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:47:02,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:02,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:47:02,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:47:02,782 INFO L87 Difference]: Start difference. First operand 171 states and 417 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:03,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:03,620 INFO L93 Difference]: Finished difference Result 284 states and 596 transitions. [2021-07-13 19:47:03,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:47:03,621 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:03,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:03,621 INFO L225 Difference]: With dead ends: 284 [2021-07-13 19:47:03,621 INFO L226 Difference]: Without dead ends: 270 [2021-07-13 19:47:03,621 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 882.1ms TimeCoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:47:03,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-07-13 19:47:03,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 164. [2021-07-13 19:47:03,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.4355828220858897) internal successors, (397), 163 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:03,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 397 transitions. [2021-07-13 19:47:03,623 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 397 transitions. Word has length 18 [2021-07-13 19:47:03,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:03,623 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 397 transitions. [2021-07-13 19:47:03,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:03,624 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 397 transitions. [2021-07-13 19:47:03,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:03,624 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:03,624 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:03,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6916,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:03,824 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:03,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:03,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1902378798, now seen corresponding path program 308 times [2021-07-13 19:47:03,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:03,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161378899] [2021-07-13 19:47:03,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:03,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:03,970 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:03,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:03,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161378899] [2021-07-13 19:47:03,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161378899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:03,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131220917] [2021-07-13 19:47:03,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:03,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:47:03,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:03,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:03,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:04,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:04,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131220917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:04,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:04,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:47:04,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575941085] [2021-07-13 19:47:04,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:47:04,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:04,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:47:04,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:47:04,356 INFO L87 Difference]: Start difference. First operand 164 states and 397 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:04,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:04,782 INFO L93 Difference]: Finished difference Result 245 states and 524 transitions. [2021-07-13 19:47:04,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:47:04,782 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:04,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:04,782 INFO L225 Difference]: With dead ends: 245 [2021-07-13 19:47:04,782 INFO L226 Difference]: Without dead ends: 238 [2021-07-13 19:47:04,783 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 475.7ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:47:04,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-07-13 19:47:04,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 168. [2021-07-13 19:47:04,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.4251497005988023) internal successors, (405), 167 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:04,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 405 transitions. [2021-07-13 19:47:04,785 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 405 transitions. Word has length 18 [2021-07-13 19:47:04,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:04,785 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 405 transitions. [2021-07-13 19:47:04,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:04,785 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 405 transitions. [2021-07-13 19:47:04,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:04,785 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:04,785 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:04,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6988 [2021-07-13 19:47:04,986 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:04,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:04,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1686916964, now seen corresponding path program 309 times [2021-07-13 19:47:04,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:04,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669985247] [2021-07-13 19:47:04,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:04,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:05,147 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:05,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:05,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669985247] [2021-07-13 19:47:05,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669985247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:05,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864438898] [2021-07-13 19:47:05,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:05,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:47:05,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:05,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:05,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:05,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:05,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864438898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:05,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:05,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-13 19:47:05,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203097486] [2021-07-13 19:47:05,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:47:05,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:05,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:47:05,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:47:05,567 INFO L87 Difference]: Start difference. First operand 168 states and 405 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:05,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:06,000 INFO L93 Difference]: Finished difference Result 328 states and 704 transitions. [2021-07-13 19:47:06,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:47:06,000 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:06,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:06,000 INFO L225 Difference]: With dead ends: 328 [2021-07-13 19:47:06,000 INFO L226 Difference]: Without dead ends: 321 [2021-07-13 19:47:06,001 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 557.7ms TimeCoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:47:06,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-07-13 19:47:06,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 189. [2021-07-13 19:47:06,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.515957446808511) internal successors, (473), 188 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:06,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 473 transitions. [2021-07-13 19:47:06,003 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 473 transitions. Word has length 18 [2021-07-13 19:47:06,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:06,003 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 473 transitions. [2021-07-13 19:47:06,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:06,003 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 473 transitions. [2021-07-13 19:47:06,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:06,003 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:06,003 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:06,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7064 [2021-07-13 19:47:06,204 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:06,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:06,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1471946328, now seen corresponding path program 310 times [2021-07-13 19:47:06,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:06,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149590318] [2021-07-13 19:47:06,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:06,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:06,420 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:06,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:06,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149590318] [2021-07-13 19:47:06,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149590318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:06,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205891044] [2021-07-13 19:47:06,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:06,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:47:06,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:06,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:06,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:06,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:06,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205891044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:06,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:06,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:47:06,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862420680] [2021-07-13 19:47:06,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:47:06,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:06,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:47:06,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:47:06,878 INFO L87 Difference]: Start difference. First operand 189 states and 473 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:07,336 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2021-07-13 19:47:07,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:07,821 INFO L93 Difference]: Finished difference Result 385 states and 804 transitions. [2021-07-13 19:47:07,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:47:07,822 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:07,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:07,822 INFO L225 Difference]: With dead ends: 385 [2021-07-13 19:47:07,822 INFO L226 Difference]: Without dead ends: 371 [2021-07-13 19:47:07,823 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1019.7ms TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:47:07,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-07-13 19:47:07,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 192. [2021-07-13 19:47:07,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.5287958115183247) internal successors, (483), 191 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:07,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 483 transitions. [2021-07-13 19:47:07,825 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 483 transitions. Word has length 18 [2021-07-13 19:47:07,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:07,825 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 483 transitions. [2021-07-13 19:47:07,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:07,825 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 483 transitions. [2021-07-13 19:47:07,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:07,826 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:07,826 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:08,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7098 [2021-07-13 19:47:08,027 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:08,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:08,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1712392476, now seen corresponding path program 311 times [2021-07-13 19:47:08,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:08,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734159182] [2021-07-13 19:47:08,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:08,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:08,326 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:08,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:08,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734159182] [2021-07-13 19:47:08,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734159182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:08,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354736511] [2021-07-13 19:47:08,327 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:08,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:47:08,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:08,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:08,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:08,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:08,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354736511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:08,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:08,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-13 19:47:08,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602324016] [2021-07-13 19:47:08,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:47:08,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:08,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:47:08,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:47:08,777 INFO L87 Difference]: Start difference. First operand 192 states and 483 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:09,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:09,873 INFO L93 Difference]: Finished difference Result 371 states and 780 transitions. [2021-07-13 19:47:09,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:47:09,873 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:09,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:09,873 INFO L225 Difference]: With dead ends: 371 [2021-07-13 19:47:09,873 INFO L226 Difference]: Without dead ends: 357 [2021-07-13 19:47:09,874 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1210.7ms TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:47:09,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-07-13 19:47:09,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 194. [2021-07-13 19:47:09,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.538860103626943) internal successors, (490), 193 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:09,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 490 transitions. [2021-07-13 19:47:09,876 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 490 transitions. Word has length 18 [2021-07-13 19:47:09,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:09,876 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 490 transitions. [2021-07-13 19:47:09,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:09,876 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 490 transitions. [2021-07-13 19:47:09,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:09,877 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:09,877 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:10,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7132,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:10,077 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:10,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:10,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1882081832, now seen corresponding path program 312 times [2021-07-13 19:47:10,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:10,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157069858] [2021-07-13 19:47:10,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:10,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:10,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:10,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:10,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157069858] [2021-07-13 19:47:10,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157069858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:10,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680479278] [2021-07-13 19:47:10,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:10,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:47:10,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:10,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:10,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:10,845 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:10,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680479278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:10,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:10,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:47:10,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984281100] [2021-07-13 19:47:10,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:47:10,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:10,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:47:10,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:47:10,846 INFO L87 Difference]: Start difference. First operand 194 states and 490 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:11,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:11,729 INFO L93 Difference]: Finished difference Result 328 states and 729 transitions. [2021-07-13 19:47:11,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:47:11,729 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:11,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:11,730 INFO L225 Difference]: With dead ends: 328 [2021-07-13 19:47:11,730 INFO L226 Difference]: Without dead ends: 321 [2021-07-13 19:47:11,730 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1012.9ms TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:47:11,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-07-13 19:47:11,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 205. [2021-07-13 19:47:11,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.5980392156862746) internal successors, (530), 204 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:11,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 530 transitions. [2021-07-13 19:47:11,732 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 530 transitions. Word has length 18 [2021-07-13 19:47:11,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:11,733 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 530 transitions. [2021-07-13 19:47:11,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:11,733 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 530 transitions. [2021-07-13 19:47:11,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:11,733 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:11,733 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:11,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7166,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:11,934 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:11,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:11,934 INFO L82 PathProgramCache]: Analyzing trace with hash -721300828, now seen corresponding path program 313 times [2021-07-13 19:47:11,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:11,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969026791] [2021-07-13 19:47:11,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:12,083 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:12,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:12,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969026791] [2021-07-13 19:47:12,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969026791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:12,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496923856] [2021-07-13 19:47:12,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:12,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:12,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:12,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:12,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:12,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496923856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:12,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:12,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:47:12,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109626521] [2021-07-13 19:47:12,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:47:12,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:12,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:47:12,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:47:12,448 INFO L87 Difference]: Start difference. First operand 205 states and 530 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:13,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:13,067 INFO L93 Difference]: Finished difference Result 355 states and 772 transitions. [2021-07-13 19:47:13,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:47:13,067 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:13,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:13,067 INFO L225 Difference]: With dead ends: 355 [2021-07-13 19:47:13,067 INFO L226 Difference]: Without dead ends: 341 [2021-07-13 19:47:13,068 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 643.5ms TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:47:13,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-07-13 19:47:13,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 195. [2021-07-13 19:47:13,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.556701030927835) internal successors, (496), 194 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:13,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 496 transitions. [2021-07-13 19:47:13,070 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 496 transitions. Word has length 18 [2021-07-13 19:47:13,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:13,070 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 496 transitions. [2021-07-13 19:47:13,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:13,070 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 496 transitions. [2021-07-13 19:47:13,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:13,071 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:13,071 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:13,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7218,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:13,271 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:13,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:13,272 INFO L82 PathProgramCache]: Analyzing trace with hash 690050046, now seen corresponding path program 314 times [2021-07-13 19:47:13,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:13,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709153592] [2021-07-13 19:47:13,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:13,401 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:13,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:13,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709153592] [2021-07-13 19:47:13,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709153592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:13,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501370793] [2021-07-13 19:47:13,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:13,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:47:13,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:13,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:13,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:13,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:13,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501370793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:13,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:13,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 19:47:13,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002445336] [2021-07-13 19:47:13,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:47:13,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:13,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:47:13,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:47:13,793 INFO L87 Difference]: Start difference. First operand 195 states and 496 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:14,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:14,253 INFO L93 Difference]: Finished difference Result 308 states and 701 transitions. [2021-07-13 19:47:14,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:47:14,253 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:14,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:14,253 INFO L225 Difference]: With dead ends: 308 [2021-07-13 19:47:14,253 INFO L226 Difference]: Without dead ends: 301 [2021-07-13 19:47:14,254 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 481.7ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:47:14,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-07-13 19:47:14,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 205. [2021-07-13 19:47:14,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.588235294117647) internal successors, (528), 204 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:14,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 528 transitions. [2021-07-13 19:47:14,257 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 528 transitions. Word has length 18 [2021-07-13 19:47:14,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:14,257 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 528 transitions. [2021-07-13 19:47:14,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:14,257 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 528 transitions. [2021-07-13 19:47:14,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:14,258 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:14,258 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:14,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7253,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:14,473 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:14,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:14,473 INFO L82 PathProgramCache]: Analyzing trace with hash 449603898, now seen corresponding path program 315 times [2021-07-13 19:47:14,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:14,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391182594] [2021-07-13 19:47:14,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:14,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:14,599 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:14,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:14,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391182594] [2021-07-13 19:47:14,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391182594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:14,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85904641] [2021-07-13 19:47:14,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:14,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:47:14,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:14,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:14,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:14,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:14,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85904641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:14,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:14,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 19:47:14,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20823554] [2021-07-13 19:47:14,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:47:14,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:14,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:47:14,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:47:14,969 INFO L87 Difference]: Start difference. First operand 205 states and 528 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:15,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:15,586 INFO L93 Difference]: Finished difference Result 329 states and 740 transitions. [2021-07-13 19:47:15,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:47:15,587 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:15,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:15,587 INFO L225 Difference]: With dead ends: 329 [2021-07-13 19:47:15,587 INFO L226 Difference]: Without dead ends: 322 [2021-07-13 19:47:15,588 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 621.5ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:47:15,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-07-13 19:47:15,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 207. [2021-07-13 19:47:15,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.5970873786407767) internal successors, (535), 206 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:15,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 535 transitions. [2021-07-13 19:47:15,590 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 535 transitions. Word has length 18 [2021-07-13 19:47:15,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:15,590 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 535 transitions. [2021-07-13 19:47:15,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:15,590 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 535 transitions. [2021-07-13 19:47:15,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:15,591 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:15,591 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:15,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7300 [2021-07-13 19:47:15,791 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:15,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:15,792 INFO L82 PathProgramCache]: Analyzing trace with hash -250889090, now seen corresponding path program 316 times [2021-07-13 19:47:15,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:15,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745968811] [2021-07-13 19:47:15,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:15,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:16,107 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:16,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:16,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745968811] [2021-07-13 19:47:16,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745968811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:16,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153196097] [2021-07-13 19:47:16,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:16,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:47:16,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:16,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:16,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:16,473 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:16,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153196097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:16,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:16,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 19:47:16,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562175330] [2021-07-13 19:47:16,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:47:16,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:16,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:47:16,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:47:16,474 INFO L87 Difference]: Start difference. First operand 207 states and 535 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:17,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:17,456 INFO L93 Difference]: Finished difference Result 358 states and 789 transitions. [2021-07-13 19:47:17,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:47:17,457 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:17,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:17,457 INFO L225 Difference]: With dead ends: 358 [2021-07-13 19:47:17,457 INFO L226 Difference]: Without dead ends: 344 [2021-07-13 19:47:17,457 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1100.6ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:47:17,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-07-13 19:47:17,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 208. [2021-07-13 19:47:17,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.603864734299517) internal successors, (539), 207 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:17,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 539 transitions. [2021-07-13 19:47:17,460 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 539 transitions. Word has length 18 [2021-07-13 19:47:17,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:17,460 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 539 transitions. [2021-07-13 19:47:17,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:17,460 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 539 transitions. [2021-07-13 19:47:17,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:17,461 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:17,461 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:17,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7334 [2021-07-13 19:47:17,661 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:17,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:17,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1440695546, now seen corresponding path program 317 times [2021-07-13 19:47:17,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:17,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690362617] [2021-07-13 19:47:17,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:17,794 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:17,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:17,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690362617] [2021-07-13 19:47:17,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690362617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:17,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919540622] [2021-07-13 19:47:17,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:17,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:47:17,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:17,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:17,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:18,171 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:18,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919540622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:18,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:18,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 19:47:18,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889398223] [2021-07-13 19:47:18,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:47:18,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:18,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:47:18,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:47:18,172 INFO L87 Difference]: Start difference. First operand 208 states and 539 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:18,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:18,840 INFO L93 Difference]: Finished difference Result 315 states and 721 transitions. [2021-07-13 19:47:18,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:47:18,841 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:18,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:18,841 INFO L225 Difference]: With dead ends: 315 [2021-07-13 19:47:18,841 INFO L226 Difference]: Without dead ends: 308 [2021-07-13 19:47:18,841 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 692.0ms TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:47:18,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-07-13 19:47:18,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 202. [2021-07-13 19:47:18,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.5771144278606966) internal successors, (518), 201 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:18,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 518 transitions. [2021-07-13 19:47:18,844 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 518 transitions. Word has length 18 [2021-07-13 19:47:18,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:18,844 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 518 transitions. [2021-07-13 19:47:18,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:18,844 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 518 transitions. [2021-07-13 19:47:18,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:18,844 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:18,844 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:19,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7372,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:19,045 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:19,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:19,045 INFO L82 PathProgramCache]: Analyzing trace with hash -34843612, now seen corresponding path program 318 times [2021-07-13 19:47:19,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:19,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194287612] [2021-07-13 19:47:19,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:19,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:19,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:19,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194287612] [2021-07-13 19:47:19,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194287612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:19,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194907739] [2021-07-13 19:47:19,147 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:19,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:47:19,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:19,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:19,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:19,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:19,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194907739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:19,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:19,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-07-13 19:47:19,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746849933] [2021-07-13 19:47:19,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:47:19,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:19,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:47:19,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:47:19,496 INFO L87 Difference]: Start difference. First operand 202 states and 518 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:19,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:19,856 INFO L93 Difference]: Finished difference Result 327 states and 765 transitions. [2021-07-13 19:47:19,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:47:19,856 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:19,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:19,857 INFO L225 Difference]: With dead ends: 327 [2021-07-13 19:47:19,857 INFO L226 Difference]: Without dead ends: 320 [2021-07-13 19:47:19,857 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 404.3ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:47:19,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-07-13 19:47:19,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 224. [2021-07-13 19:47:19,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.6367713004484306) internal successors, (588), 223 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:19,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 588 transitions. [2021-07-13 19:47:19,860 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 588 transitions. Word has length 18 [2021-07-13 19:47:19,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:19,860 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 588 transitions. [2021-07-13 19:47:19,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:19,860 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 588 transitions. [2021-07-13 19:47:19,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:19,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:19,861 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:20,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7406 [2021-07-13 19:47:20,061 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:20,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:20,061 INFO L82 PathProgramCache]: Analyzing trace with hash -735336600, now seen corresponding path program 319 times [2021-07-13 19:47:20,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:20,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43100418] [2021-07-13 19:47:20,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:20,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:20,184 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:20,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:20,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43100418] [2021-07-13 19:47:20,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43100418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:20,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641922272] [2021-07-13 19:47:20,185 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:20,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:20,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:20,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:20,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:20,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641922272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:20,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:20,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-07-13 19:47:20,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709549344] [2021-07-13 19:47:20,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:47:20,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:20,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:47:20,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:47:20,497 INFO L87 Difference]: Start difference. First operand 224 states and 588 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:20,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:20,786 INFO L93 Difference]: Finished difference Result 343 states and 790 transitions. [2021-07-13 19:47:20,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:47:20,786 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:20,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:20,787 INFO L225 Difference]: With dead ends: 343 [2021-07-13 19:47:20,787 INFO L226 Difference]: Without dead ends: 336 [2021-07-13 19:47:20,787 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 334.0ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:47:20,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-07-13 19:47:20,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 225. [2021-07-13 19:47:20,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.642857142857143) internal successors, (592), 224 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:20,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 592 transitions. [2021-07-13 19:47:20,790 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 592 transitions. Word has length 18 [2021-07-13 19:47:20,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:20,790 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 592 transitions. [2021-07-13 19:47:20,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:20,790 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 592 transitions. [2021-07-13 19:47:20,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:20,790 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:20,790 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:20,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7441,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:20,991 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:20,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:20,991 INFO L82 PathProgramCache]: Analyzing trace with hash 956248036, now seen corresponding path program 320 times [2021-07-13 19:47:20,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:20,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553125245] [2021-07-13 19:47:20,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:20,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:21,101 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:21,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:21,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553125245] [2021-07-13 19:47:21,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553125245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:21,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223451963] [2021-07-13 19:47:21,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:21,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:47:21,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:21,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:21,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:21,379 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:21,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223451963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:21,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:21,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-07-13 19:47:21,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084629302] [2021-07-13 19:47:21,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:47:21,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:21,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:47:21,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:47:21,380 INFO L87 Difference]: Start difference. First operand 225 states and 592 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:21,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:21,672 INFO L93 Difference]: Finished difference Result 328 states and 767 transitions. [2021-07-13 19:47:21,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:47:21,672 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:21,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:21,673 INFO L225 Difference]: With dead ends: 328 [2021-07-13 19:47:21,673 INFO L226 Difference]: Without dead ends: 321 [2021-07-13 19:47:21,673 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 319.4ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:47:21,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-07-13 19:47:21,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 222. [2021-07-13 19:47:21,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.6289592760180995) internal successors, (581), 221 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:21,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 581 transitions. [2021-07-13 19:47:21,676 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 581 transitions. Word has length 18 [2021-07-13 19:47:21,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:21,676 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 581 transitions. [2021-07-13 19:47:21,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:21,676 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 581 transitions. [2021-07-13 19:47:21,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:21,676 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:21,676 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:21,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7488 [2021-07-13 19:47:21,877 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:21,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:21,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1270566402, now seen corresponding path program 321 times [2021-07-13 19:47:21,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:21,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110225544] [2021-07-13 19:47:21,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:21,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:22,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:47:22,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:22,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110225544] [2021-07-13 19:47:22,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110225544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:22,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715676920] [2021-07-13 19:47:22,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:22,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:47:22,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:22,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:22,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:22,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715676920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:22,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:22,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-07-13 19:47:22,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247281077] [2021-07-13 19:47:22,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:47:22,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:22,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:47:22,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:47:22,447 INFO L87 Difference]: Start difference. First operand 222 states and 581 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:22,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:22,831 INFO L93 Difference]: Finished difference Result 336 states and 773 transitions. [2021-07-13 19:47:22,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:47:22,831 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:22,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:22,832 INFO L225 Difference]: With dead ends: 336 [2021-07-13 19:47:22,832 INFO L226 Difference]: Without dead ends: 329 [2021-07-13 19:47:22,832 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 436.5ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:47:22,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-07-13 19:47:22,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 225. [2021-07-13 19:47:22,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.642857142857143) internal successors, (592), 224 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:22,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 592 transitions. [2021-07-13 19:47:22,835 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 592 transitions. Word has length 18 [2021-07-13 19:47:22,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:22,835 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 592 transitions. [2021-07-13 19:47:22,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:22,835 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 592 transitions. [2021-07-13 19:47:22,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:22,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:22,835 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:23,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7522 [2021-07-13 19:47:23,036 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:23,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:23,036 INFO L82 PathProgramCache]: Analyzing trace with hash 421018234, now seen corresponding path program 322 times [2021-07-13 19:47:23,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:23,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674778229] [2021-07-13 19:47:23,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:23,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:23,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:47:23,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:23,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674778229] [2021-07-13 19:47:23,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674778229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:23,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550558967] [2021-07-13 19:47:23,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:23,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:47:23,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:23,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:23,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:23,594 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:23,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550558967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:23,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:23,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-07-13 19:47:23,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272398105] [2021-07-13 19:47:23,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:47:23,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:23,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:47:23,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:47:23,595 INFO L87 Difference]: Start difference. First operand 225 states and 592 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:24,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:24,031 INFO L93 Difference]: Finished difference Result 337 states and 773 transitions. [2021-07-13 19:47:24,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:47:24,032 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:24,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:24,032 INFO L225 Difference]: With dead ends: 337 [2021-07-13 19:47:24,032 INFO L226 Difference]: Without dead ends: 330 [2021-07-13 19:47:24,033 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 493.0ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:47:24,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-07-13 19:47:24,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 224. [2021-07-13 19:47:24,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.6367713004484306) internal successors, (588), 223 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:24,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 588 transitions. [2021-07-13 19:47:24,035 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 588 transitions. Word has length 18 [2021-07-13 19:47:24,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:24,035 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 588 transitions. [2021-07-13 19:47:24,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:24,035 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 588 transitions. [2021-07-13 19:47:24,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:24,036 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:24,036 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:24,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7641 [2021-07-13 19:47:24,236 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:24,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:24,237 INFO L82 PathProgramCache]: Analyzing trace with hash 594265926, now seen corresponding path program 323 times [2021-07-13 19:47:24,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:24,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091436447] [2021-07-13 19:47:24,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:24,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:24,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:47:24,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:24,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091436447] [2021-07-13 19:47:24,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091436447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:24,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921360873] [2021-07-13 19:47:24,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:24,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:47:24,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:24,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:24,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:24,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:24,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921360873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:24,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:24,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-07-13 19:47:24,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535844898] [2021-07-13 19:47:24,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:47:24,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:24,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:47:24,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:47:24,726 INFO L87 Difference]: Start difference. First operand 224 states and 588 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:25,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:25,126 INFO L93 Difference]: Finished difference Result 320 states and 746 transitions. [2021-07-13 19:47:25,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:47:25,127 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:25,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:25,127 INFO L225 Difference]: With dead ends: 320 [2021-07-13 19:47:25,127 INFO L226 Difference]: Without dead ends: 313 [2021-07-13 19:47:25,127 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 491.0ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:47:25,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-07-13 19:47:25,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 222. [2021-07-13 19:47:25,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.6289592760180995) internal successors, (581), 221 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:25,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 581 transitions. [2021-07-13 19:47:25,130 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 581 transitions. Word has length 18 [2021-07-13 19:47:25,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:25,130 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 581 transitions. [2021-07-13 19:47:25,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:25,130 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 581 transitions. [2021-07-13 19:47:25,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:25,131 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:25,131 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:25,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7758,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:25,331 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:25,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:25,331 INFO L82 PathProgramCache]: Analyzing trace with hash -682821080, now seen corresponding path program 324 times [2021-07-13 19:47:25,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:25,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652050339] [2021-07-13 19:47:25,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:25,539 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:47:25,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:25,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652050339] [2021-07-13 19:47:25,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652050339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:25,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032488276] [2021-07-13 19:47:25,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:25,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:47:25,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:25,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:25,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:26,083 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:26,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032488276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:26,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:26,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-07-13 19:47:26,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899762408] [2021-07-13 19:47:26,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:47:26,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:26,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:47:26,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:47:26,084 INFO L87 Difference]: Start difference. First operand 222 states and 581 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:26,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:26,570 INFO L93 Difference]: Finished difference Result 294 states and 697 transitions. [2021-07-13 19:47:26,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:47:26,570 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:26,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:26,571 INFO L225 Difference]: With dead ends: 294 [2021-07-13 19:47:26,571 INFO L226 Difference]: Without dead ends: 287 [2021-07-13 19:47:26,571 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 598.7ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:47:26,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-07-13 19:47:26,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 222. [2021-07-13 19:47:26,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.6289592760180995) internal successors, (581), 221 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:26,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 581 transitions. [2021-07-13 19:47:26,573 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 581 transitions. Word has length 18 [2021-07-13 19:47:26,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:26,573 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 581 transitions. [2021-07-13 19:47:26,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:26,574 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 581 transitions. [2021-07-13 19:47:26,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:26,574 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:26,574 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:26,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7840,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:26,774 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:26,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:26,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1008763556, now seen corresponding path program 325 times [2021-07-13 19:47:26,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:26,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361674661] [2021-07-13 19:47:26,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:26,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:26,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:47:26,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:26,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361674661] [2021-07-13 19:47:26,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361674661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:26,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501844434] [2021-07-13 19:47:26,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:26,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:26,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:26,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:27,376 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:27,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501844434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:27,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:27,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-07-13 19:47:27,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520439168] [2021-07-13 19:47:27,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:47:27,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:27,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:47:27,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:47:27,377 INFO L87 Difference]: Start difference. First operand 222 states and 581 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:27,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:27,852 INFO L93 Difference]: Finished difference Result 295 states and 697 transitions. [2021-07-13 19:47:27,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:47:27,852 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:27,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:27,853 INFO L225 Difference]: With dead ends: 295 [2021-07-13 19:47:27,853 INFO L226 Difference]: Without dead ends: 288 [2021-07-13 19:47:27,853 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 549.7ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:47:27,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-07-13 19:47:27,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 221. [2021-07-13 19:47:27,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.6227272727272726) internal successors, (577), 220 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:27,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 577 transitions. [2021-07-13 19:47:27,856 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 577 transitions. Word has length 18 [2021-07-13 19:47:27,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:27,856 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 577 transitions. [2021-07-13 19:47:27,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:27,856 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 577 transitions. [2021-07-13 19:47:27,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:27,856 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:27,856 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:28,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8005 [2021-07-13 19:47:28,057 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:28,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:28,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1182011248, now seen corresponding path program 326 times [2021-07-13 19:47:28,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:28,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7227952] [2021-07-13 19:47:28,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:28,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:47:28,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:28,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7227952] [2021-07-13 19:47:28,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7227952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:28,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057100662] [2021-07-13 19:47:28,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:28,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:47:28,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:28,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:47:28,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:28,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:28,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057100662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:28,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:28,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-07-13 19:47:28,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605309087] [2021-07-13 19:47:28,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:47:28,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:28,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:47:28,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:47:28,775 INFO L87 Difference]: Start difference. First operand 221 states and 577 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:29,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:29,490 INFO L93 Difference]: Finished difference Result 320 states and 732 transitions. [2021-07-13 19:47:29,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:47:29,490 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:29,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:29,491 INFO L225 Difference]: With dead ends: 320 [2021-07-13 19:47:29,491 INFO L226 Difference]: Without dead ends: 306 [2021-07-13 19:47:29,491 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 987.1ms TimeCoverageRelationStatistics Valid=132, Invalid=924, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:47:29,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-07-13 19:47:29,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 219. [2021-07-13 19:47:29,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.614678899082569) internal successors, (570), 218 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:29,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 570 transitions. [2021-07-13 19:47:29,494 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 570 transitions. Word has length 18 [2021-07-13 19:47:29,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:29,494 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 570 transitions. [2021-07-13 19:47:29,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:29,494 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 570 transitions. [2021-07-13 19:47:29,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:29,494 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:29,494 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:29,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8123,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:29,695 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:29,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:29,695 INFO L82 PathProgramCache]: Analyzing trace with hash -2037244892, now seen corresponding path program 327 times [2021-07-13 19:47:29,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:29,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841921045] [2021-07-13 19:47:29,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:29,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:29,818 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:47:29,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:29,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841921045] [2021-07-13 19:47:29,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841921045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:29,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861046215] [2021-07-13 19:47:29,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:29,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:47:29,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:29,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:29,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:30,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:30,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861046215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:30,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:30,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 19:47:30,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61997593] [2021-07-13 19:47:30,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:47:30,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:30,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:47:30,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:47:30,212 INFO L87 Difference]: Start difference. First operand 219 states and 570 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:30,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:30,744 INFO L93 Difference]: Finished difference Result 294 states and 689 transitions. [2021-07-13 19:47:30,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:47:30,744 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:30,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:30,745 INFO L225 Difference]: With dead ends: 294 [2021-07-13 19:47:30,745 INFO L226 Difference]: Without dead ends: 287 [2021-07-13 19:47:30,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 571.4ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:47:30,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-07-13 19:47:30,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 216. [2021-07-13 19:47:30,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.604651162790698) internal successors, (560), 215 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:30,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 560 transitions. [2021-07-13 19:47:30,747 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 560 transitions. Word has length 18 [2021-07-13 19:47:30,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:30,748 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 560 transitions. [2021-07-13 19:47:30,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:30,748 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 560 transitions. [2021-07-13 19:47:30,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:30,748 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:30,748 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:30,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8210 [2021-07-13 19:47:30,949 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:30,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:30,949 INFO L82 PathProgramCache]: Analyzing trace with hash 357414718, now seen corresponding path program 328 times [2021-07-13 19:47:30,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:30,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635459762] [2021-07-13 19:47:30,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:30,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:31,101 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:31,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:31,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635459762] [2021-07-13 19:47:31,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635459762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:31,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828933093] [2021-07-13 19:47:31,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:31,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:47:31,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:31,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:31,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:31,634 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:31,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828933093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:31,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:31,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:47:31,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762586305] [2021-07-13 19:47:31,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:47:31,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:31,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:47:31,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:47:31,635 INFO L87 Difference]: Start difference. First operand 216 states and 560 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:32,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:32,106 INFO L93 Difference]: Finished difference Result 342 states and 778 transitions. [2021-07-13 19:47:32,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:47:32,107 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:32,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:32,107 INFO L225 Difference]: With dead ends: 342 [2021-07-13 19:47:32,107 INFO L226 Difference]: Without dead ends: 335 [2021-07-13 19:47:32,107 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 536.4ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:47:32,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-07-13 19:47:32,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 226. [2021-07-13 19:47:32,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.64) internal successors, (594), 225 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:32,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 594 transitions. [2021-07-13 19:47:32,110 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 594 transitions. Word has length 18 [2021-07-13 19:47:32,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:32,110 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 594 transitions. [2021-07-13 19:47:32,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:32,110 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 594 transitions. [2021-07-13 19:47:32,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:32,111 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:32,111 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:32,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8286 [2021-07-13 19:47:32,311 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:32,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:32,312 INFO L82 PathProgramCache]: Analyzing trace with hash 2048999354, now seen corresponding path program 329 times [2021-07-13 19:47:32,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:32,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589250548] [2021-07-13 19:47:32,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:32,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:32,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:32,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:32,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589250548] [2021-07-13 19:47:32,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589250548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:32,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576514575] [2021-07-13 19:47:32,469 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:32,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:47:32,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:32,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:32,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:32,944 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:32,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576514575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:32,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:32,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:47:32,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90804036] [2021-07-13 19:47:32,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:47:32,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:32,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:47:32,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:47:32,945 INFO L87 Difference]: Start difference. First operand 226 states and 594 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:33,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:33,407 INFO L93 Difference]: Finished difference Result 346 states and 783 transitions. [2021-07-13 19:47:33,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:47:33,407 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:33,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:33,408 INFO L225 Difference]: With dead ends: 346 [2021-07-13 19:47:33,408 INFO L226 Difference]: Without dead ends: 339 [2021-07-13 19:47:33,408 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 557.0ms TimeCoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:47:33,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-07-13 19:47:33,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 225. [2021-07-13 19:47:33,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.6339285714285716) internal successors, (590), 224 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:33,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 590 transitions. [2021-07-13 19:47:33,411 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 590 transitions. Word has length 18 [2021-07-13 19:47:33,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:33,411 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 590 transitions. [2021-07-13 19:47:33,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:33,411 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 590 transitions. [2021-07-13 19:47:33,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:33,411 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:33,412 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:33,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8443 [2021-07-13 19:47:33,612 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:33,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:33,613 INFO L82 PathProgramCache]: Analyzing trace with hash -2072720250, now seen corresponding path program 330 times [2021-07-13 19:47:33,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:33,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876189309] [2021-07-13 19:47:33,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:33,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:33,873 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:33,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:33,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876189309] [2021-07-13 19:47:33,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876189309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:33,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239694832] [2021-07-13 19:47:33,873 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:33,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:47:33,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:33,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:33,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:34,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:34,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239694832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:34,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:34,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-13 19:47:34,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579140543] [2021-07-13 19:47:34,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:47:34,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:34,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:47:34,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:47:34,360 INFO L87 Difference]: Start difference. First operand 225 states and 590 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:34,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:34,927 INFO L93 Difference]: Finished difference Result 357 states and 795 transitions. [2021-07-13 19:47:34,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:47:34,927 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:34,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:34,928 INFO L225 Difference]: With dead ends: 357 [2021-07-13 19:47:34,928 INFO L226 Difference]: Without dead ends: 350 [2021-07-13 19:47:34,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 714.6ms TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:47:34,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-07-13 19:47:34,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 223. [2021-07-13 19:47:34,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.626126126126126) internal successors, (583), 222 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:34,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 583 transitions. [2021-07-13 19:47:34,931 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 583 transitions. Word has length 18 [2021-07-13 19:47:34,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:34,931 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 583 transitions. [2021-07-13 19:47:34,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:34,931 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 583 transitions. [2021-07-13 19:47:34,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:34,931 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:34,931 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:35,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8563,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:35,132 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:35,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:35,132 INFO L82 PathProgramCache]: Analyzing trace with hash -997009094, now seen corresponding path program 331 times [2021-07-13 19:47:35,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:35,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242107300] [2021-07-13 19:47:35,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:35,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:35,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:35,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:35,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242107300] [2021-07-13 19:47:35,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242107300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:35,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639394496] [2021-07-13 19:47:35,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:35,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:35,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:35,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:36,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:36,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639394496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:36,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:36,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-13 19:47:36,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756663558] [2021-07-13 19:47:36,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:47:36,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:36,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:47:36,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:47:36,040 INFO L87 Difference]: Start difference. First operand 223 states and 583 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:36,547 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2021-07-13 19:47:36,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:36,723 INFO L93 Difference]: Finished difference Result 242 states and 611 transitions. [2021-07-13 19:47:36,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:47:36,723 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:36,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:36,724 INFO L225 Difference]: With dead ends: 242 [2021-07-13 19:47:36,724 INFO L226 Difference]: Without dead ends: 235 [2021-07-13 19:47:36,724 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1132.9ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:47:36,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-07-13 19:47:36,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 222. [2021-07-13 19:47:36,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.6244343891402715) internal successors, (580), 221 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:36,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 580 transitions. [2021-07-13 19:47:36,726 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 580 transitions. Word has length 18 [2021-07-13 19:47:36,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:36,726 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 580 transitions. [2021-07-13 19:47:36,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:36,726 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 580 transitions. [2021-07-13 19:47:36,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:36,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:36,727 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:36,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8659,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:36,927 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:36,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:36,928 INFO L82 PathProgramCache]: Analyzing trace with hash -2009701626, now seen corresponding path program 332 times [2021-07-13 19:47:36,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:36,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344623440] [2021-07-13 19:47:36,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:36,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:37,128 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:37,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:37,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344623440] [2021-07-13 19:47:37,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344623440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:37,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091286303] [2021-07-13 19:47:37,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:37,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:47:37,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:37,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:37,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:37,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:37,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091286303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:37,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:37,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:47:37,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374539262] [2021-07-13 19:47:37,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:47:37,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:37,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:47:37,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:47:37,556 INFO L87 Difference]: Start difference. First operand 222 states and 580 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:37,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:37,926 INFO L93 Difference]: Finished difference Result 320 states and 730 transitions. [2021-07-13 19:47:37,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:47:37,926 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:37,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:37,927 INFO L225 Difference]: With dead ends: 320 [2021-07-13 19:47:37,927 INFO L226 Difference]: Without dead ends: 313 [2021-07-13 19:47:37,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 530.1ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:47:37,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-07-13 19:47:37,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 230. [2021-07-13 19:47:37,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.593886462882096) internal successors, (594), 229 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:37,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 594 transitions. [2021-07-13 19:47:37,931 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 594 transitions. Word has length 18 [2021-07-13 19:47:37,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:37,931 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 594 transitions. [2021-07-13 19:47:37,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:37,931 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 594 transitions. [2021-07-13 19:47:37,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:37,932 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:37,932 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:38,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8692,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:38,153 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:38,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:38,154 INFO L82 PathProgramCache]: Analyzing trace with hash 923469522, now seen corresponding path program 333 times [2021-07-13 19:47:38,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:38,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461974530] [2021-07-13 19:47:38,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:38,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:38,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:38,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:38,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461974530] [2021-07-13 19:47:38,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461974530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:38,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853548558] [2021-07-13 19:47:38,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:38,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:47:38,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:38,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:38,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:38,751 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:38,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853548558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:38,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:38,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-13 19:47:38,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483252034] [2021-07-13 19:47:38,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:47:38,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:38,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:47:38,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:47:38,752 INFO L87 Difference]: Start difference. First operand 230 states and 594 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:39,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:39,094 INFO L93 Difference]: Finished difference Result 363 states and 828 transitions. [2021-07-13 19:47:39,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:47:39,094 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:39,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:39,095 INFO L225 Difference]: With dead ends: 363 [2021-07-13 19:47:39,095 INFO L226 Difference]: Without dead ends: 356 [2021-07-13 19:47:39,095 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 490.4ms TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:47:39,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-07-13 19:47:39,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 243. [2021-07-13 19:47:39,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.6198347107438016) internal successors, (634), 242 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:39,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 634 transitions. [2021-07-13 19:47:39,101 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 634 transitions. Word has length 18 [2021-07-13 19:47:39,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:39,101 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 634 transitions. [2021-07-13 19:47:39,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:39,101 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 634 transitions. [2021-07-13 19:47:39,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:39,101 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:39,102 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:39,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8764 [2021-07-13 19:47:39,302 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:39,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:39,302 INFO L82 PathProgramCache]: Analyzing trace with hash 2059573526, now seen corresponding path program 334 times [2021-07-13 19:47:39,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:39,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942641030] [2021-07-13 19:47:39,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:39,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:39,517 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:39,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:39,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942641030] [2021-07-13 19:47:39,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942641030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:39,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775560916] [2021-07-13 19:47:39,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:39,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:47:39,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:39,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:39,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:39,955 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:39,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775560916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:39,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:39,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:47:39,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934878972] [2021-07-13 19:47:39,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:47:39,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:39,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:47:39,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:47:39,956 INFO L87 Difference]: Start difference. First operand 243 states and 634 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:40,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:40,784 INFO L93 Difference]: Finished difference Result 411 states and 910 transitions. [2021-07-13 19:47:40,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:47:40,785 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:40,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:40,785 INFO L225 Difference]: With dead ends: 411 [2021-07-13 19:47:40,785 INFO L226 Difference]: Without dead ends: 397 [2021-07-13 19:47:40,786 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 917.5ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:47:40,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-07-13 19:47:40,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 246. [2021-07-13 19:47:40,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.6285714285714286) internal successors, (644), 245 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:40,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 644 transitions. [2021-07-13 19:47:40,789 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 644 transitions. Word has length 18 [2021-07-13 19:47:40,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:40,789 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 644 transitions. [2021-07-13 19:47:40,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:40,789 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 644 transitions. [2021-07-13 19:47:40,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:40,789 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:40,789 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:40,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8836 [2021-07-13 19:47:40,990 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:40,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:40,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1819127378, now seen corresponding path program 335 times [2021-07-13 19:47:40,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:40,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929169864] [2021-07-13 19:47:40,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:40,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:41,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:41,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:41,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929169864] [2021-07-13 19:47:41,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929169864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:41,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752552640] [2021-07-13 19:47:41,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:41,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:47:41,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:41,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:41,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:41,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752552640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:41,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:41,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-13 19:47:41,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352458482] [2021-07-13 19:47:41,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:47:41,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:41,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:47:41,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:47:41,794 INFO L87 Difference]: Start difference. First operand 246 states and 644 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:42,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:42,693 INFO L93 Difference]: Finished difference Result 415 states and 922 transitions. [2021-07-13 19:47:42,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:47:42,693 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:42,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:42,694 INFO L225 Difference]: With dead ends: 415 [2021-07-13 19:47:42,694 INFO L226 Difference]: Without dead ends: 401 [2021-07-13 19:47:42,694 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1083.1ms TimeCoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:47:42,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-07-13 19:47:42,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 248. [2021-07-13 19:47:42,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.6356275303643724) internal successors, (651), 247 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:42,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 651 transitions. [2021-07-13 19:47:42,698 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 651 transitions. Word has length 18 [2021-07-13 19:47:42,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:42,699 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 651 transitions. [2021-07-13 19:47:42,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:42,699 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 651 transitions. [2021-07-13 19:47:42,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:42,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:42,699 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:42,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8912,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:42,921 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:42,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:42,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1118634390, now seen corresponding path program 336 times [2021-07-13 19:47:42,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:42,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714574400] [2021-07-13 19:47:42,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:43,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:43,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714574400] [2021-07-13 19:47:43,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714574400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:43,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265376170] [2021-07-13 19:47:43,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:43,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:47:43,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:43,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:47:43,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:43,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:43,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:43,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-13 19:47:43,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:43,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:43,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:43,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-07-13 19:47:43,666 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:43,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:43,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:43,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-13 19:47:43,672 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:43,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:43,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:43,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-07-13 19:47:43,678 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:43,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:43,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:43,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-07-13 19:47:43,685 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:43,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:43,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:43,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-07-13 19:47:43,691 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:43,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:43,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:43,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:47:43,697 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:43,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:43,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:43,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:47:43,704 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:43,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:43,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:43,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-07-13 19:47:43,712 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:43,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:43,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:43,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-13 19:47:43,720 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:43,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:43,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:43,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-13 19:47:43,726 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:43,731 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:47:43,731 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:43,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:43,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:43,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:47:43,737 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:43,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:43,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:43,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-13 19:47:43,743 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:43,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:43,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:43,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-13 19:47:43,749 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:43,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:43,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:43,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-07-13 19:47:43,755 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:43,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:43,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:43,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-13 19:47:43,762 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:43,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:47:43,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:47:43,767 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-13 19:47:43,899 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 50 [2021-07-13 19:47:43,900 INFO L628 ElimStorePlain]: treesize reduction 404, result has 19.4 percent of original size [2021-07-13 19:47:43,900 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:47:43,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:47:43,902 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 6 variables, input treesize:1057, output treesize:85 [2021-07-13 19:47:44,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:44,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265376170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:44,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:44,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-13 19:47:44,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114142072] [2021-07-13 19:47:44,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:47:44,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:44,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:47:44,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:47:44,064 INFO L87 Difference]: Start difference. First operand 248 states and 651 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:44,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:44,812 INFO L93 Difference]: Finished difference Result 412 states and 942 transitions. [2021-07-13 19:47:44,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:47:44,812 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:44,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:44,813 INFO L225 Difference]: With dead ends: 412 [2021-07-13 19:47:44,813 INFO L226 Difference]: Without dead ends: 398 [2021-07-13 19:47:44,813 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 978.8ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:47:44,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-07-13 19:47:44,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 262. [2021-07-13 19:47:44,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.67816091954023) internal successors, (699), 261 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:44,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 699 transitions. [2021-07-13 19:47:44,820 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 699 transitions. Word has length 18 [2021-07-13 19:47:44,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:44,820 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 699 transitions. [2021-07-13 19:47:44,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:44,820 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 699 transitions. [2021-07-13 19:47:44,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:44,820 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:44,820 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:45,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9024 [2021-07-13 19:47:45,021 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:45,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:45,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1484748270, now seen corresponding path program 337 times [2021-07-13 19:47:45,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:45,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795413557] [2021-07-13 19:47:45,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:45,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:45,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:45,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:45,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795413557] [2021-07-13 19:47:45,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795413557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:45,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180404818] [2021-07-13 19:47:45,171 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:45,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:45,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:45,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:45,710 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:45,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180404818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:45,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:45,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:47:45,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276739007] [2021-07-13 19:47:45,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:47:45,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:45,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:47:45,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:47:45,711 INFO L87 Difference]: Start difference. First operand 262 states and 699 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:46,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:46,331 INFO L93 Difference]: Finished difference Result 411 states and 940 transitions. [2021-07-13 19:47:46,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:47:46,331 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:46,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:46,332 INFO L225 Difference]: With dead ends: 411 [2021-07-13 19:47:46,332 INFO L226 Difference]: Without dead ends: 397 [2021-07-13 19:47:46,332 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 602.7ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:47:46,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-07-13 19:47:46,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 246. [2021-07-13 19:47:46,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.6285714285714286) internal successors, (644), 245 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:46,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 644 transitions. [2021-07-13 19:47:46,335 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 644 transitions. Word has length 18 [2021-07-13 19:47:46,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:46,336 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 644 transitions. [2021-07-13 19:47:46,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:46,336 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 644 transitions. [2021-07-13 19:47:46,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:46,336 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:46,336 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:46,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9040 [2021-07-13 19:47:46,537 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:46,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:46,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1548351786, now seen corresponding path program 338 times [2021-07-13 19:47:46,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:46,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579148940] [2021-07-13 19:47:46,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:46,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:46,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:47:46,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:46,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579148940] [2021-07-13 19:47:46,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579148940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:46,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643835034] [2021-07-13 19:47:46,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:46,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:47:46,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:46,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:47:46,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:47,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:47,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643835034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:47,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:47,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-07-13 19:47:47,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510528905] [2021-07-13 19:47:47,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:47:47,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:47,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:47:47,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:47:47,177 INFO L87 Difference]: Start difference. First operand 246 states and 644 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:47,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:47,744 INFO L93 Difference]: Finished difference Result 359 states and 837 transitions. [2021-07-13 19:47:47,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:47:47,744 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:47,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:47,745 INFO L225 Difference]: With dead ends: 359 [2021-07-13 19:47:47,745 INFO L226 Difference]: Without dead ends: 345 [2021-07-13 19:47:47,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 622.1ms TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:47:47,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-07-13 19:47:47,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 248. [2021-07-13 19:47:47,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.6356275303643724) internal successors, (651), 247 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:47,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 651 transitions. [2021-07-13 19:47:47,748 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 651 transitions. Word has length 18 [2021-07-13 19:47:47,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:47,748 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 651 transitions. [2021-07-13 19:47:47,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:47,748 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 651 transitions. [2021-07-13 19:47:47,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:47,749 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:47,749 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:47,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9193,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:47,949 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:47,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:47,950 INFO L82 PathProgramCache]: Analyzing trace with hash -2083581588, now seen corresponding path program 339 times [2021-07-13 19:47:47,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:47,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431632115] [2021-07-13 19:47:47,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:47,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:48,090 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:48,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:48,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431632115] [2021-07-13 19:47:48,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431632115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:48,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451535053] [2021-07-13 19:47:48,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:48,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:47:48,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:48,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:48,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:48,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:48,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451535053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:48,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:48,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-07-13 19:47:48,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000499311] [2021-07-13 19:47:48,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:47:48,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:48,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:47:48,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:47:48,384 INFO L87 Difference]: Start difference. First operand 248 states and 651 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:48,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:48,631 INFO L93 Difference]: Finished difference Result 353 states and 827 transitions. [2021-07-13 19:47:48,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:47:48,631 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:48,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:48,631 INFO L225 Difference]: With dead ends: 353 [2021-07-13 19:47:48,632 INFO L226 Difference]: Without dead ends: 346 [2021-07-13 19:47:48,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 349.5ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:47:48,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-07-13 19:47:48,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 251. [2021-07-13 19:47:48,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.648) internal successors, (662), 250 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:48,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 662 transitions. [2021-07-13 19:47:48,635 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 662 transitions. Word has length 18 [2021-07-13 19:47:48,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:48,635 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 662 transitions. [2021-07-13 19:47:48,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:48,635 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 662 transitions. [2021-07-13 19:47:48,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:48,635 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:48,635 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:48,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9342 [2021-07-13 19:47:48,836 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:48,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:48,836 INFO L82 PathProgramCache]: Analyzing trace with hash -391996952, now seen corresponding path program 340 times [2021-07-13 19:47:48,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:48,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551099091] [2021-07-13 19:47:48,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:48,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:48,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:48,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:48,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551099091] [2021-07-13 19:47:48,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551099091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:48,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407606863] [2021-07-13 19:47:48,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:48,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:47:48,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:48,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:48,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:49,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:49,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407606863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:49,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:49,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-07-13 19:47:49,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902480930] [2021-07-13 19:47:49,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:47:49,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:49,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:47:49,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:47:49,240 INFO L87 Difference]: Start difference. First operand 251 states and 662 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:49,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:49,533 INFO L93 Difference]: Finished difference Result 355 states and 829 transitions. [2021-07-13 19:47:49,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:47:49,533 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:49,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:49,534 INFO L225 Difference]: With dead ends: 355 [2021-07-13 19:47:49,534 INFO L226 Difference]: Without dead ends: 348 [2021-07-13 19:47:49,534 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 325.3ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:47:49,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-07-13 19:47:49,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 250. [2021-07-13 19:47:49,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.642570281124498) internal successors, (658), 249 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:49,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 658 transitions. [2021-07-13 19:47:49,537 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 658 transitions. Word has length 18 [2021-07-13 19:47:49,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:49,537 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 658 transitions. [2021-07-13 19:47:49,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:49,537 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 658 transitions. [2021-07-13 19:47:49,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:49,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:49,538 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:49,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9377,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:49,738 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:49,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:49,739 INFO L82 PathProgramCache]: Analyzing trace with hash -218749260, now seen corresponding path program 341 times [2021-07-13 19:47:49,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:49,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755202548] [2021-07-13 19:47:49,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:49,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:49,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:49,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:49,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755202548] [2021-07-13 19:47:49,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755202548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:49,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2356695] [2021-07-13 19:47:49,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:49,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:47:49,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:49,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:49,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:50,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:50,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2356695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:50,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:50,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-07-13 19:47:50,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743222100] [2021-07-13 19:47:50,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:47:50,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:50,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:47:50,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:47:50,200 INFO L87 Difference]: Start difference. First operand 250 states and 658 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:50,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:50,551 INFO L93 Difference]: Finished difference Result 338 states and 801 transitions. [2021-07-13 19:47:50,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:47:50,551 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:50,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:50,552 INFO L225 Difference]: With dead ends: 338 [2021-07-13 19:47:50,552 INFO L226 Difference]: Without dead ends: 331 [2021-07-13 19:47:50,552 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 454.4ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:47:50,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-07-13 19:47:50,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 233. [2021-07-13 19:47:50,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.5948275862068964) internal successors, (602), 232 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:50,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 602 transitions. [2021-07-13 19:47:50,555 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 602 transitions. Word has length 18 [2021-07-13 19:47:50,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:50,555 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 602 transitions. [2021-07-13 19:47:50,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:50,555 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 602 transitions. [2021-07-13 19:47:50,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:50,555 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:50,555 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:50,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9411 [2021-07-13 19:47:50,756 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:50,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:50,756 INFO L82 PathProgramCache]: Analyzing trace with hash 46441558, now seen corresponding path program 342 times [2021-07-13 19:47:50,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:50,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415186441] [2021-07-13 19:47:50,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:50,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:50,871 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:47:50,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:50,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415186441] [2021-07-13 19:47:50,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415186441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:50,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917330511] [2021-07-13 19:47:50,871 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:50,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:47:50,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:50,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:50,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:51,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917330511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:51,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:51,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-07-13 19:47:51,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402619045] [2021-07-13 19:47:51,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:47:51,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:51,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:47:51,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:47:51,413 INFO L87 Difference]: Start difference. First operand 233 states and 602 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:51,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:51,887 INFO L93 Difference]: Finished difference Result 324 states and 767 transitions. [2021-07-13 19:47:51,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:47:51,887 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:51,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:51,888 INFO L225 Difference]: With dead ends: 324 [2021-07-13 19:47:51,888 INFO L226 Difference]: Without dead ends: 317 [2021-07-13 19:47:51,888 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 492.1ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:47:51,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-07-13 19:47:51,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 235. [2021-07-13 19:47:51,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.6025641025641026) internal successors, (609), 234 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:51,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 609 transitions. [2021-07-13 19:47:51,891 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 609 transitions. Word has length 18 [2021-07-13 19:47:51,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:51,891 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 609 transitions. [2021-07-13 19:47:51,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:51,891 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 609 transitions. [2021-07-13 19:47:51,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:51,891 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:51,892 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:52,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9445 [2021-07-13 19:47:52,092 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:52,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:52,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1920051630, now seen corresponding path program 343 times [2021-07-13 19:47:52,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:52,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663277020] [2021-07-13 19:47:52,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:52,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:52,197 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:47:52,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:52,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663277020] [2021-07-13 19:47:52,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663277020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:52,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463242580] [2021-07-13 19:47:52,198 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:52,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:52,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:52,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:52,596 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:52,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463242580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:52,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:52,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-07-13 19:47:52,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490205541] [2021-07-13 19:47:52,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:47:52,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:52,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:47:52,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:47:52,597 INFO L87 Difference]: Start difference. First operand 235 states and 609 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:53,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:53,014 INFO L93 Difference]: Finished difference Result 332 states and 792 transitions. [2021-07-13 19:47:53,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:47:53,015 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:53,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:53,015 INFO L225 Difference]: With dead ends: 332 [2021-07-13 19:47:53,015 INFO L226 Difference]: Without dead ends: 325 [2021-07-13 19:47:53,015 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 484.4ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:47:53,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-07-13 19:47:53,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 248. [2021-07-13 19:47:53,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.623481781376518) internal successors, (648), 247 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:53,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 648 transitions. [2021-07-13 19:47:53,018 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 648 transitions. Word has length 18 [2021-07-13 19:47:53,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:53,018 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 648 transitions. [2021-07-13 19:47:53,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:53,018 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 648 transitions. [2021-07-13 19:47:53,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:53,019 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:53,019 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:53,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9616,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:53,220 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:53,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:53,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1674422678, now seen corresponding path program 344 times [2021-07-13 19:47:53,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:53,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597329103] [2021-07-13 19:47:53,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:53,344 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:47:53,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:53,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597329103] [2021-07-13 19:47:53,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597329103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:53,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389830253] [2021-07-13 19:47:53,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:53,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:47:53,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:53,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:47:53,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:53,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:53,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389830253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:53,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:53,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-07-13 19:47:53,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785126101] [2021-07-13 19:47:53,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:47:53,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:53,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:47:53,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:47:53,930 INFO L87 Difference]: Start difference. First operand 248 states and 648 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:54,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:54,626 INFO L93 Difference]: Finished difference Result 369 states and 848 transitions. [2021-07-13 19:47:54,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:47:54,626 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:54,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:54,627 INFO L225 Difference]: With dead ends: 369 [2021-07-13 19:47:54,627 INFO L226 Difference]: Without dead ends: 355 [2021-07-13 19:47:54,627 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 744.7ms TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:47:54,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-07-13 19:47:54,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 249. [2021-07-13 19:47:54,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.629032258064516) internal successors, (652), 248 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:54,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 652 transitions. [2021-07-13 19:47:54,630 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 652 transitions. Word has length 18 [2021-07-13 19:47:54,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:54,630 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 652 transitions. [2021-07-13 19:47:54,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:54,631 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 652 transitions. [2021-07-13 19:47:54,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:54,631 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:54,631 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:54,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 348 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9698 [2021-07-13 19:47:54,831 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:54,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:54,832 INFO L82 PathProgramCache]: Analyzing trace with hash -928959982, now seen corresponding path program 345 times [2021-07-13 19:47:54,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:54,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587514453] [2021-07-13 19:47:54,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:54,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:54,976 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:47:54,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:54,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587514453] [2021-07-13 19:47:54,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587514453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:54,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25750080] [2021-07-13 19:47:54,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:55,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:47:55,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:55,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:55,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:55,425 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:55,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25750080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:55,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:55,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-07-13 19:47:55,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014935713] [2021-07-13 19:47:55,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:47:55,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:55,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:47:55,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:47:55,426 INFO L87 Difference]: Start difference. First operand 249 states and 652 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:55,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:55,881 INFO L93 Difference]: Finished difference Result 329 states and 785 transitions. [2021-07-13 19:47:55,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:47:55,881 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:55,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:55,882 INFO L225 Difference]: With dead ends: 329 [2021-07-13 19:47:55,882 INFO L226 Difference]: Without dead ends: 322 [2021-07-13 19:47:55,882 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 519.8ms TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:47:55,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-07-13 19:47:55,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 248. [2021-07-13 19:47:55,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.623481781376518) internal successors, (648), 247 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:55,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 648 transitions. [2021-07-13 19:47:55,885 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 648 transitions. Word has length 18 [2021-07-13 19:47:55,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:55,885 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 648 transitions. [2021-07-13 19:47:55,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:55,886 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 648 transitions. [2021-07-13 19:47:55,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:55,886 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:55,886 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:56,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9870,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:56,086 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:56,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:56,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1139192876, now seen corresponding path program 346 times [2021-07-13 19:47:56,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:56,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713180294] [2021-07-13 19:47:56,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:56,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:56,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:47:56,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:56,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713180294] [2021-07-13 19:47:56,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713180294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:56,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240789210] [2021-07-13 19:47:56,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:56,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:47:56,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:56,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:56,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:56,523 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:56,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240789210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:56,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:56,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-07-13 19:47:56,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167841484] [2021-07-13 19:47:56,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:47:56,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:56,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:47:56,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:47:56,523 INFO L87 Difference]: Start difference. First operand 248 states and 648 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:56,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:56,935 INFO L93 Difference]: Finished difference Result 326 states and 778 transitions. [2021-07-13 19:47:56,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:47:56,936 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:56,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:56,936 INFO L225 Difference]: With dead ends: 326 [2021-07-13 19:47:56,936 INFO L226 Difference]: Without dead ends: 319 [2021-07-13 19:47:56,936 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 485.0ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:47:56,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-07-13 19:47:56,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 248. [2021-07-13 19:47:56,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.623481781376518) internal successors, (648), 247 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:56,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 648 transitions. [2021-07-13 19:47:56,939 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 648 transitions. Word has length 18 [2021-07-13 19:47:56,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:56,939 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 648 transitions. [2021-07-13 19:47:56,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:56,940 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 648 transitions. [2021-07-13 19:47:56,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:56,940 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:56,940 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:57,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9988 [2021-07-13 19:47:57,141 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:57,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:57,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1464189784, now seen corresponding path program 347 times [2021-07-13 19:47:57,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:57,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210381686] [2021-07-13 19:47:57,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:57,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:57,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:47:57,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:57,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210381686] [2021-07-13 19:47:57,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210381686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:57,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865145105] [2021-07-13 19:47:57,314 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:57,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:47:57,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:57,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:57,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:57,637 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:57,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865145105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:57,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:57,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-07-13 19:47:57,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570198058] [2021-07-13 19:47:57,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:47:57,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:57,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:47:57,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:47:57,638 INFO L87 Difference]: Start difference. First operand 248 states and 648 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:58,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:58,127 INFO L93 Difference]: Finished difference Result 327 states and 778 transitions. [2021-07-13 19:47:58,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:47:58,128 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:58,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:58,128 INFO L225 Difference]: With dead ends: 327 [2021-07-13 19:47:58,128 INFO L226 Difference]: Without dead ends: 320 [2021-07-13 19:47:58,128 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 554.5ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:47:58,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-07-13 19:47:58,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 247. [2021-07-13 19:47:58,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.6178861788617884) internal successors, (644), 246 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:58,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 644 transitions. [2021-07-13 19:47:58,131 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 644 transitions. Word has length 18 [2021-07-13 19:47:58,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:58,131 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 644 transitions. [2021-07-13 19:47:58,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:58,132 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 644 transitions. [2021-07-13 19:47:58,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:58,132 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:58,132 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:58,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10022 [2021-07-13 19:47:58,332 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:58,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:58,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1290942092, now seen corresponding path program 348 times [2021-07-13 19:47:58,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:58,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301834393] [2021-07-13 19:47:58,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:58,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:58,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:47:58,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:58,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301834393] [2021-07-13 19:47:58,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301834393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:58,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178861502] [2021-07-13 19:47:58,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:58,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:47:58,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:58,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:47:58,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:59,018 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:59,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178861502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:59,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:59,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-07-13 19:47:59,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879659573] [2021-07-13 19:47:59,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:47:59,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:59,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:47:59,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:47:59,020 INFO L87 Difference]: Start difference. First operand 247 states and 644 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:59,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:59,600 INFO L93 Difference]: Finished difference Result 317 states and 758 transitions. [2021-07-13 19:47:59,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:47:59,600 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:47:59,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:59,600 INFO L225 Difference]: With dead ends: 317 [2021-07-13 19:47:59,600 INFO L226 Difference]: Without dead ends: 303 [2021-07-13 19:47:59,601 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 669.9ms TimeCoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:47:59,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-07-13 19:47:59,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 245. [2021-07-13 19:47:59,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.610655737704918) internal successors, (637), 244 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:59,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 637 transitions. [2021-07-13 19:47:59,603 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 637 transitions. Word has length 18 [2021-07-13 19:47:59,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:59,603 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 637 transitions. [2021-07-13 19:47:59,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:59,604 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 637 transitions. [2021-07-13 19:47:59,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:47:59,604 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:59,604 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:59,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10057,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:59,804 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:59,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:59,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1726938198, now seen corresponding path program 349 times [2021-07-13 19:47:59,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:59,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079256313] [2021-07-13 19:47:59,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:59,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:59,931 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:59,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:59,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079256313] [2021-07-13 19:47:59,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079256313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:59,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149158832] [2021-07-13 19:47:59,931 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:59,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:59,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:47:59,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:00,246 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:00,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149158832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:00,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:00,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-07-13 19:48:00,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418743707] [2021-07-13 19:48:00,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:48:00,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:00,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:48:00,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:48:00,247 INFO L87 Difference]: Start difference. First operand 245 states and 637 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:00,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:00,701 INFO L93 Difference]: Finished difference Result 364 states and 845 transitions. [2021-07-13 19:48:00,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:48:00,702 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:00,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:00,702 INFO L225 Difference]: With dead ends: 364 [2021-07-13 19:48:00,702 INFO L226 Difference]: Without dead ends: 357 [2021-07-13 19:48:00,703 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 472.0ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:48:00,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-07-13 19:48:00,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 251. [2021-07-13 19:48:00,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.632) internal successors, (658), 250 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:00,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 658 transitions. [2021-07-13 19:48:00,706 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 658 transitions. Word has length 18 [2021-07-13 19:48:00,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:00,706 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 658 transitions. [2021-07-13 19:48:00,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:00,706 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 658 transitions. [2021-07-13 19:48:00,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:00,706 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:00,706 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:00,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10151,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:00,907 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:00,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:00,907 INFO L82 PathProgramCache]: Analyzing trace with hash -876444462, now seen corresponding path program 350 times [2021-07-13 19:48:00,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:00,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953959067] [2021-07-13 19:48:00,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:00,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:01,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:01,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:01,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953959067] [2021-07-13 19:48:01,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953959067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:01,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52609755] [2021-07-13 19:48:01,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:01,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:48:01,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:01,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:48:01,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:01,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:01,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52609755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:01,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:01,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-07-13 19:48:01,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433408662] [2021-07-13 19:48:01,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:48:01,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:01,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:48:01,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:48:01,605 INFO L87 Difference]: Start difference. First operand 251 states and 658 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:02,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:02,383 INFO L93 Difference]: Finished difference Result 392 states and 887 transitions. [2021-07-13 19:48:02,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:48:02,384 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:02,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:02,385 INFO L225 Difference]: With dead ends: 392 [2021-07-13 19:48:02,385 INFO L226 Difference]: Without dead ends: 378 [2021-07-13 19:48:02,385 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 919.5ms TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:48:02,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-07-13 19:48:02,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 250. [2021-07-13 19:48:02,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.6265060240963853) internal successors, (654), 249 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:02,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 654 transitions. [2021-07-13 19:48:02,388 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 654 transitions. Word has length 18 [2021-07-13 19:48:02,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:02,388 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 654 transitions. [2021-07-13 19:48:02,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:02,388 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 654 transitions. [2021-07-13 19:48:02,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:02,388 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:02,389 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:02,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10185,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:02,589 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:02,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:02,589 INFO L82 PathProgramCache]: Analyzing trace with hash -703196770, now seen corresponding path program 351 times [2021-07-13 19:48:02,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:02,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824329110] [2021-07-13 19:48:02,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:02,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:02,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:02,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:02,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824329110] [2021-07-13 19:48:02,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824329110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:02,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665258141] [2021-07-13 19:48:02,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:02,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:48:02,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:02,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:48:02,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:03,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:03,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665258141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:03,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:03,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 19:48:03,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117971423] [2021-07-13 19:48:03,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:48:03,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:03,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:48:03,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:48:03,083 INFO L87 Difference]: Start difference. First operand 250 states and 654 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:03,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:03,629 INFO L93 Difference]: Finished difference Result 360 states and 831 transitions. [2021-07-13 19:48:03,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:48:03,630 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:03,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:03,630 INFO L225 Difference]: With dead ends: 360 [2021-07-13 19:48:03,630 INFO L226 Difference]: Without dead ends: 353 [2021-07-13 19:48:03,631 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 627.2ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:48:03,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-07-13 19:48:03,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 246. [2021-07-13 19:48:03,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.6122448979591835) internal successors, (640), 245 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:03,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 640 transitions. [2021-07-13 19:48:03,633 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 640 transitions. Word has length 18 [2021-07-13 19:48:03,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:03,634 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 640 transitions. [2021-07-13 19:48:03,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:03,634 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 640 transitions. [2021-07-13 19:48:03,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:03,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:03,634 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:03,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10220 [2021-07-13 19:48:03,835 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:03,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:03,835 INFO L82 PathProgramCache]: Analyzing trace with hash 372514386, now seen corresponding path program 352 times [2021-07-13 19:48:03,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:03,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864996212] [2021-07-13 19:48:03,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:03,998 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:03,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:03,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864996212] [2021-07-13 19:48:03,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864996212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:03,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830113653] [2021-07-13 19:48:03,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:04,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:48:04,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:04,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:48:04,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:04,385 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:04,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830113653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:04,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:04,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 19:48:04,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651710787] [2021-07-13 19:48:04,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:48:04,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:04,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:48:04,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:48:04,386 INFO L87 Difference]: Start difference. First operand 246 states and 640 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:04,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:04,834 INFO L93 Difference]: Finished difference Result 336 states and 787 transitions. [2021-07-13 19:48:04,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:48:04,834 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:04,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:04,835 INFO L225 Difference]: With dead ends: 336 [2021-07-13 19:48:04,835 INFO L226 Difference]: Without dead ends: 329 [2021-07-13 19:48:04,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 539.0ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:48:04,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-07-13 19:48:04,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 238. [2021-07-13 19:48:04,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.5949367088607596) internal successors, (615), 237 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:04,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 615 transitions. [2021-07-13 19:48:04,838 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 615 transitions. Word has length 18 [2021-07-13 19:48:04,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:04,838 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 615 transitions. [2021-07-13 19:48:04,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:04,838 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 615 transitions. [2021-07-13 19:48:04,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:04,838 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:04,838 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:05,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 356 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10254 [2021-07-13 19:48:05,039 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:05,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:05,039 INFO L82 PathProgramCache]: Analyzing trace with hash -73397396, now seen corresponding path program 353 times [2021-07-13 19:48:05,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:05,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392598319] [2021-07-13 19:48:05,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:05,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:05,171 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:05,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:05,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392598319] [2021-07-13 19:48:05,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392598319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:05,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202335859] [2021-07-13 19:48:05,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:05,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:48:05,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:05,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:48:05,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:05,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:05,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202335859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:05,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:05,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 19:48:05,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27912737] [2021-07-13 19:48:05,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:48:05,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:05,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:48:05,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:48:05,580 INFO L87 Difference]: Start difference. First operand 238 states and 615 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:05,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:05,973 INFO L93 Difference]: Finished difference Result 356 states and 834 transitions. [2021-07-13 19:48:05,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:48:05,973 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:05,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:05,974 INFO L225 Difference]: With dead ends: 356 [2021-07-13 19:48:05,974 INFO L226 Difference]: Without dead ends: 349 [2021-07-13 19:48:05,974 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 461.9ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:48:05,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-07-13 19:48:05,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 248. [2021-07-13 19:48:05,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.619433198380567) internal successors, (647), 247 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:05,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 647 transitions. [2021-07-13 19:48:05,977 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 647 transitions. Word has length 18 [2021-07-13 19:48:05,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:05,977 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 647 transitions. [2021-07-13 19:48:05,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:05,977 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 647 transitions. [2021-07-13 19:48:05,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:05,977 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:05,977 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:06,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10288 [2021-07-13 19:48:06,178 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:06,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:06,178 INFO L82 PathProgramCache]: Analyzing trace with hash -313843544, now seen corresponding path program 354 times [2021-07-13 19:48:06,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:06,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502542426] [2021-07-13 19:48:06,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:06,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:06,311 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:06,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:06,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502542426] [2021-07-13 19:48:06,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502542426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:06,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323468461] [2021-07-13 19:48:06,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:06,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:48:06,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:06,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:48:06,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:06,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:06,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323468461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:06,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:06,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 19:48:06,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127819079] [2021-07-13 19:48:06,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:48:06,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:06,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:48:06,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:48:06,724 INFO L87 Difference]: Start difference. First operand 248 states and 647 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:07,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:07,350 INFO L93 Difference]: Finished difference Result 372 states and 865 transitions. [2021-07-13 19:48:07,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:48:07,351 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:07,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:07,351 INFO L225 Difference]: With dead ends: 372 [2021-07-13 19:48:07,351 INFO L226 Difference]: Without dead ends: 365 [2021-07-13 19:48:07,352 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 624.3ms TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:48:07,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-07-13 19:48:07,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 250. [2021-07-13 19:48:07,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.6265060240963853) internal successors, (654), 249 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:07,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 654 transitions. [2021-07-13 19:48:07,356 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 654 transitions. Word has length 18 [2021-07-13 19:48:07,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:07,356 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 654 transitions. [2021-07-13 19:48:07,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:07,356 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 654 transitions. [2021-07-13 19:48:07,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:07,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:07,357 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:07,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10370,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:07,573 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:07,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:07,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1014336532, now seen corresponding path program 355 times [2021-07-13 19:48:07,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:07,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977516129] [2021-07-13 19:48:07,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:07,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:07,874 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:07,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:07,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977516129] [2021-07-13 19:48:07,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977516129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:07,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897548358] [2021-07-13 19:48:07,874 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:07,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:07,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:48:07,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:08,418 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:08,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897548358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:08,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:08,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 19:48:08,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856264115] [2021-07-13 19:48:08,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:48:08,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:08,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:48:08,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:48:08,419 INFO L87 Difference]: Start difference. First operand 250 states and 654 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:09,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:09,443 INFO L93 Difference]: Finished difference Result 408 states and 928 transitions. [2021-07-13 19:48:09,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:48:09,443 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:09,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:09,444 INFO L225 Difference]: With dead ends: 408 [2021-07-13 19:48:09,444 INFO L226 Difference]: Without dead ends: 394 [2021-07-13 19:48:09,444 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1139.4ms TimeCoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:48:09,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-07-13 19:48:09,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 251. [2021-07-13 19:48:09,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.632) internal successors, (658), 250 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:09,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 658 transitions. [2021-07-13 19:48:09,447 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 658 transitions. Word has length 18 [2021-07-13 19:48:09,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:09,447 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 658 transitions. [2021-07-13 19:48:09,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:09,448 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 658 transitions. [2021-07-13 19:48:09,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:09,448 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:09,448 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:09,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10452 [2021-07-13 19:48:09,649 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:09,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:09,649 INFO L82 PathProgramCache]: Analyzing trace with hash 677248104, now seen corresponding path program 356 times [2021-07-13 19:48:09,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:09,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180888695] [2021-07-13 19:48:09,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:09,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:09,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:09,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180888695] [2021-07-13 19:48:09,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180888695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:09,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127549854] [2021-07-13 19:48:09,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:09,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:48:09,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:09,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:48:09,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:10,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-07-13 19:48:10,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:10,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-07-13 19:48:10,236 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:10,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:48:10,242 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:10,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-07-13 19:48:10,248 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:10,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-07-13 19:48:10,254 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:10,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-07-13 19:48:10,260 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:10,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-07-13 19:48:10,266 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:10,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-07-13 19:48:10,273 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:10,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-07-13 19:48:10,279 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:10,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:48:10,285 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:10,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-07-13 19:48:10,291 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:10,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-07-13 19:48:10,298 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:10,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-07-13 19:48:10,304 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:10,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-07-13 19:48:10,310 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:10,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-07-13 19:48:10,316 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:10,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:48:10,322 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:10,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-07-13 19:48:10,328 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:10,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-07-13 19:48:10,334 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:10,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-07-13 19:48:10,340 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:10,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-07-13 19:48:10,347 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:10,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-07-13 19:48:10,353 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:10,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-07-13 19:48:10,359 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:10,363 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:48:10,364 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:10,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-07-13 19:48:10,370 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:10,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:48:10,375 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:10,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-07-13 19:48:10,381 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:10,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-07-13 19:48:10,387 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:10,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-07-13 19:48:10,393 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:10,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-07-13 19:48:10,398 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:10,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:48:10,404 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:10,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-07-13 19:48:10,409 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:10,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:48:10,415 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:10,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:48:10,420 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:10,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-07-13 19:48:10,426 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:10,429 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:48:10,430 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:10,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:10,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:48:10,434 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:10,551 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 29 [2021-07-13 19:48:10,552 INFO L628 ElimStorePlain]: treesize reduction 668, result has 10.6 percent of original size [2021-07-13 19:48:10,552 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:48:10,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:48:10,553 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 3 variables, input treesize:2161, output treesize:55 [2021-07-13 19:48:10,718 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:10,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127549854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:10,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:10,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 19:48:10,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130639056] [2021-07-13 19:48:10,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:48:10,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:10,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:48:10,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:48:10,719 INFO L87 Difference]: Start difference. First operand 251 states and 658 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:11,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:11,796 INFO L93 Difference]: Finished difference Result 375 states and 877 transitions. [2021-07-13 19:48:11,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:48:11,796 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:11,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:11,797 INFO L225 Difference]: With dead ends: 375 [2021-07-13 19:48:11,797 INFO L226 Difference]: Without dead ends: 361 [2021-07-13 19:48:11,797 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1091.8ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:48:11,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-07-13 19:48:11,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 230. [2021-07-13 19:48:11,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.593886462882096) internal successors, (594), 229 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:11,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 594 transitions. [2021-07-13 19:48:11,800 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 594 transitions. Word has length 18 [2021-07-13 19:48:11,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:11,800 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 594 transitions. [2021-07-13 19:48:11,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:11,800 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 594 transitions. [2021-07-13 19:48:11,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:11,800 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:11,800 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:12,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10599,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:12,001 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:12,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:12,001 INFO L82 PathProgramCache]: Analyzing trace with hash -798291054, now seen corresponding path program 357 times [2021-07-13 19:48:12,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:12,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742113758] [2021-07-13 19:48:12,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:12,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:12,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:12,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742113758] [2021-07-13 19:48:12,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742113758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:12,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412214643] [2021-07-13 19:48:12,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:12,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:48:12,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:12,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:48:12,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:12,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:12,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:12,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:48:12,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:12,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:12,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:12,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:48:12,615 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:12,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:12,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:12,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-13 19:48:12,620 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:12,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:12,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:12,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-13 19:48:12,625 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:12,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:12,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:12,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:48:12,631 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:12,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:12,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:12,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:48:12,636 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:12,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:12,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:12,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-07-13 19:48:12,641 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:12,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:12,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:12,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-07-13 19:48:12,658 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:12,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:12,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:12,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-07-13 19:48:12,664 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:12,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:12,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:12,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-13 19:48:12,669 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:12,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:12,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:12,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-07-13 19:48:12,674 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:12,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:12,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:12,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-07-13 19:48:12,679 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:12,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:12,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:12,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-07-13 19:48:12,684 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:12,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:12,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:12,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-13 19:48:12,690 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:12,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:12,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:12,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:48:12,695 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:12,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:12,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:12,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-07-13 19:48:12,701 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:12,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:12,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:12,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-07-13 19:48:12,706 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:12,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:12,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-07-13 19:48:12,710 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:12,800 INFO L628 ElimStorePlain]: treesize reduction 384, result has 17.2 percent of original size [2021-07-13 19:48:12,801 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:48:12,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:48:12,802 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 3 variables, input treesize:1003, output treesize:86 [2021-07-13 19:48:12,900 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:12,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412214643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:12,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:12,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-07-13 19:48:12,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493561649] [2021-07-13 19:48:12,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:48:12,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:12,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:48:12,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:48:12,901 INFO L87 Difference]: Start difference. First operand 230 states and 594 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:13,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:13,385 INFO L93 Difference]: Finished difference Result 368 states and 863 transitions. [2021-07-13 19:48:13,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:48:13,386 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:13,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:13,386 INFO L225 Difference]: With dead ends: 368 [2021-07-13 19:48:13,386 INFO L226 Difference]: Without dead ends: 354 [2021-07-13 19:48:13,386 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 503.9ms TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:48:13,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-07-13 19:48:13,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 252. [2021-07-13 19:48:13,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.645418326693227) internal successors, (664), 251 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:13,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 664 transitions. [2021-07-13 19:48:13,389 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 664 transitions. Word has length 18 [2021-07-13 19:48:13,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:13,389 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 664 transitions. [2021-07-13 19:48:13,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:13,390 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 664 transitions. [2021-07-13 19:48:13,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:13,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:13,390 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:13,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10707,361 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:13,590 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:13,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:13,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1498784042, now seen corresponding path program 358 times [2021-07-13 19:48:13,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:13,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120377982] [2021-07-13 19:48:13,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:13,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:13,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:13,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120377982] [2021-07-13 19:48:13,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120377982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:13,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202606379] [2021-07-13 19:48:13,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:13,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:48:13,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:13,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:48:13,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:14,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:14,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202606379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:14,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:14,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-07-13 19:48:14,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000019058] [2021-07-13 19:48:14,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:48:14,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:14,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:48:14,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:48:14,224 INFO L87 Difference]: Start difference. First operand 252 states and 664 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:14,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:14,514 INFO L93 Difference]: Finished difference Result 375 states and 874 transitions. [2021-07-13 19:48:14,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:48:14,514 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:14,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:14,515 INFO L225 Difference]: With dead ends: 375 [2021-07-13 19:48:14,515 INFO L226 Difference]: Without dead ends: 368 [2021-07-13 19:48:14,515 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 310.6ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:48:14,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-07-13 19:48:14,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 253. [2021-07-13 19:48:14,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.6507936507936507) internal successors, (668), 252 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:14,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 668 transitions. [2021-07-13 19:48:14,518 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 668 transitions. Word has length 18 [2021-07-13 19:48:14,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:14,518 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 668 transitions. [2021-07-13 19:48:14,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:14,518 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 668 transitions. [2021-07-13 19:48:14,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:14,518 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:14,518 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:14,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10832,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:14,719 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:14,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:14,719 INFO L82 PathProgramCache]: Analyzing trace with hash 192800594, now seen corresponding path program 359 times [2021-07-13 19:48:14,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:14,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256002400] [2021-07-13 19:48:14,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:14,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:14,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:14,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256002400] [2021-07-13 19:48:14,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256002400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:14,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340592509] [2021-07-13 19:48:14,823 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:14,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:48:14,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:14,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:48:14,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:15,305 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:15,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340592509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:15,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:15,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-07-13 19:48:15,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919239048] [2021-07-13 19:48:15,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:48:15,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:15,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:48:15,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:48:15,306 INFO L87 Difference]: Start difference. First operand 253 states and 668 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:15,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:15,590 INFO L93 Difference]: Finished difference Result 360 states and 851 transitions. [2021-07-13 19:48:15,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:48:15,590 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:15,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:15,591 INFO L225 Difference]: With dead ends: 360 [2021-07-13 19:48:15,591 INFO L226 Difference]: Without dead ends: 353 [2021-07-13 19:48:15,591 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 302.2ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:48:15,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-07-13 19:48:15,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 250. [2021-07-13 19:48:15,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.63855421686747) internal successors, (657), 249 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:15,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 657 transitions. [2021-07-13 19:48:15,594 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 657 transitions. Word has length 18 [2021-07-13 19:48:15,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:15,594 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 657 transitions. [2021-07-13 19:48:15,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:15,594 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 657 transitions. [2021-07-13 19:48:15,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:15,594 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:15,594 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:15,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11004 [2021-07-13 19:48:15,795 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:15,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:15,795 INFO L82 PathProgramCache]: Analyzing trace with hash -2034013844, now seen corresponding path program 360 times [2021-07-13 19:48:15,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:15,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775360628] [2021-07-13 19:48:15,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:15,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:15,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:48:15,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:15,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775360628] [2021-07-13 19:48:15,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775360628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:15,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303085419] [2021-07-13 19:48:15,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:15,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:48:15,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:15,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:48:15,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:16,192 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:16,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303085419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:16,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:16,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-07-13 19:48:16,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815121710] [2021-07-13 19:48:16,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:48:16,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:16,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:48:16,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:48:16,193 INFO L87 Difference]: Start difference. First operand 250 states and 657 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:16,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:16,597 INFO L93 Difference]: Finished difference Result 365 states and 851 transitions. [2021-07-13 19:48:16,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:48:16,598 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:16,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:16,598 INFO L225 Difference]: With dead ends: 365 [2021-07-13 19:48:16,598 INFO L226 Difference]: Without dead ends: 358 [2021-07-13 19:48:16,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 463.4ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:48:16,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-07-13 19:48:16,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 253. [2021-07-13 19:48:16,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.6507936507936507) internal successors, (668), 252 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:16,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 668 transitions. [2021-07-13 19:48:16,601 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 668 transitions. Word has length 18 [2021-07-13 19:48:16,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:16,601 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 668 transitions. [2021-07-13 19:48:16,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:16,602 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 668 transitions. [2021-07-13 19:48:16,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:16,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:16,602 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:16,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11148 [2021-07-13 19:48:16,802 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:16,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:16,803 INFO L82 PathProgramCache]: Analyzing trace with hash -342429208, now seen corresponding path program 361 times [2021-07-13 19:48:16,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:16,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294717559] [2021-07-13 19:48:16,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:16,952 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:48:16,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:16,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294717559] [2021-07-13 19:48:16,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294717559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:16,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789461298] [2021-07-13 19:48:16,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:16,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:16,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:48:16,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:17,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789461298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:17,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:17,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-07-13 19:48:17,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236379437] [2021-07-13 19:48:17,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:48:17,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:17,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:48:17,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:48:17,259 INFO L87 Difference]: Start difference. First operand 253 states and 668 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:17,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:17,721 INFO L93 Difference]: Finished difference Result 366 states and 851 transitions. [2021-07-13 19:48:17,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:48:17,721 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:17,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:17,722 INFO L225 Difference]: With dead ends: 366 [2021-07-13 19:48:17,722 INFO L226 Difference]: Without dead ends: 359 [2021-07-13 19:48:17,722 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 539.1ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:48:17,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-07-13 19:48:17,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 252. [2021-07-13 19:48:17,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.645418326693227) internal successors, (664), 251 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:17,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 664 transitions. [2021-07-13 19:48:17,725 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 664 transitions. Word has length 18 [2021-07-13 19:48:17,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:17,725 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 664 transitions. [2021-07-13 19:48:17,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:17,725 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 664 transitions. [2021-07-13 19:48:17,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:17,726 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:17,726 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:17,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11184,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:17,926 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:17,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:17,927 INFO L82 PathProgramCache]: Analyzing trace with hash -169181516, now seen corresponding path program 362 times [2021-07-13 19:48:17,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:17,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711502315] [2021-07-13 19:48:17,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:18,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:48:18,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:18,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711502315] [2021-07-13 19:48:18,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711502315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:18,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407208884] [2021-07-13 19:48:18,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:18,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:48:18,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:18,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:48:18,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:18,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:18,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:18,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-13 19:48:18,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:18,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:18,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:18,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-13 19:48:18,577 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:18,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:18,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:18,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-13 19:48:18,584 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:18,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:18,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:18,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:48:18,592 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:18,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:18,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:18,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-13 19:48:18,602 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:18,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:18,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-07-13 19:48:18,610 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:18,806 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 65 [2021-07-13 19:48:18,806 INFO L628 ElimStorePlain]: treesize reduction 915, result has 11.9 percent of original size [2021-07-13 19:48:18,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:18,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:48:18,811 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:18,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:48:18,850 INFO L518 ElimStorePlain]: Eliminatee v_prenex_282 vanished before elimination [2021-07-13 19:48:18,850 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:48:18,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:48:18,854 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:18,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:48:18,891 INFO L518 ElimStorePlain]: Eliminatee v_prenex_284 vanished before elimination [2021-07-13 19:48:18,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:48:18,895 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:18,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:48:18,931 INFO L518 ElimStorePlain]: Eliminatee v_prenex_286 vanished before elimination [2021-07-13 19:48:18,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:48:18,933 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1201, output treesize:77 [2021-07-13 19:48:19,031 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:19,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407208884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:19,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:19,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-07-13 19:48:19,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795861659] [2021-07-13 19:48:19,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:48:19,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:19,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:48:19,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:48:19,032 INFO L87 Difference]: Start difference. First operand 252 states and 664 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:19,505 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2021-07-13 19:48:19,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:19,761 INFO L93 Difference]: Finished difference Result 358 states and 837 transitions. [2021-07-13 19:48:19,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:48:19,762 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:19,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:19,762 INFO L225 Difference]: With dead ends: 358 [2021-07-13 19:48:19,762 INFO L226 Difference]: Without dead ends: 344 [2021-07-13 19:48:19,762 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 889.6ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:48:19,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-07-13 19:48:19,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 250. [2021-07-13 19:48:19,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.63855421686747) internal successors, (657), 249 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:19,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 657 transitions. [2021-07-13 19:48:19,765 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 657 transitions. Word has length 18 [2021-07-13 19:48:19,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:19,765 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 657 transitions. [2021-07-13 19:48:19,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:19,766 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 657 transitions. [2021-07-13 19:48:19,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:19,766 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:19,766 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:19,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11221 [2021-07-13 19:48:19,969 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:19,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:19,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1446268522, now seen corresponding path program 363 times [2021-07-13 19:48:19,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:19,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315933134] [2021-07-13 19:48:19,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:20,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:48:20,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:20,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315933134] [2021-07-13 19:48:20,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315933134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:20,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205085820] [2021-07-13 19:48:20,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:20,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:48:20,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:20,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:48:20,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:20,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:20,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205085820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:20,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:20,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-07-13 19:48:20,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875930883] [2021-07-13 19:48:20,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:48:20,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:20,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:48:20,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:48:20,494 INFO L87 Difference]: Start difference. First operand 250 states and 657 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:20,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:20,994 INFO L93 Difference]: Finished difference Result 323 states and 775 transitions. [2021-07-13 19:48:20,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:48:20,995 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:20,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:20,996 INFO L225 Difference]: With dead ends: 323 [2021-07-13 19:48:20,996 INFO L226 Difference]: Without dead ends: 316 [2021-07-13 19:48:20,996 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 645.2ms TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:48:20,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-07-13 19:48:20,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 250. [2021-07-13 19:48:20,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.63855421686747) internal successors, (657), 249 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:21,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 657 transitions. [2021-07-13 19:48:21,000 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 657 transitions. Word has length 18 [2021-07-13 19:48:21,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:21,000 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 657 transitions. [2021-07-13 19:48:21,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:21,000 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 657 transitions. [2021-07-13 19:48:21,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:21,001 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:21,001 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:21,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11268 [2021-07-13 19:48:21,205 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:21,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:21,205 INFO L82 PathProgramCache]: Analyzing trace with hash 245316114, now seen corresponding path program 364 times [2021-07-13 19:48:21,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:21,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810807136] [2021-07-13 19:48:21,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:21,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:21,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:48:21,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:21,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810807136] [2021-07-13 19:48:21,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810807136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:21,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829463690] [2021-07-13 19:48:21,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:21,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:48:21,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:21,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:48:21,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:21,722 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:21,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829463690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:21,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:21,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-07-13 19:48:21,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488962201] [2021-07-13 19:48:21,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:48:21,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:21,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:48:21,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:48:21,723 INFO L87 Difference]: Start difference. First operand 250 states and 657 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:22,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:22,223 INFO L93 Difference]: Finished difference Result 324 states and 775 transitions. [2021-07-13 19:48:22,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:48:22,223 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:22,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:22,224 INFO L225 Difference]: With dead ends: 324 [2021-07-13 19:48:22,224 INFO L226 Difference]: Without dead ends: 317 [2021-07-13 19:48:22,224 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 601.8ms TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:48:22,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-07-13 19:48:22,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 249. [2021-07-13 19:48:22,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.6330645161290325) internal successors, (653), 248 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:22,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 653 transitions. [2021-07-13 19:48:22,227 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 653 transitions. Word has length 18 [2021-07-13 19:48:22,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:22,227 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 653 transitions. [2021-07-13 19:48:22,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:22,227 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 653 transitions. [2021-07-13 19:48:22,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:22,227 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:22,227 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:22,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11303 [2021-07-13 19:48:22,428 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:22,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:22,428 INFO L82 PathProgramCache]: Analyzing trace with hash 418563806, now seen corresponding path program 365 times [2021-07-13 19:48:22,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:22,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358572495] [2021-07-13 19:48:22,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:22,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:22,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:48:22,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:22,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358572495] [2021-07-13 19:48:22,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358572495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:22,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103386643] [2021-07-13 19:48:22,667 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:22,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:48:22,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:22,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:48:22,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:23,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:23,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103386643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:23,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:23,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 19:48:23,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564820188] [2021-07-13 19:48:23,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:48:23,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:23,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:48:23,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:48:23,043 INFO L87 Difference]: Start difference. First operand 249 states and 653 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:23,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:23,764 INFO L93 Difference]: Finished difference Result 340 states and 797 transitions. [2021-07-13 19:48:23,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:48:23,764 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:23,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:23,765 INFO L225 Difference]: With dead ends: 340 [2021-07-13 19:48:23,765 INFO L226 Difference]: Without dead ends: 333 [2021-07-13 19:48:23,765 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 871.6ms TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:48:23,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-07-13 19:48:23,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 247. [2021-07-13 19:48:23,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.6260162601626016) internal successors, (646), 246 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:23,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 646 transitions. [2021-07-13 19:48:23,768 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 646 transitions. Word has length 18 [2021-07-13 19:48:23,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:23,768 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 646 transitions. [2021-07-13 19:48:23,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:23,768 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 646 transitions. [2021-07-13 19:48:23,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:23,768 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:23,768 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:23,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11338,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:23,969 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:23,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:23,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1494274962, now seen corresponding path program 366 times [2021-07-13 19:48:23,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:23,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857351378] [2021-07-13 19:48:23,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:23,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:24,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:48:24,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:24,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857351378] [2021-07-13 19:48:24,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857351378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:24,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187028355] [2021-07-13 19:48:24,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:24,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:48:24,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:24,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:48:24,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:24,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:24,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:24,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-07-13 19:48:24,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:24,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:24,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:24,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-13 19:48:24,674 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:24,680 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:48:24,680 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:24,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:24,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:24,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-13 19:48:24,687 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:24,693 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:48:24,694 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:24,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:24,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:48:24,707 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:24,894 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 63 [2021-07-13 19:48:24,895 INFO L628 ElimStorePlain]: treesize reduction 927, result has 11.8 percent of original size [2021-07-13 19:48:24,895 INFO L518 ElimStorePlain]: Eliminatee v_prenex_306 vanished before elimination [2021-07-13 19:48:24,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:48:24,899 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:24,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:48:24,941 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:48:24,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:48:24,945 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:24,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:48:24,983 INFO L518 ElimStorePlain]: Eliminatee v_prenex_302 vanished before elimination [2021-07-13 19:48:24,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:48:24,987 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:25,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:48:25,023 INFO L518 ElimStorePlain]: Eliminatee v_prenex_304 vanished before elimination [2021-07-13 19:48:25,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:48:25,025 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1201, output treesize:77 [2021-07-13 19:48:25,128 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:25,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187028355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:25,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:25,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 19:48:25,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920243499] [2021-07-13 19:48:25,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:48:25,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:25,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:48:25,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:48:25,128 INFO L87 Difference]: Start difference. First operand 247 states and 646 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:25,565 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 84 [2021-07-13 19:48:25,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:25,907 INFO L93 Difference]: Finished difference Result 332 states and 780 transitions. [2021-07-13 19:48:25,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:48:25,907 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:25,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:25,908 INFO L225 Difference]: With dead ends: 332 [2021-07-13 19:48:25,908 INFO L226 Difference]: Without dead ends: 318 [2021-07-13 19:48:25,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1013.9ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:48:25,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-07-13 19:48:25,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 244. [2021-07-13 19:48:25,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.617283950617284) internal successors, (636), 243 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:25,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 636 transitions. [2021-07-13 19:48:25,911 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 636 transitions. Word has length 18 [2021-07-13 19:48:25,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:25,911 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 636 transitions. [2021-07-13 19:48:25,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:25,911 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 636 transitions. [2021-07-13 19:48:25,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:25,911 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:25,911 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:26,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11375 [2021-07-13 19:48:26,112 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:26,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:26,112 INFO L82 PathProgramCache]: Analyzing trace with hash -406032724, now seen corresponding path program 367 times [2021-07-13 19:48:26,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:26,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129121829] [2021-07-13 19:48:26,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:26,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:26,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:26,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:26,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129121829] [2021-07-13 19:48:26,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129121829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:26,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414263717] [2021-07-13 19:48:26,262 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:26,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:26,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:48:26,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:26,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:26,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414263717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:26,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:26,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:48:26,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416008599] [2021-07-13 19:48:26,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:48:26,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:26,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:48:26,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:48:26,641 INFO L87 Difference]: Start difference. First operand 244 states and 636 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:27,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:27,162 INFO L93 Difference]: Finished difference Result 371 states and 856 transitions. [2021-07-13 19:48:27,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:48:27,162 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:27,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:27,163 INFO L225 Difference]: With dead ends: 371 [2021-07-13 19:48:27,163 INFO L226 Difference]: Without dead ends: 364 [2021-07-13 19:48:27,163 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 588.5ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:48:27,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-07-13 19:48:27,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 254. [2021-07-13 19:48:27,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.6482213438735176) internal successors, (670), 253 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:27,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 670 transitions. [2021-07-13 19:48:27,167 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 670 transitions. Word has length 18 [2021-07-13 19:48:27,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:27,167 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 670 transitions. [2021-07-13 19:48:27,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:27,167 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 670 transitions. [2021-07-13 19:48:27,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:27,168 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:27,168 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:27,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11421 [2021-07-13 19:48:27,381 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:27,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:27,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1285551912, now seen corresponding path program 368 times [2021-07-13 19:48:27,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:27,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033274126] [2021-07-13 19:48:27,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:27,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:27,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:27,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:27,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033274126] [2021-07-13 19:48:27,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033274126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:27,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658531798] [2021-07-13 19:48:27,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:27,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:48:27,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:27,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:48:27,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:27,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:27,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658531798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:27,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:27,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:48:27,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260789561] [2021-07-13 19:48:27,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:48:27,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:27,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:48:27,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:48:27,914 INFO L87 Difference]: Start difference. First operand 254 states and 670 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:28,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:28,525 INFO L93 Difference]: Finished difference Result 375 states and 861 transitions. [2021-07-13 19:48:28,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:48:28,526 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:28,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:28,526 INFO L225 Difference]: With dead ends: 375 [2021-07-13 19:48:28,526 INFO L226 Difference]: Without dead ends: 368 [2021-07-13 19:48:28,527 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 619.4ms TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:48:28,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-07-13 19:48:28,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 253. [2021-07-13 19:48:28,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.642857142857143) internal successors, (666), 252 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:28,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 666 transitions. [2021-07-13 19:48:28,530 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 666 transitions. Word has length 18 [2021-07-13 19:48:28,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:28,530 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 666 transitions. [2021-07-13 19:48:28,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:28,530 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 666 transitions. [2021-07-13 19:48:28,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:28,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:28,530 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:28,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11455 [2021-07-13 19:48:28,731 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:28,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:28,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1458799604, now seen corresponding path program 369 times [2021-07-13 19:48:28,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:28,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972398399] [2021-07-13 19:48:28,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:28,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:28,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:28,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:28,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972398399] [2021-07-13 19:48:28,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972398399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:28,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151962765] [2021-07-13 19:48:28,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:28,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:48:28,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:28,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:48:28,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:29,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:29,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151962765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:29,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:29,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-13 19:48:29,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094749153] [2021-07-13 19:48:29,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:48:29,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:29,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:48:29,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:48:29,364 INFO L87 Difference]: Start difference. First operand 253 states and 666 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:30,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:30,075 INFO L93 Difference]: Finished difference Result 386 states and 873 transitions. [2021-07-13 19:48:30,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:48:30,075 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:30,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:30,076 INFO L225 Difference]: With dead ends: 386 [2021-07-13 19:48:30,076 INFO L226 Difference]: Without dead ends: 379 [2021-07-13 19:48:30,076 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 781.2ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:48:30,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-07-13 19:48:30,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 249. [2021-07-13 19:48:30,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.629032258064516) internal successors, (652), 248 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:30,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 652 transitions. [2021-07-13 19:48:30,079 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 652 transitions. Word has length 18 [2021-07-13 19:48:30,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:30,079 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 652 transitions. [2021-07-13 19:48:30,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:30,079 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 652 transitions. [2021-07-13 19:48:30,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:30,079 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:30,080 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:30,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11490 [2021-07-13 19:48:30,280 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:30,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:30,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1760456536, now seen corresponding path program 370 times [2021-07-13 19:48:30,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:30,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632859541] [2021-07-13 19:48:30,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:30,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:30,719 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:30,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:30,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632859541] [2021-07-13 19:48:30,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632859541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:30,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894468740] [2021-07-13 19:48:30,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:30,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:48:30,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:30,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:48:30,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:31,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:31,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894468740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:31,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:31,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-13 19:48:31,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692299177] [2021-07-13 19:48:31,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:48:31,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:31,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:48:31,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:48:31,205 INFO L87 Difference]: Start difference. First operand 249 states and 652 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:31,733 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2021-07-13 19:48:31,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:31,920 INFO L93 Difference]: Finished difference Result 269 states and 682 transitions. [2021-07-13 19:48:31,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:48:31,920 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:31,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:31,921 INFO L225 Difference]: With dead ends: 269 [2021-07-13 19:48:31,921 INFO L226 Difference]: Without dead ends: 262 [2021-07-13 19:48:31,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1152.6ms TimeCoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:48:31,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-07-13 19:48:31,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 248. [2021-07-13 19:48:31,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.6275303643724697) internal successors, (649), 247 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:31,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 649 transitions. [2021-07-13 19:48:31,925 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 649 transitions. Word has length 18 [2021-07-13 19:48:31,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:31,925 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 649 transitions. [2021-07-13 19:48:31,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:31,925 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 649 transitions. [2021-07-13 19:48:31,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:31,925 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:31,925 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:32,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11525 [2021-07-13 19:48:32,133 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:32,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:32,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1521818228, now seen corresponding path program 371 times [2021-07-13 19:48:32,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:32,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36577109] [2021-07-13 19:48:32,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:32,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:32,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:32,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36577109] [2021-07-13 19:48:32,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36577109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:32,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220472277] [2021-07-13 19:48:32,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:32,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:48:32,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:32,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:48:32,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:32,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:32,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220472277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:32,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:32,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:48:32,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754595086] [2021-07-13 19:48:32,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:48:32,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:32,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:48:32,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:48:32,758 INFO L87 Difference]: Start difference. First operand 248 states and 649 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:33,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:33,258 INFO L93 Difference]: Finished difference Result 347 states and 801 transitions. [2021-07-13 19:48:33,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:48:33,259 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:33,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:33,259 INFO L225 Difference]: With dead ends: 347 [2021-07-13 19:48:33,259 INFO L226 Difference]: Without dead ends: 340 [2021-07-13 19:48:33,259 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 615.2ms TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:48:33,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-07-13 19:48:33,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 227. [2021-07-13 19:48:33,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.601769911504425) internal successors, (588), 226 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:33,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 588 transitions. [2021-07-13 19:48:33,263 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 588 transitions. Word has length 18 [2021-07-13 19:48:33,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:33,263 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 588 transitions. [2021-07-13 19:48:33,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:33,263 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 588 transitions. [2021-07-13 19:48:33,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:33,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:33,263 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:33,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 375 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11573 [2021-07-13 19:48:33,477 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:33,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:33,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1148383108, now seen corresponding path program 372 times [2021-07-13 19:48:33,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:33,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612885909] [2021-07-13 19:48:33,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:33,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:33,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:33,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:33,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612885909] [2021-07-13 19:48:33,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612885909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:33,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385976546] [2021-07-13 19:48:33,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:33,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:48:33,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:33,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:48:33,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:34,046 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:34,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385976546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:34,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:34,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:48:34,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662714406] [2021-07-13 19:48:34,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:48:34,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:34,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:48:34,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:48:34,047 INFO L87 Difference]: Start difference. First operand 227 states and 588 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:34,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:34,481 INFO L93 Difference]: Finished difference Result 398 states and 930 transitions. [2021-07-13 19:48:34,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:48:34,481 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:34,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:34,482 INFO L225 Difference]: With dead ends: 398 [2021-07-13 19:48:34,482 INFO L226 Difference]: Without dead ends: 391 [2021-07-13 19:48:34,482 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 456.4ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:48:34,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-07-13 19:48:34,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 237. [2021-07-13 19:48:34,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.6271186440677967) internal successors, (620), 236 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:34,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 620 transitions. [2021-07-13 19:48:34,485 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 620 transitions. Word has length 18 [2021-07-13 19:48:34,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:34,485 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 620 transitions. [2021-07-13 19:48:34,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:34,485 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 620 transitions. [2021-07-13 19:48:34,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:34,486 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:34,486 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:34,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11607,376 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:34,686 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:34,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:34,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1388829256, now seen corresponding path program 373 times [2021-07-13 19:48:34,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:34,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851897760] [2021-07-13 19:48:34,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:34,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:34,947 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:34,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:34,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851897760] [2021-07-13 19:48:34,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851897760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:34,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448402849] [2021-07-13 19:48:34,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:34,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:34,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:48:34,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:35,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:35,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448402849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:35,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:35,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:48:35,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249889377] [2021-07-13 19:48:35,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:48:35,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:35,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:48:35,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:48:35,376 INFO L87 Difference]: Start difference. First operand 237 states and 620 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:36,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:36,087 INFO L93 Difference]: Finished difference Result 426 states and 984 transitions. [2021-07-13 19:48:36,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:48:36,087 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:36,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:36,088 INFO L225 Difference]: With dead ends: 426 [2021-07-13 19:48:36,088 INFO L226 Difference]: Without dead ends: 412 [2021-07-13 19:48:36,088 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 795.9ms TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:48:36,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-07-13 19:48:36,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 239. [2021-07-13 19:48:36,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.634453781512605) internal successors, (627), 238 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:36,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 627 transitions. [2021-07-13 19:48:36,091 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 627 transitions. Word has length 18 [2021-07-13 19:48:36,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:36,091 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 627 transitions. [2021-07-13 19:48:36,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:36,091 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 627 transitions. [2021-07-13 19:48:36,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:36,091 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:36,092 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:36,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11703,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:36,292 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:36,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:36,292 INFO L82 PathProgramCache]: Analyzing trace with hash -2089322244, now seen corresponding path program 374 times [2021-07-13 19:48:36,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:36,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104227185] [2021-07-13 19:48:36,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:36,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:36,431 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:36,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:36,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104227185] [2021-07-13 19:48:36,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104227185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:36,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505011256] [2021-07-13 19:48:36,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:36,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:48:36,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:36,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:48:36,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:36,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:36,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505011256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:36,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:36,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-13 19:48:36,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808420744] [2021-07-13 19:48:36,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:48:36,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:36,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:48:36,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:48:36,913 INFO L87 Difference]: Start difference. First operand 239 states and 627 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:37,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:37,550 INFO L93 Difference]: Finished difference Result 439 states and 1007 transitions. [2021-07-13 19:48:37,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:48:37,550 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:37,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:37,551 INFO L225 Difference]: With dead ends: 439 [2021-07-13 19:48:37,551 INFO L226 Difference]: Without dead ends: 425 [2021-07-13 19:48:37,551 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 610.6ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:48:37,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-07-13 19:48:37,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 241. [2021-07-13 19:48:37,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.6458333333333335) internal successors, (635), 240 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:37,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 635 transitions. [2021-07-13 19:48:37,554 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 635 transitions. Word has length 18 [2021-07-13 19:48:37,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:37,554 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 635 transitions. [2021-07-13 19:48:37,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:37,554 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 635 transitions. [2021-07-13 19:48:37,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:37,555 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:37,555 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:37,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11793 [2021-07-13 19:48:37,755 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:37,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:37,756 INFO L82 PathProgramCache]: Analyzing trace with hash -397737608, now seen corresponding path program 375 times [2021-07-13 19:48:37,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:37,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188235349] [2021-07-13 19:48:37,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:37,896 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:37,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:37,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188235349] [2021-07-13 19:48:37,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188235349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:37,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566559926] [2021-07-13 19:48:37,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:37,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:48:37,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:37,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:48:37,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:38,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:38,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566559926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:38,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:38,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-13 19:48:38,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685364629] [2021-07-13 19:48:38,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:48:38,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:38,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:48:38,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:48:38,428 INFO L87 Difference]: Start difference. First operand 241 states and 635 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:39,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:39,091 INFO L93 Difference]: Finished difference Result 409 states and 961 transitions. [2021-07-13 19:48:39,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:48:39,091 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:39,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:39,092 INFO L225 Difference]: With dead ends: 409 [2021-07-13 19:48:39,092 INFO L226 Difference]: Without dead ends: 395 [2021-07-13 19:48:39,092 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 630.4ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:48:39,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-07-13 19:48:39,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 235. [2021-07-13 19:48:39,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.623931623931624) internal successors, (614), 234 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:39,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 614 transitions. [2021-07-13 19:48:39,095 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 614 transitions. Word has length 18 [2021-07-13 19:48:39,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:39,095 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 614 transitions. [2021-07-13 19:48:39,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:39,095 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 614 transitions. [2021-07-13 19:48:39,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:39,095 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:39,095 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:39,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11933,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:39,296 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:39,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:39,296 INFO L82 PathProgramCache]: Analyzing trace with hash -2036806724, now seen corresponding path program 376 times [2021-07-13 19:48:39,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:39,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702252058] [2021-07-13 19:48:39,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:39,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:39,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:39,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:39,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702252058] [2021-07-13 19:48:39,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702252058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:39,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787479340] [2021-07-13 19:48:39,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:39,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:48:39,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:39,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:48:39,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:39,784 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:39,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787479340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:39,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:39,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-07-13 19:48:39,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717035315] [2021-07-13 19:48:39,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:48:39,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:39,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:48:39,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:48:39,785 INFO L87 Difference]: Start difference. First operand 235 states and 614 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:40,310 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-07-13 19:48:40,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:40,325 INFO L93 Difference]: Finished difference Result 341 states and 817 transitions. [2021-07-13 19:48:40,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:48:40,325 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:40,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:40,325 INFO L225 Difference]: With dead ends: 341 [2021-07-13 19:48:40,325 INFO L226 Difference]: Without dead ends: 334 [2021-07-13 19:48:40,326 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 669.9ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:48:40,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-07-13 19:48:40,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 235. [2021-07-13 19:48:40,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.623931623931624) internal successors, (614), 234 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:40,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 614 transitions. [2021-07-13 19:48:40,328 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 614 transitions. Word has length 18 [2021-07-13 19:48:40,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:40,329 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 614 transitions. [2021-07-13 19:48:40,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:40,329 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 614 transitions. [2021-07-13 19:48:40,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:40,329 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:40,329 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:40,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12086,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:40,529 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:40,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:40,530 INFO L82 PathProgramCache]: Analyzing trace with hash -345222088, now seen corresponding path program 377 times [2021-07-13 19:48:40,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:40,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074927700] [2021-07-13 19:48:40,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:40,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:40,708 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:40,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:40,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074927700] [2021-07-13 19:48:40,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074927700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:40,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616449605] [2021-07-13 19:48:40,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:40,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:48:40,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:40,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:48:40,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:41,017 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:41,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616449605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:41,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:41,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 19:48:41,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50511689] [2021-07-13 19:48:41,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:48:41,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:41,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:48:41,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:48:41,018 INFO L87 Difference]: Start difference. First operand 235 states and 614 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:41,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:41,755 INFO L93 Difference]: Finished difference Result 342 states and 817 transitions. [2021-07-13 19:48:41,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:48:41,756 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:41,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:41,756 INFO L225 Difference]: With dead ends: 342 [2021-07-13 19:48:41,756 INFO L226 Difference]: Without dead ends: 335 [2021-07-13 19:48:41,757 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 793.2ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:48:41,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-07-13 19:48:41,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 234. [2021-07-13 19:48:41,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.6180257510729614) internal successors, (610), 233 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:41,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 610 transitions. [2021-07-13 19:48:41,759 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 610 transitions. Word has length 18 [2021-07-13 19:48:41,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:41,759 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 610 transitions. [2021-07-13 19:48:41,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:41,760 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 610 transitions. [2021-07-13 19:48:41,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:41,760 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:41,760 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:41,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12122,381 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:41,960 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:41,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:41,961 INFO L82 PathProgramCache]: Analyzing trace with hash -171974396, now seen corresponding path program 378 times [2021-07-13 19:48:41,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:41,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226798687] [2021-07-13 19:48:41,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:41,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:42,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:42,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:42,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226798687] [2021-07-13 19:48:42,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226798687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:42,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320841074] [2021-07-13 19:48:42,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:42,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:48:42,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:42,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:48:42,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:42,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:42,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:42,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-13 19:48:42,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:42,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:42,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:42,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-13 19:48:42,588 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:42,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:42,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:42,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-07-13 19:48:42,595 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:42,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:42,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:42,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-13 19:48:42,602 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:42,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:42,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:42,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-13 19:48:42,610 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:42,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:48:42,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:48:42,616 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:42,811 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 63 [2021-07-13 19:48:42,812 INFO L628 ElimStorePlain]: treesize reduction 919, result has 11.9 percent of original size [2021-07-13 19:48:42,812 INFO L518 ElimStorePlain]: Eliminatee v_prenex_328 vanished before elimination [2021-07-13 19:48:42,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:48:42,816 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:42,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:48:42,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:48:42,861 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:42,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:48:42,899 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:48:42,899 INFO L518 ElimStorePlain]: Eliminatee v_prenex_330 vanished before elimination [2021-07-13 19:48:42,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:48:42,903 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:48:42,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:48:42,939 INFO L518 ElimStorePlain]: Eliminatee v_prenex_326 vanished before elimination [2021-07-13 19:48:42,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:48:42,945 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1201, output treesize:77 [2021-07-13 19:48:43,048 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:43,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320841074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:43,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:43,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 19:48:43,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071626753] [2021-07-13 19:48:43,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:48:43,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:43,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:48:43,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:48:43,049 INFO L87 Difference]: Start difference. First operand 234 states and 610 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:43,454 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 84 [2021-07-13 19:48:43,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:43,745 INFO L93 Difference]: Finished difference Result 335 states and 802 transitions. [2021-07-13 19:48:43,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:48:43,745 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:43,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:43,746 INFO L225 Difference]: With dead ends: 335 [2021-07-13 19:48:43,746 INFO L226 Difference]: Without dead ends: 321 [2021-07-13 19:48:43,746 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 891.1ms TimeCoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:48:43,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-07-13 19:48:43,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 234. [2021-07-13 19:48:43,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.6180257510729614) internal successors, (610), 233 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:43,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 610 transitions. [2021-07-13 19:48:43,749 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 610 transitions. Word has length 18 [2021-07-13 19:48:43,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:43,749 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 610 transitions. [2021-07-13 19:48:43,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:43,749 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 610 transitions. [2021-07-13 19:48:43,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:43,749 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:43,749 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:43,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 382 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12157 [2021-07-13 19:48:43,950 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:43,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:43,950 INFO L82 PathProgramCache]: Analyzing trace with hash -408825604, now seen corresponding path program 379 times [2021-07-13 19:48:43,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:43,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123383952] [2021-07-13 19:48:43,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:43,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:44,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:44,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:44,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123383952] [2021-07-13 19:48:44,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123383952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:44,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507091143] [2021-07-13 19:48:44,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:44,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:44,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:48:44,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:44,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:44,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507091143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:44,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:44,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 19:48:44,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367414181] [2021-07-13 19:48:44,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:48:44,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:44,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:48:44,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:48:44,680 INFO L87 Difference]: Start difference. First operand 234 states and 610 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:45,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:45,468 INFO L93 Difference]: Finished difference Result 387 states and 901 transitions. [2021-07-13 19:48:45,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:48:45,469 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:45,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:45,469 INFO L225 Difference]: With dead ends: 387 [2021-07-13 19:48:45,469 INFO L226 Difference]: Without dead ends: 373 [2021-07-13 19:48:45,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 999.7ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:48:45,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-07-13 19:48:45,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 244. [2021-07-13 19:48:45,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.6502057613168724) internal successors, (644), 243 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:45,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 644 transitions. [2021-07-13 19:48:45,472 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 644 transitions. Word has length 18 [2021-07-13 19:48:45,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:45,473 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 644 transitions. [2021-07-13 19:48:45,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:45,473 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 644 transitions. [2021-07-13 19:48:45,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:45,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:45,473 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:45,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12203 [2021-07-13 19:48:45,674 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:45,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:45,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1282759032, now seen corresponding path program 380 times [2021-07-13 19:48:45,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:45,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340016726] [2021-07-13 19:48:45,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:45,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:45,850 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:45,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:45,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340016726] [2021-07-13 19:48:45,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340016726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:45,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807799959] [2021-07-13 19:48:45,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:45,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:48:45,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:45,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:48:45,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:46,194 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:46,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807799959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:46,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:46,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-07-13 19:48:46,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588626908] [2021-07-13 19:48:46,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:48:46,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:46,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:48:46,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:48:46,195 INFO L87 Difference]: Start difference. First operand 244 states and 644 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:46,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:46,663 INFO L93 Difference]: Finished difference Result 364 states and 858 transitions. [2021-07-13 19:48:46,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:48:46,663 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:46,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:46,664 INFO L225 Difference]: With dead ends: 364 [2021-07-13 19:48:46,664 INFO L226 Difference]: Without dead ends: 357 [2021-07-13 19:48:46,664 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 560.7ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:48:46,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-07-13 19:48:46,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 243. [2021-07-13 19:48:46,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.644628099173554) internal successors, (640), 242 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:46,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 640 transitions. [2021-07-13 19:48:46,667 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 640 transitions. Word has length 18 [2021-07-13 19:48:46,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:46,667 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 640 transitions. [2021-07-13 19:48:46,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:46,667 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 640 transitions. [2021-07-13 19:48:46,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:46,667 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:46,667 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:46,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12237 [2021-07-13 19:48:46,868 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:46,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:46,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1456006724, now seen corresponding path program 381 times [2021-07-13 19:48:46,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:46,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355510270] [2021-07-13 19:48:46,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:46,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:47,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:47,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:47,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355510270] [2021-07-13 19:48:47,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355510270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:47,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815624496] [2021-07-13 19:48:47,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:47,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:48:47,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:47,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:48:47,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:47,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815624496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:47,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:47,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 19:48:47,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606908986] [2021-07-13 19:48:47,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:48:47,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:47,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:48:47,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:48:47,399 INFO L87 Difference]: Start difference. First operand 243 states and 640 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:47,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:47,985 INFO L93 Difference]: Finished difference Result 361 states and 849 transitions. [2021-07-13 19:48:47,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:48:47,985 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:47,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:47,986 INFO L225 Difference]: With dead ends: 361 [2021-07-13 19:48:47,986 INFO L226 Difference]: Without dead ends: 354 [2021-07-13 19:48:47,986 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 673.9ms TimeCoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:48:47,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-07-13 19:48:47,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 239. [2021-07-13 19:48:47,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.630252100840336) internal successors, (626), 238 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:47,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 626 transitions. [2021-07-13 19:48:47,989 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 626 transitions. Word has length 18 [2021-07-13 19:48:47,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:47,989 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 626 transitions. [2021-07-13 19:48:47,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:47,989 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 626 transitions. [2021-07-13 19:48:47,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:47,989 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:47,990 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:48,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12271,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:48,193 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:48,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:48,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1763249416, now seen corresponding path program 382 times [2021-07-13 19:48:48,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:48,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289287201] [2021-07-13 19:48:48,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:48,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:48,509 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:48,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:48,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289287201] [2021-07-13 19:48:48,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289287201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:48,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874795878] [2021-07-13 19:48:48,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:48,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:48:48,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:48,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:48:48,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:48,884 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:48,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874795878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:48,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:48,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 19:48:48,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419478189] [2021-07-13 19:48:48,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:48:48,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:48,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:48:48,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:48:48,885 INFO L87 Difference]: Start difference. First operand 239 states and 626 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:49,150 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-07-13 19:48:49,358 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-07-13 19:48:49,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:49,592 INFO L93 Difference]: Finished difference Result 333 states and 794 transitions. [2021-07-13 19:48:49,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:48:49,592 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:49,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:49,593 INFO L225 Difference]: With dead ends: 333 [2021-07-13 19:48:49,593 INFO L226 Difference]: Without dead ends: 326 [2021-07-13 19:48:49,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 919.9ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:48:49,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-07-13 19:48:49,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 238. [2021-07-13 19:48:49,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.628691983122363) internal successors, (623), 237 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:49,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 623 transitions. [2021-07-13 19:48:49,596 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 623 transitions. Word has length 18 [2021-07-13 19:48:49,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:49,596 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 623 transitions. [2021-07-13 19:48:49,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:49,596 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 623 transitions. [2021-07-13 19:48:49,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:49,596 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:49,596 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:49,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12305 [2021-07-13 19:48:49,797 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:49,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:49,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1873276766, now seen corresponding path program 383 times [2021-07-13 19:48:49,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:49,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437907831] [2021-07-13 19:48:49,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:49,998 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:49,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:49,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437907831] [2021-07-13 19:48:49,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437907831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:49,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243394084] [2021-07-13 19:48:49,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:50,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:48:50,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:50,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:48:50,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:50,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:50,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243394084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:50,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:50,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 19:48:50,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543705283] [2021-07-13 19:48:50,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:48:50,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:50,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:48:50,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:48:50,396 INFO L87 Difference]: Start difference. First operand 238 states and 623 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:51,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:51,149 INFO L93 Difference]: Finished difference Result 385 states and 922 transitions. [2021-07-13 19:48:51,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:48:51,150 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:51,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:51,150 INFO L225 Difference]: With dead ends: 385 [2021-07-13 19:48:51,150 INFO L226 Difference]: Without dead ends: 366 [2021-07-13 19:48:51,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 783.4ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:48:51,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-07-13 19:48:51,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 281. [2021-07-13 19:48:51,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.6714285714285713) internal successors, (748), 280 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:51,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 748 transitions. [2021-07-13 19:48:51,153 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 748 transitions. Word has length 18 [2021-07-13 19:48:51,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:51,154 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 748 transitions. [2021-07-13 19:48:51,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:51,154 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 748 transitions. [2021-07-13 19:48:51,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:51,154 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:51,154 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:51,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12339,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:51,355 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:51,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:51,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1721197542, now seen corresponding path program 384 times [2021-07-13 19:48:51,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:51,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095207404] [2021-07-13 19:48:51,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:51,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:51,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:51,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:51,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095207404] [2021-07-13 19:48:51,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095207404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:51,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830800381] [2021-07-13 19:48:51,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:51,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:48:51,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:51,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:48:51,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:51,886 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:51,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830800381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:51,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:51,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-07-13 19:48:51,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478146190] [2021-07-13 19:48:51,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:48:51,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:51,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:48:51,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:48:51,887 INFO L87 Difference]: Start difference. First operand 281 states and 748 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:52,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:52,281 INFO L93 Difference]: Finished difference Result 395 states and 941 transitions. [2021-07-13 19:48:52,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:48:52,282 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:52,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:52,282 INFO L225 Difference]: With dead ends: 395 [2021-07-13 19:48:52,282 INFO L226 Difference]: Without dead ends: 388 [2021-07-13 19:48:52,283 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 356.2ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:48:52,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-07-13 19:48:52,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 282. [2021-07-13 19:48:52,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.676156583629893) internal successors, (752), 281 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:52,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 752 transitions. [2021-07-13 19:48:52,286 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 752 transitions. Word has length 18 [2021-07-13 19:48:52,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:52,286 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 752 transitions. [2021-07-13 19:48:52,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:52,286 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 752 transitions. [2021-07-13 19:48:52,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:52,286 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:52,286 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:52,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12411 [2021-07-13 19:48:52,487 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:52,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:52,487 INFO L82 PathProgramCache]: Analyzing trace with hash -882185118, now seen corresponding path program 385 times [2021-07-13 19:48:52,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:52,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542186639] [2021-07-13 19:48:52,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:52,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:52,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:52,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:52,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542186639] [2021-07-13 19:48:52,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542186639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:52,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454590571] [2021-07-13 19:48:52,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:52,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:52,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:48:52,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:53,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454590571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:53,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:53,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-07-13 19:48:53,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648551228] [2021-07-13 19:48:53,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:48:53,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:53,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:48:53,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:48:53,137 INFO L87 Difference]: Start difference. First operand 282 states and 752 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:53,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:53,579 INFO L93 Difference]: Finished difference Result 383 states and 923 transitions. [2021-07-13 19:48:53,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:48:53,579 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:53,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:53,580 INFO L225 Difference]: With dead ends: 383 [2021-07-13 19:48:53,580 INFO L226 Difference]: Without dead ends: 376 [2021-07-13 19:48:53,580 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 404.2ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:48:53,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-07-13 19:48:53,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 279. [2021-07-13 19:48:53,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.6690647482014387) internal successors, (742), 278 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:53,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 742 transitions. [2021-07-13 19:48:53,583 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 742 transitions. Word has length 18 [2021-07-13 19:48:53,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:53,583 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 742 transitions. [2021-07-13 19:48:53,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:53,583 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 742 transitions. [2021-07-13 19:48:53,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:53,584 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:53,584 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:53,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12537,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:53,784 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:53,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:53,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1185967740, now seen corresponding path program 386 times [2021-07-13 19:48:53,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:53,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268099240] [2021-07-13 19:48:53,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:53,898 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:53,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:53,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268099240] [2021-07-13 19:48:53,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268099240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:53,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139077029] [2021-07-13 19:48:53,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:53,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:48:53,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:53,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:48:53,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:54,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:54,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139077029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:54,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:54,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-07-13 19:48:54,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571598714] [2021-07-13 19:48:54,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:48:54,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:54,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:48:54,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:48:54,170 INFO L87 Difference]: Start difference. First operand 279 states and 742 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:54,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:54,633 INFO L93 Difference]: Finished difference Result 400 states and 952 transitions. [2021-07-13 19:48:54,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:48:54,633 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:54,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:54,634 INFO L225 Difference]: With dead ends: 400 [2021-07-13 19:48:54,634 INFO L226 Difference]: Without dead ends: 393 [2021-07-13 19:48:54,634 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 504.0ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:48:54,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-07-13 19:48:54,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 282. [2021-07-13 19:48:54,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.679715302491103) internal successors, (753), 281 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:54,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 753 transitions. [2021-07-13 19:48:54,637 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 753 transitions. Word has length 18 [2021-07-13 19:48:54,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:54,637 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 753 transitions. [2021-07-13 19:48:54,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:54,637 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 753 transitions. [2021-07-13 19:48:54,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:54,638 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:54,638 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:54,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12708 [2021-07-13 19:48:54,838 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:54,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:54,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1417414920, now seen corresponding path program 387 times [2021-07-13 19:48:54,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:54,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996486103] [2021-07-13 19:48:54,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:54,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:54,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:54,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:54,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996486103] [2021-07-13 19:48:54,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996486103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:54,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848924210] [2021-07-13 19:48:54,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:54,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:48:54,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:54,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:48:54,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:55,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:55,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848924210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:55,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:55,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-07-13 19:48:55,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395534813] [2021-07-13 19:48:55,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:48:55,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:55,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:48:55,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:48:55,241 INFO L87 Difference]: Start difference. First operand 282 states and 753 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:55,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:55,735 INFO L93 Difference]: Finished difference Result 401 states and 952 transitions. [2021-07-13 19:48:55,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:48:55,735 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:55,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:55,736 INFO L225 Difference]: With dead ends: 401 [2021-07-13 19:48:55,736 INFO L226 Difference]: Without dead ends: 394 [2021-07-13 19:48:55,736 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 527.8ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:48:55,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-07-13 19:48:55,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 281. [2021-07-13 19:48:55,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.675) internal successors, (749), 280 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:55,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 749 transitions. [2021-07-13 19:48:55,739 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 749 transitions. Word has length 18 [2021-07-13 19:48:55,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:55,739 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 749 transitions. [2021-07-13 19:48:55,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:55,739 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 749 transitions. [2021-07-13 19:48:55,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:55,740 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:55,740 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:55,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12742 [2021-07-13 19:48:55,940 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:55,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:55,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1244167228, now seen corresponding path program 388 times [2021-07-13 19:48:55,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:55,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030929240] [2021-07-13 19:48:55,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:55,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:56,096 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:56,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:56,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030929240] [2021-07-13 19:48:56,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030929240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:56,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134795541] [2021-07-13 19:48:56,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:56,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:48:56,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:56,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:48:56,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:56,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:56,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134795541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:56,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:56,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 19:48:56,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572116994] [2021-07-13 19:48:56,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:48:56,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:56,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:48:56,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:48:56,433 INFO L87 Difference]: Start difference. First operand 281 states and 749 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:57,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:57,034 INFO L93 Difference]: Finished difference Result 383 states and 921 transitions. [2021-07-13 19:48:57,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:48:57,034 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:57,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:57,035 INFO L225 Difference]: With dead ends: 383 [2021-07-13 19:48:57,035 INFO L226 Difference]: Without dead ends: 376 [2021-07-13 19:48:57,035 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 662.5ms TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:48:57,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-07-13 19:48:57,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 279. [2021-07-13 19:48:57,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.6690647482014387) internal successors, (742), 278 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:57,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 742 transitions. [2021-07-13 19:48:57,038 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 742 transitions. Word has length 18 [2021-07-13 19:48:57,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:57,038 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 742 transitions. [2021-07-13 19:48:57,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:57,038 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 742 transitions. [2021-07-13 19:48:57,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:57,039 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:57,039 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:57,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12778 [2021-07-13 19:48:57,239 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:57,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:57,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1773713062, now seen corresponding path program 389 times [2021-07-13 19:48:57,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:57,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639704675] [2021-07-13 19:48:57,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:57,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:48:57,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:57,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639704675] [2021-07-13 19:48:57,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639704675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:57,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796692539] [2021-07-13 19:48:57,449 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:57,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:48:57,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:57,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:48:57,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:57,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796692539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:57,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:57,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-07-13 19:48:57,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480355580] [2021-07-13 19:48:57,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:48:57,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:57,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:48:57,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:48:57,765 INFO L87 Difference]: Start difference. First operand 279 states and 742 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:58,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:58,187 INFO L93 Difference]: Finished difference Result 344 states and 853 transitions. [2021-07-13 19:48:58,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:48:58,187 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:58,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:58,188 INFO L225 Difference]: With dead ends: 344 [2021-07-13 19:48:58,188 INFO L226 Difference]: Without dead ends: 337 [2021-07-13 19:48:58,188 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 596.9ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:48:58,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-07-13 19:48:58,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 283. [2021-07-13 19:48:58,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.6843971631205674) internal successors, (757), 282 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:58,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 757 transitions. [2021-07-13 19:48:58,191 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 757 transitions. Word has length 18 [2021-07-13 19:48:58,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:58,191 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 757 transitions. [2021-07-13 19:48:58,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:58,191 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 757 transitions. [2021-07-13 19:48:58,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:58,192 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:58,192 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:58,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12815,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:58,392 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:58,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:58,392 INFO L82 PathProgramCache]: Analyzing trace with hash -829669598, now seen corresponding path program 390 times [2021-07-13 19:48:58,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:58,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610739225] [2021-07-13 19:48:58,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:58,581 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:48:58,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:58,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610739225] [2021-07-13 19:48:58,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610739225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:58,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109889581] [2021-07-13 19:48:58,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:58,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:48:58,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:58,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:48:58,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:58,903 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:58,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109889581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:58,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:58,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-07-13 19:48:58,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710367600] [2021-07-13 19:48:58,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:48:58,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:58,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:48:58,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:48:58,905 INFO L87 Difference]: Start difference. First operand 283 states and 757 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:59,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:59,372 INFO L93 Difference]: Finished difference Result 346 states and 855 transitions. [2021-07-13 19:48:59,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:48:59,372 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:48:59,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:59,373 INFO L225 Difference]: With dead ends: 346 [2021-07-13 19:48:59,373 INFO L226 Difference]: Without dead ends: 339 [2021-07-13 19:48:59,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 587.7ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:48:59,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-07-13 19:48:59,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 282. [2021-07-13 19:48:59,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.679715302491103) internal successors, (753), 281 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:59,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 753 transitions. [2021-07-13 19:48:59,376 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 753 transitions. Word has length 18 [2021-07-13 19:48:59,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:59,376 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 753 transitions. [2021-07-13 19:48:59,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:59,376 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 753 transitions. [2021-07-13 19:48:59,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:48:59,377 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:59,377 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:59,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12851 [2021-07-13 19:48:59,577 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:59,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:59,577 INFO L82 PathProgramCache]: Analyzing trace with hash -656421906, now seen corresponding path program 391 times [2021-07-13 19:48:59,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:59,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120524791] [2021-07-13 19:48:59,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:59,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:59,771 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:59,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:59,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120524791] [2021-07-13 19:48:59,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120524791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:59,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119760873] [2021-07-13 19:48:59,771 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:59,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:59,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:48:59,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:00,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119760873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:00,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:00,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-13 19:49:00,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726121212] [2021-07-13 19:49:00,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:49:00,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:00,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:49:00,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:49:00,170 INFO L87 Difference]: Start difference. First operand 282 states and 753 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:00,626 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 60 [2021-07-13 19:49:00,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:00,697 INFO L93 Difference]: Finished difference Result 303 states and 783 transitions. [2021-07-13 19:49:00,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:49:00,697 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:49:00,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:00,698 INFO L225 Difference]: With dead ends: 303 [2021-07-13 19:49:00,698 INFO L226 Difference]: Without dead ends: 292 [2021-07-13 19:49:00,698 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 734.6ms TimeCoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:49:00,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-07-13 19:49:00,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 282. [2021-07-13 19:49:00,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.676156583629893) internal successors, (752), 281 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:00,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 752 transitions. [2021-07-13 19:49:00,701 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 752 transitions. Word has length 18 [2021-07-13 19:49:00,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:00,701 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 752 transitions. [2021-07-13 19:49:00,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:00,701 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 752 transitions. [2021-07-13 19:49:00,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:49:00,702 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:00,702 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:00,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12888,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:00,902 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:00,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:00,902 INFO L82 PathProgramCache]: Analyzing trace with hash 419289250, now seen corresponding path program 392 times [2021-07-13 19:49:00,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:00,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166607545] [2021-07-13 19:49:00,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:00,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:01,041 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:49:01,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:01,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166607545] [2021-07-13 19:49:01,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166607545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:01,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116838088] [2021-07-13 19:49:01,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:01,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:49:01,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:01,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:49:01,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:01,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:01,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:01,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-07-13 19:49:01,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:01,598 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:49:01,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:01,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:01,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:01,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-13 19:49:01,605 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:01,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:01,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:01,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-13 19:49:01,613 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:01,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:01,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:01,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:49:01,620 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:01,625 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:49:01,626 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:01,820 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 65 [2021-07-13 19:49:01,821 INFO L628 ElimStorePlain]: treesize reduction 927, result has 11.8 percent of original size [2021-07-13 19:49:01,821 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:49:01,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:49:01,825 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:01,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:01,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:01,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:49:01,870 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:01,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:01,908 INFO L518 ElimStorePlain]: Eliminatee v_prenex_356 vanished before elimination [2021-07-13 19:49:01,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:49:01,911 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:01,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:01,947 INFO L518 ElimStorePlain]: Eliminatee v_prenex_358 vanished before elimination [2021-07-13 19:49:01,947 INFO L518 ElimStorePlain]: Eliminatee v_prenex_359 vanished before elimination [2021-07-13 19:49:01,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:49:01,949 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1201, output treesize:77 [2021-07-13 19:49:02,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:02,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116838088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:02,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:02,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 19:49:02,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748888735] [2021-07-13 19:49:02,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:49:02,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:02,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:49:02,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:02,062 INFO L87 Difference]: Start difference. First operand 282 states and 752 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:02,427 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 95 [2021-07-13 19:49:02,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:02,779 INFO L93 Difference]: Finished difference Result 351 states and 858 transitions. [2021-07-13 19:49:02,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:49:02,780 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:49:02,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:02,780 INFO L225 Difference]: With dead ends: 351 [2021-07-13 19:49:02,780 INFO L226 Difference]: Without dead ends: 337 [2021-07-13 19:49:02,780 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 963.0ms TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:49:02,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-07-13 19:49:02,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 282. [2021-07-13 19:49:02,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.676156583629893) internal successors, (752), 281 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:02,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 752 transitions. [2021-07-13 19:49:02,783 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 752 transitions. Word has length 18 [2021-07-13 19:49:02,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:02,784 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 752 transitions. [2021-07-13 19:49:02,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:02,784 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 752 transitions. [2021-07-13 19:49:02,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:49:02,784 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:02,784 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:02,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12922 [2021-07-13 19:49:02,985 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:02,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:02,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1481018436, now seen corresponding path program 393 times [2021-07-13 19:49:02,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:02,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569890811] [2021-07-13 19:49:02,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:03,258 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:03,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:03,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569890811] [2021-07-13 19:49:03,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569890811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:03,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222595319] [2021-07-13 19:49:03,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:03,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:49:03,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:03,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:49:03,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:03,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:03,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:03,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-13 19:49:03,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:03,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:03,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:03,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-13 19:49:03,659 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:03,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:03,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:03,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:49:03,665 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:03,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:03,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:03,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-07-13 19:49:03,672 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:03,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:03,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:03,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-13 19:49:03,687 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:03,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:03,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-13 19:49:03,693 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:03,837 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 55 [2021-07-13 19:49:03,838 INFO L628 ElimStorePlain]: treesize reduction 676, result has 13.0 percent of original size [2021-07-13 19:49:03,838 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:49:03,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:49:03,842 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:03,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:03,875 INFO L518 ElimStorePlain]: Eliminatee v_prenex_365 vanished before elimination [2021-07-13 19:49:03,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:49:03,881 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:03,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:03,912 INFO L518 ElimStorePlain]: Eliminatee v_prenex_367 vanished before elimination [2021-07-13 19:49:03,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:49:03,914 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:949, output treesize:85 [2021-07-13 19:49:04,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:04,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222595319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:04,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:04,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-13 19:49:04,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045701774] [2021-07-13 19:49:04,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:49:04,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:04,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:49:04,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:49:04,078 INFO L87 Difference]: Start difference. First operand 282 states and 752 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:04,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:04,746 INFO L93 Difference]: Finished difference Result 437 states and 1021 transitions. [2021-07-13 19:49:04,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:49:04,747 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:49:04,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:04,747 INFO L225 Difference]: With dead ends: 437 [2021-07-13 19:49:04,747 INFO L226 Difference]: Without dead ends: 423 [2021-07-13 19:49:04,747 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 883.3ms TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:49:04,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-07-13 19:49:04,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 292. [2021-07-13 19:49:04,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.7010309278350517) internal successors, (786), 291 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:04,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 786 transitions. [2021-07-13 19:49:04,751 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 786 transitions. Word has length 18 [2021-07-13 19:49:04,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:04,751 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 786 transitions. [2021-07-13 19:49:04,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:04,751 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 786 transitions. [2021-07-13 19:49:04,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:49:04,751 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:04,751 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:04,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12968 [2021-07-13 19:49:04,952 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:04,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:04,952 INFO L82 PathProgramCache]: Analyzing trace with hash 210566200, now seen corresponding path program 394 times [2021-07-13 19:49:04,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:04,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080769326] [2021-07-13 19:49:04,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:04,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:05,104 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:05,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:05,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080769326] [2021-07-13 19:49:05,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080769326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:05,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432254227] [2021-07-13 19:49:05,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:05,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:49:05,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:05,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:49:05,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:05,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:05,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432254227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:05,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:05,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:49:05,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552471267] [2021-07-13 19:49:05,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:49:05,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:05,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:49:05,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:49:05,469 INFO L87 Difference]: Start difference. First operand 292 states and 786 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:05,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:05,889 INFO L93 Difference]: Finished difference Result 416 states and 986 transitions. [2021-07-13 19:49:05,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:49:05,890 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:49:05,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:05,890 INFO L225 Difference]: With dead ends: 416 [2021-07-13 19:49:05,890 INFO L226 Difference]: Without dead ends: 409 [2021-07-13 19:49:05,890 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 499.1ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:49:05,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-07-13 19:49:05,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 291. [2021-07-13 19:49:05,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.696551724137931) internal successors, (782), 290 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:05,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 782 transitions. [2021-07-13 19:49:05,894 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 782 transitions. Word has length 18 [2021-07-13 19:49:05,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:05,894 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 782 transitions. [2021-07-13 19:49:05,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:05,894 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 782 transitions. [2021-07-13 19:49:05,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:49:05,894 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:05,894 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:06,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13006 [2021-07-13 19:49:06,095 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:06,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:06,095 INFO L82 PathProgramCache]: Analyzing trace with hash 383813892, now seen corresponding path program 395 times [2021-07-13 19:49:06,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:06,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450302300] [2021-07-13 19:49:06,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:06,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:06,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:06,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:06,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450302300] [2021-07-13 19:49:06,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450302300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:06,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624420298] [2021-07-13 19:49:06,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:06,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:49:06,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:06,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:49:06,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:06,729 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:06,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624420298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:06,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:06,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:49:06,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142271540] [2021-07-13 19:49:06,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:49:06,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:06,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:49:06,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:49:06,730 INFO L87 Difference]: Start difference. First operand 291 states and 782 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:07,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:07,358 INFO L93 Difference]: Finished difference Result 418 states and 980 transitions. [2021-07-13 19:49:07,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:49:07,358 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:49:07,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:07,359 INFO L225 Difference]: With dead ends: 418 [2021-07-13 19:49:07,359 INFO L226 Difference]: Without dead ends: 411 [2021-07-13 19:49:07,359 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 777.8ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:49:07,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-07-13 19:49:07,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 287. [2021-07-13 19:49:07,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.6853146853146854) internal successors, (768), 286 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:07,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 768 transitions. [2021-07-13 19:49:07,363 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 768 transitions. Word has length 18 [2021-07-13 19:49:07,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:07,363 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 768 transitions. [2021-07-13 19:49:07,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:07,363 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 768 transitions. [2021-07-13 19:49:07,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:49:07,363 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:07,363 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:07,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13041 [2021-07-13 19:49:07,577 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:07,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:07,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1459525048, now seen corresponding path program 396 times [2021-07-13 19:49:07,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:07,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118090928] [2021-07-13 19:49:07,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:07,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:08,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:08,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:08,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118090928] [2021-07-13 19:49:08,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118090928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:08,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000293083] [2021-07-13 19:49:08,023 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:08,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:49:08,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:08,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:49:08,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:08,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:08,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000293083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:08,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:08,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-13 19:49:08,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754753195] [2021-07-13 19:49:08,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:49:08,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:08,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:49:08,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:49:08,462 INFO L87 Difference]: Start difference. First operand 287 states and 768 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:08,931 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 52 [2021-07-13 19:49:09,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:09,109 INFO L93 Difference]: Finished difference Result 310 states and 803 transitions. [2021-07-13 19:49:09,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:49:09,109 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:49:09,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:09,110 INFO L225 Difference]: With dead ends: 310 [2021-07-13 19:49:09,110 INFO L226 Difference]: Without dead ends: 303 [2021-07-13 19:49:09,110 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1103.7ms TimeCoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:49:09,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-07-13 19:49:09,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 286. [2021-07-13 19:49:09,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.6842105263157894) internal successors, (765), 285 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:09,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 765 transitions. [2021-07-13 19:49:09,113 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 765 transitions. Word has length 18 [2021-07-13 19:49:09,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:09,113 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 765 transitions. [2021-07-13 19:49:09,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:09,113 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 765 transitions. [2021-07-13 19:49:09,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:49:09,114 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:09,114 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:09,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13075,400 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:09,314 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:09,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:09,314 INFO L82 PathProgramCache]: Analyzing trace with hash 446832516, now seen corresponding path program 397 times [2021-07-13 19:49:09,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:09,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110063309] [2021-07-13 19:49:09,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:09,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:09,576 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:09,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:09,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110063309] [2021-07-13 19:49:09,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110063309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:09,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856343887] [2021-07-13 19:49:09,577 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:09,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:09,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:49:09,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:09,979 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:09,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856343887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:09,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:09,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:49:09,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607970332] [2021-07-13 19:49:09,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:49:09,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:09,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:49:09,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:09,980 INFO L87 Difference]: Start difference. First operand 286 states and 765 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:10,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:10,452 INFO L93 Difference]: Finished difference Result 383 states and 914 transitions. [2021-07-13 19:49:10,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:49:10,452 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:49:10,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:10,453 INFO L225 Difference]: With dead ends: 383 [2021-07-13 19:49:10,453 INFO L226 Difference]: Without dead ends: 376 [2021-07-13 19:49:10,453 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 637.7ms TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:49:10,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-07-13 19:49:10,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 282. [2021-07-13 19:49:10,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.676156583629893) internal successors, (752), 281 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:10,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 752 transitions. [2021-07-13 19:49:10,457 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 752 transitions. Word has length 18 [2021-07-13 19:49:10,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:10,457 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 752 transitions. [2021-07-13 19:49:10,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:10,457 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 752 transitions. [2021-07-13 19:49:10,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:49:10,458 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:10,458 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:10,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13110,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:10,673 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:10,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:10,673 INFO L82 PathProgramCache]: Analyzing trace with hash 724445586, now seen corresponding path program 398 times [2021-07-13 19:49:10,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:10,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643574054] [2021-07-13 19:49:10,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:10,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:10,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:10,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:10,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643574054] [2021-07-13 19:49:10,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643574054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:10,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426064352] [2021-07-13 19:49:10,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:10,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:49:10,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:10,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:49:10,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:11,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:11,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426064352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:11,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:11,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:49:11,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095774907] [2021-07-13 19:49:11,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:49:11,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:11,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:49:11,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:49:11,275 INFO L87 Difference]: Start difference. First operand 282 states and 752 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:11,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:11,706 INFO L93 Difference]: Finished difference Result 391 states and 948 transitions. [2021-07-13 19:49:11,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:49:11,707 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:49:11,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:11,707 INFO L225 Difference]: With dead ends: 391 [2021-07-13 19:49:11,707 INFO L226 Difference]: Without dead ends: 384 [2021-07-13 19:49:11,707 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 576.0ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:49:11,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-07-13 19:49:11,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 290. [2021-07-13 19:49:11,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.698961937716263) internal successors, (780), 289 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:11,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 780 transitions. [2021-07-13 19:49:11,711 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 780 transitions. Word has length 18 [2021-07-13 19:49:11,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:11,711 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 780 transitions. [2021-07-13 19:49:11,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:11,711 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 780 transitions. [2021-07-13 19:49:11,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:49:11,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:11,711 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:11,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13144,402 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:11,912 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:11,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:11,912 INFO L82 PathProgramCache]: Analyzing trace with hash 23952598, now seen corresponding path program 399 times [2021-07-13 19:49:11,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:11,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835937685] [2021-07-13 19:49:11,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:12,036 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:12,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:12,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835937685] [2021-07-13 19:49:12,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835937685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:12,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389046984] [2021-07-13 19:49:12,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:12,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:49:12,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:12,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:49:12,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:12,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:12,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389046984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:12,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:12,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-07-13 19:49:12,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957372759] [2021-07-13 19:49:12,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:49:12,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:12,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:49:12,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:49:12,437 INFO L87 Difference]: Start difference. First operand 290 states and 780 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:12,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:12,932 INFO L93 Difference]: Finished difference Result 416 states and 996 transitions. [2021-07-13 19:49:12,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:49:12,932 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:49:12,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:12,933 INFO L225 Difference]: With dead ends: 416 [2021-07-13 19:49:12,933 INFO L226 Difference]: Without dead ends: 409 [2021-07-13 19:49:12,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 392.2ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:49:12,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-07-13 19:49:12,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 291. [2021-07-13 19:49:12,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.703448275862069) internal successors, (784), 290 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:12,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 784 transitions. [2021-07-13 19:49:12,936 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 784 transitions. Word has length 18 [2021-07-13 19:49:12,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:12,936 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 784 transitions. [2021-07-13 19:49:12,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:12,936 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 784 transitions. [2021-07-13 19:49:12,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:49:12,937 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:12,937 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:13,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13216,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:13,137 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:13,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:13,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1715537234, now seen corresponding path program 400 times [2021-07-13 19:49:13,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:13,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868560247] [2021-07-13 19:49:13,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:13,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:13,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:13,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:13,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868560247] [2021-07-13 19:49:13,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868560247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:13,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881781108] [2021-07-13 19:49:13,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:13,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:49:13,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:13,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:49:13,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:13,695 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:13,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881781108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:13,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:13,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-07-13 19:49:13,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571269013] [2021-07-13 19:49:13,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:49:13,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:13,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:49:13,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:49:13,696 INFO L87 Difference]: Start difference. First operand 291 states and 784 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:14,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:14,159 INFO L93 Difference]: Finished difference Result 401 states and 973 transitions. [2021-07-13 19:49:14,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:49:14,159 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:49:14,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:14,160 INFO L225 Difference]: With dead ends: 401 [2021-07-13 19:49:14,160 INFO L226 Difference]: Without dead ends: 394 [2021-07-13 19:49:14,160 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 399.9ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:49:14,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-07-13 19:49:14,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 288. [2021-07-13 19:49:14,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 2.6933797909407664) internal successors, (773), 287 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:14,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 773 transitions. [2021-07-13 19:49:14,163 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 773 transitions. Word has length 18 [2021-07-13 19:49:14,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:14,163 INFO L482 AbstractCegarLoop]: Abstraction has 288 states and 773 transitions. [2021-07-13 19:49:14,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:14,164 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 773 transitions. [2021-07-13 19:49:14,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:49:14,164 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:14,164 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:14,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13338 [2021-07-13 19:49:14,365 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:14,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:14,365 INFO L82 PathProgramCache]: Analyzing trace with hash -511277204, now seen corresponding path program 401 times [2021-07-13 19:49:14,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:14,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469446693] [2021-07-13 19:49:14,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:14,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:14,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:14,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:14,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469446693] [2021-07-13 19:49:14,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469446693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:14,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683738052] [2021-07-13 19:49:14,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:14,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:49:14,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:14,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:49:14,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:14,754 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:14,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683738052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:14,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:14,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-07-13 19:49:14,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313547143] [2021-07-13 19:49:14,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:49:14,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:14,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:49:14,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:49:14,755 INFO L87 Difference]: Start difference. First operand 288 states and 773 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:15,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:15,240 INFO L93 Difference]: Finished difference Result 415 states and 999 transitions. [2021-07-13 19:49:15,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:49:15,240 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:49:15,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:15,241 INFO L225 Difference]: With dead ends: 415 [2021-07-13 19:49:15,241 INFO L226 Difference]: Without dead ends: 408 [2021-07-13 19:49:15,241 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 520.2ms TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:49:15,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-07-13 19:49:15,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 291. [2021-07-13 19:49:15,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.703448275862069) internal successors, (784), 290 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:15,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 784 transitions. [2021-07-13 19:49:15,244 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 784 transitions. Word has length 18 [2021-07-13 19:49:15,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:15,245 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 784 transitions. [2021-07-13 19:49:15,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:15,245 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 784 transitions. [2021-07-13 19:49:15,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:49:15,245 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:15,245 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:15,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13465 [2021-07-13 19:49:15,446 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:15,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:15,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1180307432, now seen corresponding path program 402 times [2021-07-13 19:49:15,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:15,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379814007] [2021-07-13 19:49:15,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:15,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:15,613 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:15,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:15,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379814007] [2021-07-13 19:49:15,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379814007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:15,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431572017] [2021-07-13 19:49:15,614 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:15,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:49:15,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:15,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:49:15,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:15,893 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:15,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431572017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:15,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:15,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-13 19:49:15,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47858414] [2021-07-13 19:49:15,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:49:15,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:15,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:49:15,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:49:15,894 INFO L87 Difference]: Start difference. First operand 291 states and 784 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:16,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:16,527 INFO L93 Difference]: Finished difference Result 416 states and 999 transitions. [2021-07-13 19:49:16,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:49:16,528 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:49:16,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:16,528 INFO L225 Difference]: With dead ends: 416 [2021-07-13 19:49:16,528 INFO L226 Difference]: Without dead ends: 409 [2021-07-13 19:49:16,529 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 671.1ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:49:16,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-07-13 19:49:16,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 291. [2021-07-13 19:49:16,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.703448275862069) internal successors, (784), 290 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:16,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 784 transitions. [2021-07-13 19:49:16,532 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 784 transitions. Word has length 18 [2021-07-13 19:49:16,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:16,532 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 784 transitions. [2021-07-13 19:49:16,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:16,532 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 784 transitions. [2021-07-13 19:49:16,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:49:16,532 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:16,532 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:16,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13499 [2021-07-13 19:49:16,733 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:16,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:16,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1353555124, now seen corresponding path program 403 times [2021-07-13 19:49:16,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:16,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534873493] [2021-07-13 19:49:16,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:16,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:16,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:16,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:16,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534873493] [2021-07-13 19:49:16,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534873493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:16,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39615607] [2021-07-13 19:49:16,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:16,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:49:16,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:17,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:17,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39615607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:17,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:17,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-13 19:49:17,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883863549] [2021-07-13 19:49:17,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:49:17,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:17,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:49:17,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:49:17,197 INFO L87 Difference]: Start difference. First operand 291 states and 784 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:17,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:17,760 INFO L93 Difference]: Finished difference Result 398 states and 968 transitions. [2021-07-13 19:49:17,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:49:17,760 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:49:17,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:17,761 INFO L225 Difference]: With dead ends: 398 [2021-07-13 19:49:17,761 INFO L226 Difference]: Without dead ends: 391 [2021-07-13 19:49:17,761 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 626.2ms TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:49:17,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-07-13 19:49:17,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 291. [2021-07-13 19:49:17,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.703448275862069) internal successors, (784), 290 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:17,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 784 transitions. [2021-07-13 19:49:17,764 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 784 transitions. Word has length 18 [2021-07-13 19:49:17,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:17,765 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 784 transitions. [2021-07-13 19:49:17,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:17,765 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 784 transitions. [2021-07-13 19:49:17,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:49:17,765 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:17,765 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:17,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13538 [2021-07-13 19:49:17,965 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:17,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:17,966 INFO L82 PathProgramCache]: Analyzing trace with hash 76468118, now seen corresponding path program 404 times [2021-07-13 19:49:17,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:17,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552994634] [2021-07-13 19:49:17,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:17,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:18,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:18,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:18,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552994634] [2021-07-13 19:49:18,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552994634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:18,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135517153] [2021-07-13 19:49:18,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:18,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:49:18,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:18,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:49:18,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:18,546 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:18,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135517153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:18,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:18,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-07-13 19:49:18,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739424612] [2021-07-13 19:49:18,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:49:18,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:18,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:49:18,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:49:18,547 INFO L87 Difference]: Start difference. First operand 291 states and 784 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:19,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:19,029 INFO L93 Difference]: Finished difference Result 375 states and 931 transitions. [2021-07-13 19:49:19,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:49:19,029 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:49:19,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:19,030 INFO L225 Difference]: With dead ends: 375 [2021-07-13 19:49:19,030 INFO L226 Difference]: Without dead ends: 368 [2021-07-13 19:49:19,030 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 615.2ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:49:19,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-07-13 19:49:19,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 295. [2021-07-13 19:49:19,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.7176870748299318) internal successors, (799), 294 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:19,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 799 transitions. [2021-07-13 19:49:19,033 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 799 transitions. Word has length 18 [2021-07-13 19:49:19,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:19,034 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 799 transitions. [2021-07-13 19:49:19,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:19,034 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 799 transitions. [2021-07-13 19:49:19,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:49:19,034 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:19,034 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:19,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13573,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:19,235 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:19,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:19,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1768052754, now seen corresponding path program 405 times [2021-07-13 19:49:19,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:19,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201493737] [2021-07-13 19:49:19,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:19,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:19,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:19,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:19,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201493737] [2021-07-13 19:49:19,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201493737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:19,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336913785] [2021-07-13 19:49:19,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:19,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:49:19,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:19,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:49:19,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:19,775 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:19,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336913785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:19,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:19,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-13 19:49:19,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36995997] [2021-07-13 19:49:19,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:49:19,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:19,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:49:19,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:49:19,776 INFO L87 Difference]: Start difference. First operand 295 states and 799 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:20,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:20,452 INFO L93 Difference]: Finished difference Result 405 states and 978 transitions. [2021-07-13 19:49:20,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:49:20,452 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:49:20,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:20,453 INFO L225 Difference]: With dead ends: 405 [2021-07-13 19:49:20,453 INFO L226 Difference]: Without dead ends: 391 [2021-07-13 19:49:20,453 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 785.0ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:49:20,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-07-13 19:49:20,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 294. [2021-07-13 19:49:20,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.7133105802047783) internal successors, (795), 293 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:20,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 795 transitions. [2021-07-13 19:49:20,457 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 795 transitions. Word has length 18 [2021-07-13 19:49:20,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:20,457 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 795 transitions. [2021-07-13 19:49:20,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:20,457 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 795 transitions. [2021-07-13 19:49:20,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:49:20,457 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:20,457 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:20,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13607,409 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:20,658 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:20,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:20,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1941300446, now seen corresponding path program 406 times [2021-07-13 19:49:20,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:20,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411671335] [2021-07-13 19:49:20,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:20,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:20,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:20,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:20,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411671335] [2021-07-13 19:49:20,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411671335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:20,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811755522] [2021-07-13 19:49:20,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:20,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:49:20,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:20,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:49:20,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:21,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:21,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811755522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:21,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:21,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-13 19:49:21,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753956996] [2021-07-13 19:49:21,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:49:21,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:21,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:49:21,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:49:21,145 INFO L87 Difference]: Start difference. First operand 294 states and 795 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:21,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:21,744 INFO L93 Difference]: Finished difference Result 373 states and 923 transitions. [2021-07-13 19:49:21,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:49:21,745 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:49:21,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:21,745 INFO L225 Difference]: With dead ends: 373 [2021-07-13 19:49:21,745 INFO L226 Difference]: Without dead ends: 366 [2021-07-13 19:49:21,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 674.5ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:49:21,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-07-13 19:49:21,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 294. [2021-07-13 19:49:21,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.7133105802047783) internal successors, (795), 293 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:21,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 795 transitions. [2021-07-13 19:49:21,749 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 795 transitions. Word has length 18 [2021-07-13 19:49:21,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:21,749 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 795 transitions. [2021-07-13 19:49:21,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:21,749 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 795 transitions. [2021-07-13 19:49:21,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:49:21,749 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:21,749 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:21,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13641 [2021-07-13 19:49:21,950 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:21,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:21,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1277955694, now seen corresponding path program 407 times [2021-07-13 19:49:21,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:21,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548016177] [2021-07-13 19:49:21,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:21,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:22,150 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:22,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:22,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548016177] [2021-07-13 19:49:22,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548016177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:22,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777825980] [2021-07-13 19:49:22,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:22,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:49:22,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:22,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:49:22,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:22,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:22,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777825980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:22,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:22,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:49:22,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802940805] [2021-07-13 19:49:22,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:49:22,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:22,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:49:22,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:49:22,509 INFO L87 Difference]: Start difference. First operand 294 states and 795 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:23,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:23,087 INFO L93 Difference]: Finished difference Result 371 states and 918 transitions. [2021-07-13 19:49:23,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:49:23,087 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:49:23,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:23,088 INFO L225 Difference]: With dead ends: 371 [2021-07-13 19:49:23,088 INFO L226 Difference]: Without dead ends: 364 [2021-07-13 19:49:23,088 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 755.9ms TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:49:23,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-07-13 19:49:23,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 294. [2021-07-13 19:49:23,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.7133105802047783) internal successors, (795), 293 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:23,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 795 transitions. [2021-07-13 19:49:23,092 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 795 transitions. Word has length 18 [2021-07-13 19:49:23,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:23,092 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 795 transitions. [2021-07-13 19:49:23,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:23,092 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 795 transitions. [2021-07-13 19:49:23,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:49:23,092 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:23,092 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:23,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 411 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13676 [2021-07-13 19:49:23,294 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:23,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:23,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1116703916, now seen corresponding path program 408 times [2021-07-13 19:49:23,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:23,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860943464] [2021-07-13 19:49:23,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:23,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:23,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:23,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:23,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860943464] [2021-07-13 19:49:23,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860943464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:23,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799329370] [2021-07-13 19:49:23,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:23,475 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:49:23,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:23,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:49:23,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:23,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:23,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799329370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:23,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:23,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-07-13 19:49:23,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105093785] [2021-07-13 19:49:23,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:49:23,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:23,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:49:23,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:49:23,780 INFO L87 Difference]: Start difference. First operand 294 states and 795 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:24,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:24,091 INFO L93 Difference]: Finished difference Result 334 states and 863 transitions. [2021-07-13 19:49:24,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:49:24,091 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:49:24,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:24,092 INFO L225 Difference]: With dead ends: 334 [2021-07-13 19:49:24,092 INFO L226 Difference]: Without dead ends: 327 [2021-07-13 19:49:24,092 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 395.8ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:49:24,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-07-13 19:49:24,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 298. [2021-07-13 19:49:24,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.7205387205387206) internal successors, (808), 297 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:24,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 808 transitions. [2021-07-13 19:49:24,095 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 808 transitions. Word has length 18 [2021-07-13 19:49:24,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:24,096 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 808 transitions. [2021-07-13 19:49:24,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:24,096 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 808 transitions. [2021-07-13 19:49:24,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:49:24,096 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:24,096 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:24,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13710 [2021-07-13 19:49:24,297 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:24,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:24,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1486678744, now seen corresponding path program 409 times [2021-07-13 19:49:24,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:24,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076436295] [2021-07-13 19:49:24,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:24,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:24,603 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:24,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:24,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076436295] [2021-07-13 19:49:24,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076436295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:24,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124625312] [2021-07-13 19:49:24,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:24,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:24,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:49:24,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:24,984 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:24,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124625312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:24,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:24,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:49:24,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277367822] [2021-07-13 19:49:24,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:49:24,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:24,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:49:24,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:49:24,985 INFO L87 Difference]: Start difference. First operand 298 states and 808 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:25,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:25,566 INFO L93 Difference]: Finished difference Result 336 states and 865 transitions. [2021-07-13 19:49:25,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:49:25,566 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:49:25,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:25,567 INFO L225 Difference]: With dead ends: 336 [2021-07-13 19:49:25,567 INFO L226 Difference]: Without dead ends: 329 [2021-07-13 19:49:25,567 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 830.8ms TimeCoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:49:25,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-07-13 19:49:25,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 297. [2021-07-13 19:49:25,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.7162162162162162) internal successors, (804), 296 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:25,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 804 transitions. [2021-07-13 19:49:25,570 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 804 transitions. Word has length 18 [2021-07-13 19:49:25,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:25,570 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 804 transitions. [2021-07-13 19:49:25,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:25,570 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 804 transitions. [2021-07-13 19:49:25,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:49:25,571 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:25,571 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:25,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13744,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:25,771 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:25,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:25,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1313431052, now seen corresponding path program 410 times [2021-07-13 19:49:25,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:25,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602675820] [2021-07-13 19:49:25,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:25,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:25,949 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:25,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:25,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602675820] [2021-07-13 19:49:25,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602675820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:25,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487964710] [2021-07-13 19:49:25,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:25,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:49:25,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:25,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:49:25,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:26,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:26,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487964710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:26,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:26,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:49:26,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052699603] [2021-07-13 19:49:26,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:49:26,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:26,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:49:26,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:49:26,364 INFO L87 Difference]: Start difference. First operand 297 states and 804 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:26,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:26,979 INFO L93 Difference]: Finished difference Result 323 states and 842 transitions. [2021-07-13 19:49:26,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:49:26,979 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:49:26,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:26,980 INFO L225 Difference]: With dead ends: 323 [2021-07-13 19:49:26,980 INFO L226 Difference]: Without dead ends: 312 [2021-07-13 19:49:26,980 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 758.4ms TimeCoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:49:26,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-07-13 19:49:26,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 297. [2021-07-13 19:49:26,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.7128378378378377) internal successors, (803), 296 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:26,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 803 transitions. [2021-07-13 19:49:26,983 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 803 transitions. Word has length 18 [2021-07-13 19:49:26,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:26,983 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 803 transitions. [2021-07-13 19:49:26,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:26,983 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 803 transitions. [2021-07-13 19:49:26,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:49:26,984 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:26,984 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:27,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13778 [2021-07-13 19:49:27,194 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:27,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:27,194 INFO L82 PathProgramCache]: Analyzing trace with hash -237719896, now seen corresponding path program 411 times [2021-07-13 19:49:27,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:27,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934164819] [2021-07-13 19:49:27,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:27,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:27,353 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:27,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:27,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934164819] [2021-07-13 19:49:27,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934164819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:27,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661904603] [2021-07-13 19:49:27,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:27,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:49:27,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:27,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:49:27,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:27,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:27,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661904603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:27,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:27,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-13 19:49:27,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012290105] [2021-07-13 19:49:27,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:49:27,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:27,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:49:27,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:49:27,734 INFO L87 Difference]: Start difference. First operand 297 states and 803 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:28,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:28,016 INFO L93 Difference]: Finished difference Result 323 states and 843 transitions. [2021-07-13 19:49:28,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:49:28,016 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:49:28,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:28,016 INFO L225 Difference]: With dead ends: 323 [2021-07-13 19:49:28,016 INFO L226 Difference]: Without dead ends: 316 [2021-07-13 19:49:28,017 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 476.2ms TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:28,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-07-13 19:49:28,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 297. [2021-07-13 19:49:28,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.7128378378378377) internal successors, (803), 296 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:28,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 803 transitions. [2021-07-13 19:49:28,020 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 803 transitions. Word has length 18 [2021-07-13 19:49:28,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:28,020 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 803 transitions. [2021-07-13 19:49:28,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:28,020 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 803 transitions. [2021-07-13 19:49:28,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:49:28,020 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:28,020 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:28,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13813 [2021-07-13 19:49:28,221 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:28,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:28,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1250412428, now seen corresponding path program 412 times [2021-07-13 19:49:28,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:28,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823390841] [2021-07-13 19:49:28,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:28,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:28,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:28,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:28,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823390841] [2021-07-13 19:49:28,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823390841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:28,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932553361] [2021-07-13 19:49:28,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:28,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:49:28,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:28,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:49:28,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:28,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:28,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932553361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:28,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:28,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:49:28,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35142932] [2021-07-13 19:49:28,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:49:28,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:28,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:49:28,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:49:28,789 INFO L87 Difference]: Start difference. First operand 297 states and 803 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:29,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:29,056 INFO L93 Difference]: Finished difference Result 321 states and 840 transitions. [2021-07-13 19:49:29,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:49:29,057 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:49:29,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:29,057 INFO L225 Difference]: With dead ends: 321 [2021-07-13 19:49:29,057 INFO L226 Difference]: Without dead ends: 314 [2021-07-13 19:49:29,058 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 477.6ms TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:49:29,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-07-13 19:49:29,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 297. [2021-07-13 19:49:29,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.7128378378378377) internal successors, (803), 296 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:29,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 803 transitions. [2021-07-13 19:49:29,061 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 803 transitions. Word has length 18 [2021-07-13 19:49:29,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:29,061 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 803 transitions. [2021-07-13 19:49:29,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:29,061 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 803 transitions. [2021-07-13 19:49:29,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:49:29,061 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:29,061 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:29,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13847,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:29,262 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:29,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:29,262 INFO L82 PathProgramCache]: Analyzing trace with hash 2031785404, now seen corresponding path program 413 times [2021-07-13 19:49:29,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:29,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307948017] [2021-07-13 19:49:29,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:29,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:29,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:29,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:29,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307948017] [2021-07-13 19:49:29,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307948017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:29,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246041055] [2021-07-13 19:49:29,434 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:29,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:49:29,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:29,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:49:29,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:29,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:29,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246041055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:29,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:29,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-07-13 19:49:29,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237968045] [2021-07-13 19:49:29,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:49:29,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:29,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:49:29,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:49:29,647 INFO L87 Difference]: Start difference. First operand 297 states and 803 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:30,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:30,048 INFO L93 Difference]: Finished difference Result 419 states and 1119 transitions. [2021-07-13 19:49:30,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:49:30,048 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:49:30,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:30,049 INFO L225 Difference]: With dead ends: 419 [2021-07-13 19:49:30,049 INFO L226 Difference]: Without dead ends: 412 [2021-07-13 19:49:30,049 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 487.0ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:49:30,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-07-13 19:49:30,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 302. [2021-07-13 19:49:30,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.7209302325581395) internal successors, (819), 301 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:30,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 819 transitions. [2021-07-13 19:49:30,053 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 819 transitions. Word has length 18 [2021-07-13 19:49:30,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:30,053 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 819 transitions. [2021-07-13 19:49:30,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:30,053 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 819 transitions. [2021-07-13 19:49:30,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:49:30,053 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:30,053 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:30,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13882,417 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:30,254 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:30,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:30,254 INFO L82 PathProgramCache]: Analyzing trace with hash -571597256, now seen corresponding path program 414 times [2021-07-13 19:49:30,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:30,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279871324] [2021-07-13 19:49:30,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:30,431 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:30,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:30,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279871324] [2021-07-13 19:49:30,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279871324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:30,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497503325] [2021-07-13 19:49:30,432 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:30,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:49:30,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:30,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:49:30,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:30,638 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:30,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497503325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:30,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:30,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-07-13 19:49:30,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135905553] [2021-07-13 19:49:30,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:49:30,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:30,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:49:30,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:49:30,639 INFO L87 Difference]: Start difference. First operand 302 states and 819 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:31,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:31,017 INFO L93 Difference]: Finished difference Result 421 states and 1121 transitions. [2021-07-13 19:49:31,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:49:31,017 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:49:31,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:31,018 INFO L225 Difference]: With dead ends: 421 [2021-07-13 19:49:31,018 INFO L226 Difference]: Without dead ends: 414 [2021-07-13 19:49:31,018 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 471.5ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:49:31,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-07-13 19:49:31,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 301. [2021-07-13 19:49:31,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.716666666666667) internal successors, (815), 300 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:31,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 815 transitions. [2021-07-13 19:49:31,022 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 815 transitions. Word has length 18 [2021-07-13 19:49:31,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:31,022 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 815 transitions. [2021-07-13 19:49:31,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:31,022 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 815 transitions. [2021-07-13 19:49:31,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:49:31,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:31,022 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:31,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13892,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:31,223 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:31,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:31,223 INFO L82 PathProgramCache]: Analyzing trace with hash -398349564, now seen corresponding path program 415 times [2021-07-13 19:49:31,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:31,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44565702] [2021-07-13 19:49:31,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:31,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:31,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:31,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:31,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44565702] [2021-07-13 19:49:31,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44565702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:31,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5810389] [2021-07-13 19:49:31,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:31,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:31,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:49:31,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:31,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5810389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:31,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:31,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-07-13 19:49:31,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020725064] [2021-07-13 19:49:31,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:49:31,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:31,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:49:31,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:49:31,664 INFO L87 Difference]: Start difference. First operand 301 states and 815 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:31,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:31,989 INFO L93 Difference]: Finished difference Result 408 states and 1100 transitions. [2021-07-13 19:49:31,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:49:31,990 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:49:31,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:31,990 INFO L225 Difference]: With dead ends: 408 [2021-07-13 19:49:31,994 INFO L226 Difference]: Without dead ends: 401 [2021-07-13 19:49:31,994 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 487.5ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:31,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-07-13 19:49:31,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 300. [2021-07-13 19:49:31,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.7157190635451505) internal successors, (812), 299 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:31,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 812 transitions. [2021-07-13 19:49:31,997 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 812 transitions. Word has length 18 [2021-07-13 19:49:31,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:31,997 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 812 transitions. [2021-07-13 19:49:31,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:31,997 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 812 transitions. [2021-07-13 19:49:31,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:49:31,998 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:31,998 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:32,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13904 [2021-07-13 19:49:32,198 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:32,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:32,199 INFO L82 PathProgramCache]: Analyzing trace with hash 677361592, now seen corresponding path program 416 times [2021-07-13 19:49:32,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:32,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993723984] [2021-07-13 19:49:32,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:32,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:32,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:32,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:32,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993723984] [2021-07-13 19:49:32,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993723984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:32,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935192655] [2021-07-13 19:49:32,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:32,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:49:32,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:32,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:49:32,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:32,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:32,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:32,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:49:32,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:32,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:32,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:32,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-13 19:49:32,920 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:32,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:32,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:32,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-13 19:49:32,927 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:32,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:32,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:32,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-13 19:49:32,935 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:32,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:32,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:32,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-07-13 19:49:32,942 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:32,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:32,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-13 19:49:32,949 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:33,135 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 64 [2021-07-13 19:49:33,136 INFO L628 ElimStorePlain]: treesize reduction 908, result has 12.6 percent of original size [2021-07-13 19:49:33,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:49:33,140 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:33,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:33,181 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:49:33,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:49:33,185 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:33,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:33,227 INFO L518 ElimStorePlain]: Eliminatee v_prenex_400 vanished before elimination [2021-07-13 19:49:33,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:49:33,231 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:33,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:33,267 INFO L518 ElimStorePlain]: Eliminatee v_prenex_402 vanished before elimination [2021-07-13 19:49:33,267 INFO L518 ElimStorePlain]: Eliminatee v_prenex_403 vanished before elimination [2021-07-13 19:49:33,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:49:33,269 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1201, output treesize:77 [2021-07-13 19:49:33,376 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:33,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935192655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:33,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:33,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:49:33,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357283252] [2021-07-13 19:49:33,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:49:33,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:33,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:49:33,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:49:33,377 INFO L87 Difference]: Start difference. First operand 300 states and 812 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:33,654 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 76 [2021-07-13 19:49:33,793 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 85 [2021-07-13 19:49:34,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:34,030 INFO L93 Difference]: Finished difference Result 407 states and 1097 transitions. [2021-07-13 19:49:34,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:49:34,030 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:49:34,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:34,031 INFO L225 Difference]: With dead ends: 407 [2021-07-13 19:49:34,031 INFO L226 Difference]: Without dead ends: 400 [2021-07-13 19:49:34,031 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 977.2ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:49:34,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-07-13 19:49:34,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 299. [2021-07-13 19:49:34,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.714765100671141) internal successors, (809), 298 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:34,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 809 transitions. [2021-07-13 19:49:34,035 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 809 transitions. Word has length 18 [2021-07-13 19:49:34,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:34,035 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 809 transitions. [2021-07-13 19:49:34,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:34,035 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 809 transitions. [2021-07-13 19:49:34,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:49:34,035 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:34,036 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:34,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13918,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:34,236 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:34,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:34,236 INFO L82 PathProgramCache]: Analyzing trace with hash -335330940, now seen corresponding path program 417 times [2021-07-13 19:49:34,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:34,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080083394] [2021-07-13 19:49:34,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:34,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:34,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:34,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:34,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080083394] [2021-07-13 19:49:34,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080083394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:34,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678467241] [2021-07-13 19:49:34,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:34,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:49:34,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:34,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:49:34,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:34,638 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:34,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678467241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:34,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:34,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-07-13 19:49:34,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582639772] [2021-07-13 19:49:34,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:49:34,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:34,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:49:34,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:49:34,639 INFO L87 Difference]: Start difference. First operand 299 states and 809 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:35,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:35,065 INFO L93 Difference]: Finished difference Result 406 states and 1094 transitions. [2021-07-13 19:49:35,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:49:35,065 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:49:35,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:35,065 INFO L225 Difference]: With dead ends: 406 [2021-07-13 19:49:35,065 INFO L226 Difference]: Without dead ends: 399 [2021-07-13 19:49:35,066 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 567.6ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:49:35,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-07-13 19:49:35,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 298. [2021-07-13 19:49:35,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.7138047138047137) internal successors, (806), 297 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:35,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 806 transitions. [2021-07-13 19:49:35,069 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 806 transitions. Word has length 18 [2021-07-13 19:49:35,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:35,069 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 806 transitions. [2021-07-13 19:49:35,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:35,069 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 806 transitions. [2021-07-13 19:49:35,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:49:35,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:35,070 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:35,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13966 [2021-07-13 19:49:35,270 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:35,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:35,271 INFO L82 PathProgramCache]: Analyzing trace with hash -180893422, now seen corresponding path program 418 times [2021-07-13 19:49:35,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:35,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193761491] [2021-07-13 19:49:35,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:35,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:35,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:35,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:35,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193761491] [2021-07-13 19:49:35,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193761491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:35,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038259434] [2021-07-13 19:49:35,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:35,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:49:35,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:35,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:49:35,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:35,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:35,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038259434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:35,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:35,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-07-13 19:49:35,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888748973] [2021-07-13 19:49:35,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:49:35,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:35,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:49:35,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:49:35,641 INFO L87 Difference]: Start difference. First operand 298 states and 806 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:36,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:36,140 INFO L93 Difference]: Finished difference Result 403 states and 1088 transitions. [2021-07-13 19:49:36,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:49:36,141 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:49:36,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:36,141 INFO L225 Difference]: With dead ends: 403 [2021-07-13 19:49:36,141 INFO L226 Difference]: Without dead ends: 396 [2021-07-13 19:49:36,141 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 610.5ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:49:36,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-07-13 19:49:36,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 300. [2021-07-13 19:49:36,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.705685618729097) internal successors, (809), 299 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:36,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 809 transitions. [2021-07-13 19:49:36,145 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 809 transitions. Word has length 18 [2021-07-13 19:49:36,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:36,145 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 809 transitions. [2021-07-13 19:49:36,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:36,145 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 809 transitions. [2021-07-13 19:49:36,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:49:36,146 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:36,146 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:36,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13978,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:36,346 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:36,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:36,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1160331542, now seen corresponding path program 419 times [2021-07-13 19:49:36,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:36,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344824740] [2021-07-13 19:49:36,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:36,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:36,432 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:36,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:36,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344824740] [2021-07-13 19:49:36,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344824740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:36,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433863605] [2021-07-13 19:49:36,432 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:36,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:49:36,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:36,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:49:36,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:36,622 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:36,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433863605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:36,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:36,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-13 19:49:36,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837874808] [2021-07-13 19:49:36,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:49:36,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:36,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:49:36,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:49:36,623 INFO L87 Difference]: Start difference. First operand 300 states and 809 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:37,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:37,020 INFO L93 Difference]: Finished difference Result 390 states and 1055 transitions. [2021-07-13 19:49:37,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:49:37,021 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:49:37,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:37,021 INFO L225 Difference]: With dead ends: 390 [2021-07-13 19:49:37,021 INFO L226 Difference]: Without dead ends: 373 [2021-07-13 19:49:37,021 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 429.7ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:49:37,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-07-13 19:49:37,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 295. [2021-07-13 19:49:37,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.7176870748299318) internal successors, (799), 294 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:37,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 799 transitions. [2021-07-13 19:49:37,025 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 799 transitions. Word has length 19 [2021-07-13 19:49:37,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:37,025 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 799 transitions. [2021-07-13 19:49:37,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:37,025 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 799 transitions. [2021-07-13 19:49:37,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:49:37,025 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:37,025 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:37,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13995 [2021-07-13 19:49:37,226 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:37,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:37,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1541559239, now seen corresponding path program 420 times [2021-07-13 19:49:37,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:37,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956602415] [2021-07-13 19:49:37,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:37,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:37,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:37,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:37,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956602415] [2021-07-13 19:49:37,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956602415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:37,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206794080] [2021-07-13 19:49:37,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:37,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:49:37,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:37,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:49:37,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:37,466 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:37,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206794080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:37,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:37,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-13 19:49:37,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721340343] [2021-07-13 19:49:37,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:49:37,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:37,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:49:37,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:49:37,467 INFO L87 Difference]: Start difference. First operand 295 states and 799 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:37,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:37,732 INFO L93 Difference]: Finished difference Result 389 states and 1060 transitions. [2021-07-13 19:49:37,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:37,732 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:49:37,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:37,733 INFO L225 Difference]: With dead ends: 389 [2021-07-13 19:49:37,733 INFO L226 Difference]: Without dead ends: 389 [2021-07-13 19:49:37,733 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 277.4ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:49:37,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-07-13 19:49:37,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 296. [2021-07-13 19:49:37,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.7186440677966104) internal successors, (802), 295 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:37,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 802 transitions. [2021-07-13 19:49:37,736 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 802 transitions. Word has length 19 [2021-07-13 19:49:37,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:37,736 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 802 transitions. [2021-07-13 19:49:37,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:37,736 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 802 transitions. [2021-07-13 19:49:37,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:49:37,737 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:37,737 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:37,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14001,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:37,937 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:37,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:37,938 INFO L82 PathProgramCache]: Analyzing trace with hash -839322326, now seen corresponding path program 421 times [2021-07-13 19:49:37,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:37,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837003713] [2021-07-13 19:49:37,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:37,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:38,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:38,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:38,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837003713] [2021-07-13 19:49:38,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837003713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:38,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701771438] [2021-07-13 19:49:38,029 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:38,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:38,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:49:38,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:38,377 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:49:38,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:38,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:38,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:49:38,381 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:38,416 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:49:38,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:49:38,419 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:38,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:38,432 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:49:38,432 INFO L518 ElimStorePlain]: Eliminatee v_prenex_414 vanished before elimination [2021-07-13 19:49:38,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:49:38,433 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:49:38,462 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:38,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701771438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:38,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:38,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:49:38,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921094680] [2021-07-13 19:49:38,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:49:38,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:38,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:49:38,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:49:38,463 INFO L87 Difference]: Start difference. First operand 296 states and 802 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:38,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:38,944 INFO L93 Difference]: Finished difference Result 390 states and 1056 transitions. [2021-07-13 19:49:38,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:49:38,945 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:49:38,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:38,945 INFO L225 Difference]: With dead ends: 390 [2021-07-13 19:49:38,945 INFO L226 Difference]: Without dead ends: 378 [2021-07-13 19:49:38,945 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 568.2ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:49:38,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-07-13 19:49:38,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 297. [2021-07-13 19:49:38,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.7162162162162162) internal successors, (804), 296 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:38,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 804 transitions. [2021-07-13 19:49:38,949 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 804 transitions. Word has length 19 [2021-07-13 19:49:38,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:38,949 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 804 transitions. [2021-07-13 19:49:38,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:38,949 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 804 transitions. [2021-07-13 19:49:38,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:49:38,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:38,949 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:39,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14004 [2021-07-13 19:49:39,150 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:39,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:39,150 INFO L82 PathProgramCache]: Analyzing trace with hash -625250165, now seen corresponding path program 422 times [2021-07-13 19:49:39,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:39,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628733303] [2021-07-13 19:49:39,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:39,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:39,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:39,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628733303] [2021-07-13 19:49:39,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628733303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:39,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930934286] [2021-07-13 19:49:39,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:39,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:49:39,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:39,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:49:39,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:39,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:39,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:39,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:49:39,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:39,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:39,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:49:39,416 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:39,437 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:49:39,437 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:49:39,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:49:39,438 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:49:39,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:39,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930934286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:39,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:39,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:49:39,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928023827] [2021-07-13 19:49:39,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:49:39,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:39,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:49:39,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:49:39,460 INFO L87 Difference]: Start difference. First operand 297 states and 804 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:39,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:39,724 INFO L93 Difference]: Finished difference Result 338 states and 882 transitions. [2021-07-13 19:49:39,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:39,724 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:49:39,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:39,725 INFO L225 Difference]: With dead ends: 338 [2021-07-13 19:49:39,725 INFO L226 Difference]: Without dead ends: 338 [2021-07-13 19:49:39,725 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 256.4ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:49:39,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-07-13 19:49:39,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 297. [2021-07-13 19:49:39,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.7162162162162162) internal successors, (804), 296 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:39,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 804 transitions. [2021-07-13 19:49:39,728 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 804 transitions. Word has length 19 [2021-07-13 19:49:39,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:39,728 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 804 transitions. [2021-07-13 19:49:39,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:39,728 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 804 transitions. [2021-07-13 19:49:39,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:49:39,729 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:39,729 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:39,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14021,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:39,929 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:39,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:39,930 INFO L82 PathProgramCache]: Analyzing trace with hash 20163430, now seen corresponding path program 423 times [2021-07-13 19:49:39,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:39,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410458835] [2021-07-13 19:49:39,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:39,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:40,021 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:40,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:40,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410458835] [2021-07-13 19:49:40,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410458835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:40,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468645407] [2021-07-13 19:49:40,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:40,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:49:40,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:40,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:49:40,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:40,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:40,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:40,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:49:40,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:40,400 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:49:40,401 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:40,435 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:49:40,435 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:49:40,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:49:40,438 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:40,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:40,451 INFO L518 ElimStorePlain]: Eliminatee v_prenex_422 vanished before elimination [2021-07-13 19:49:40,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:49:40,452 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:49:40,480 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:40,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468645407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:40,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:40,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:49:40,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883676165] [2021-07-13 19:49:40,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:49:40,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:40,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:49:40,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:49:40,481 INFO L87 Difference]: Start difference. First operand 297 states and 804 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:40,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:40,972 INFO L93 Difference]: Finished difference Result 388 states and 1053 transitions. [2021-07-13 19:49:40,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:49:40,972 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:49:40,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:40,973 INFO L225 Difference]: With dead ends: 388 [2021-07-13 19:49:40,973 INFO L226 Difference]: Without dead ends: 379 [2021-07-13 19:49:40,973 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 568.4ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:49:40,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-07-13 19:49:40,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 298. [2021-07-13 19:49:40,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.7138047138047137) internal successors, (806), 297 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:40,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 806 transitions. [2021-07-13 19:49:40,977 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 806 transitions. Word has length 19 [2021-07-13 19:49:40,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:40,977 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 806 transitions. [2021-07-13 19:49:40,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:40,977 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 806 transitions. [2021-07-13 19:49:40,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:49:40,977 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:40,978 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:41,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14025,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:41,200 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:41,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:41,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1551089637, now seen corresponding path program 424 times [2021-07-13 19:49:41,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:41,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752908326] [2021-07-13 19:49:41,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:41,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:41,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:41,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752908326] [2021-07-13 19:49:41,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752908326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:41,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320960602] [2021-07-13 19:49:41,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:41,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:49:41,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:41,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:49:41,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:41,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:41,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:41,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:49:41,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:41,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:41,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:49:41,481 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:41,502 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:49:41,503 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:49:41,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:49:41,503 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:49:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:41,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320960602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:41,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:41,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:49:41,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749643485] [2021-07-13 19:49:41,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:49:41,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:41,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:49:41,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:49:41,525 INFO L87 Difference]: Start difference. First operand 298 states and 806 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:41,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:41,708 INFO L93 Difference]: Finished difference Result 335 states and 876 transitions. [2021-07-13 19:49:41,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:41,709 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:49:41,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:41,709 INFO L225 Difference]: With dead ends: 335 [2021-07-13 19:49:41,709 INFO L226 Difference]: Without dead ends: 335 [2021-07-13 19:49:41,709 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 247.6ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:49:41,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-07-13 19:49:41,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 298. [2021-07-13 19:49:41,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.7138047138047137) internal successors, (806), 297 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:41,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 806 transitions. [2021-07-13 19:49:41,713 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 806 transitions. Word has length 19 [2021-07-13 19:49:41,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:41,713 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 806 transitions. [2021-07-13 19:49:41,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:41,713 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 806 transitions. [2021-07-13 19:49:41,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:49:41,713 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:41,713 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:41,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14051,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:41,914 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:41,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:41,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1156267434, now seen corresponding path program 425 times [2021-07-13 19:49:41,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:41,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716510482] [2021-07-13 19:49:41,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:41,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:42,000 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:42,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:42,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716510482] [2021-07-13 19:49:42,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716510482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:42,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487423167] [2021-07-13 19:49:42,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:42,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:49:42,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:42,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:49:42,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:42,355 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:49:42,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:42,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:42,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:49:42,359 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:42,394 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:49:42,394 INFO L518 ElimStorePlain]: Eliminatee v_prenex_428 vanished before elimination [2021-07-13 19:49:42,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:49:42,397 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:42,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:42,410 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:49:42,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:49:42,411 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:49:42,439 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:42,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487423167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:42,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:42,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:49:42,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091862487] [2021-07-13 19:49:42,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:49:42,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:42,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:49:42,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:49:42,440 INFO L87 Difference]: Start difference. First operand 298 states and 806 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:42,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:42,904 INFO L93 Difference]: Finished difference Result 386 states and 1050 transitions. [2021-07-13 19:49:42,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:49:42,905 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:49:42,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:42,905 INFO L225 Difference]: With dead ends: 386 [2021-07-13 19:49:42,905 INFO L226 Difference]: Without dead ends: 380 [2021-07-13 19:49:42,905 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 547.6ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:49:42,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-07-13 19:49:42,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 298. [2021-07-13 19:49:42,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.7138047138047137) internal successors, (806), 297 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:42,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 806 transitions. [2021-07-13 19:49:42,910 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 806 transitions. Word has length 19 [2021-07-13 19:49:42,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:42,910 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 806 transitions. [2021-07-13 19:49:42,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:42,910 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 806 transitions. [2021-07-13 19:49:42,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:49:42,911 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:42,911 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:43,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14055,429 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:43,125 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:43,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:43,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1898388811, now seen corresponding path program 426 times [2021-07-13 19:49:43,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:43,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508516848] [2021-07-13 19:49:43,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:43,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:43,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:43,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:43,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508516848] [2021-07-13 19:49:43,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508516848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:43,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479938387] [2021-07-13 19:49:43,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:43,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:49:43,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:43,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:49:43,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:43,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:43,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:43,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:49:43,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:43,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:43,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:49:43,411 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:43,432 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:49:43,432 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:49:43,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:49:43,433 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:49:43,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:43,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479938387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:43,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:43,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:49:43,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482335214] [2021-07-13 19:49:43,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:49:43,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:43,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:49:43,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:49:43,455 INFO L87 Difference]: Start difference. First operand 298 states and 806 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:43,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:43,659 INFO L93 Difference]: Finished difference Result 332 states and 870 transitions. [2021-07-13 19:49:43,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:43,659 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:49:43,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:43,660 INFO L225 Difference]: With dead ends: 332 [2021-07-13 19:49:43,660 INFO L226 Difference]: Without dead ends: 332 [2021-07-13 19:49:43,660 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 236.0ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:43,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-07-13 19:49:43,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 299. [2021-07-13 19:49:43,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.7114093959731544) internal successors, (808), 298 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:43,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 808 transitions. [2021-07-13 19:49:43,663 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 808 transitions. Word has length 19 [2021-07-13 19:49:43,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:43,663 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 808 transitions. [2021-07-13 19:49:43,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:43,663 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 808 transitions. [2021-07-13 19:49:43,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:49:43,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:43,664 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:43,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14082,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:43,865 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:43,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:43,865 INFO L82 PathProgramCache]: Analyzing trace with hash 915821286, now seen corresponding path program 427 times [2021-07-13 19:49:43,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:43,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655343297] [2021-07-13 19:49:43,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:43,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:43,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:43,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:43,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655343297] [2021-07-13 19:49:43,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655343297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:43,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996946249] [2021-07-13 19:49:43,949 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:43,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:43,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:49:43,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:44,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:49:44,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:44,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:44,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:49:44,195 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:44,235 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-07-13 19:49:44,235 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:49:44,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:49:44,238 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:44,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:44,252 INFO L518 ElimStorePlain]: Eliminatee v_prenex_432 vanished before elimination [2021-07-13 19:49:44,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:49:44,253 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:49:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:44,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996946249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:44,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:44,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:49:44,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636826523] [2021-07-13 19:49:44,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:49:44,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:44,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:49:44,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:49:44,315 INFO L87 Difference]: Start difference. First operand 299 states and 808 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:45,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:45,393 INFO L93 Difference]: Finished difference Result 407 states and 1087 transitions. [2021-07-13 19:49:45,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:49:45,393 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:49:45,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:45,394 INFO L225 Difference]: With dead ends: 407 [2021-07-13 19:49:45,394 INFO L226 Difference]: Without dead ends: 404 [2021-07-13 19:49:45,394 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1086.5ms TimeCoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:49:45,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-07-13 19:49:45,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 301. [2021-07-13 19:49:45,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.716666666666667) internal successors, (815), 300 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:45,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 815 transitions. [2021-07-13 19:49:45,397 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 815 transitions. Word has length 19 [2021-07-13 19:49:45,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:45,398 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 815 transitions. [2021-07-13 19:49:45,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:45,398 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 815 transitions. [2021-07-13 19:49:45,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:49:45,398 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:45,398 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:45,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14086 [2021-07-13 19:49:45,599 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:45,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:45,599 INFO L82 PathProgramCache]: Analyzing trace with hash 662666021, now seen corresponding path program 428 times [2021-07-13 19:49:45,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:45,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006594653] [2021-07-13 19:49:45,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:45,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:45,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:45,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006594653] [2021-07-13 19:49:45,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006594653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:45,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044379011] [2021-07-13 19:49:45,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:45,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:49:45,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:45,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:49:45,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:45,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:45,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:45,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:49:45,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:45,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:45,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:49:45,867 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:45,892 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:49:45,892 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:49:45,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:49:45,893 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:49:45,938 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:45,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044379011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:45,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:45,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:49:45,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096219115] [2021-07-13 19:49:45,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:49:45,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:45,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:49:45,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:49:45,939 INFO L87 Difference]: Start difference. First operand 301 states and 815 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:46,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:46,361 INFO L93 Difference]: Finished difference Result 357 states and 915 transitions. [2021-07-13 19:49:46,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:49:46,361 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:49:46,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:46,361 INFO L225 Difference]: With dead ends: 357 [2021-07-13 19:49:46,361 INFO L226 Difference]: Without dead ends: 357 [2021-07-13 19:49:46,362 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 460.2ms TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:49:46,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-07-13 19:49:46,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 301. [2021-07-13 19:49:46,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.716666666666667) internal successors, (815), 300 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:46,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 815 transitions. [2021-07-13 19:49:46,365 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 815 transitions. Word has length 19 [2021-07-13 19:49:46,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:46,365 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 815 transitions. [2021-07-13 19:49:46,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:46,365 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 815 transitions. [2021-07-13 19:49:46,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:49:46,365 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:46,365 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:46,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14099,432 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:46,566 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:46,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:46,566 INFO L82 PathProgramCache]: Analyzing trace with hash 215328298, now seen corresponding path program 429 times [2021-07-13 19:49:46,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:46,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056149108] [2021-07-13 19:49:46,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:46,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:46,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:46,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:46,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056149108] [2021-07-13 19:49:46,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056149108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:46,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986714455] [2021-07-13 19:49:46,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:46,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:49:46,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:46,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:49:46,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:46,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:46,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:46,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:49:46,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:46,909 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:49:46,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:46,945 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-07-13 19:49:46,945 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:49:46,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:49:46,948 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:46,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:46,962 INFO L518 ElimStorePlain]: Eliminatee v_prenex_436 vanished before elimination [2021-07-13 19:49:46,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:49:46,963 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:49:47,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:47,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986714455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:47,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:47,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:49:47,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249429286] [2021-07-13 19:49:47,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:49:47,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:47,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:49:47,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:49:47,018 INFO L87 Difference]: Start difference. First operand 301 states and 815 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:47,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:47,528 INFO L93 Difference]: Finished difference Result 392 states and 1066 transitions. [2021-07-13 19:49:47,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:49:47,528 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:49:47,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:47,529 INFO L225 Difference]: With dead ends: 392 [2021-07-13 19:49:47,529 INFO L226 Difference]: Without dead ends: 392 [2021-07-13 19:49:47,529 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 529.4ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:49:47,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-07-13 19:49:47,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 300. [2021-07-13 19:49:47,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.7123745819397995) internal successors, (811), 299 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:47,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 811 transitions. [2021-07-13 19:49:47,533 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 811 transitions. Word has length 19 [2021-07-13 19:49:47,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:47,533 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 811 transitions. [2021-07-13 19:49:47,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:47,533 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 811 transitions. [2021-07-13 19:49:47,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:49:47,533 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:47,533 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:47,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14107 [2021-07-13 19:49:47,734 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:47,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:47,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1767468947, now seen corresponding path program 430 times [2021-07-13 19:49:47,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:47,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124382417] [2021-07-13 19:49:47,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:47,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:47,819 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:47,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:47,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124382417] [2021-07-13 19:49:47,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124382417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:47,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161995162] [2021-07-13 19:49:47,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:47,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:49:47,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:47,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:49:47,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:47,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:47,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:47,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:49:47,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:47,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:47,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:49:47,997 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:48,022 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:49:48,023 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:49:48,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:49:48,023 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:49:48,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:48,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161995162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:48,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:48,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:49:48,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731776486] [2021-07-13 19:49:48,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:49:48,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:48,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:49:48,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:49:48,091 INFO L87 Difference]: Start difference. First operand 300 states and 811 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:48,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:48,594 INFO L93 Difference]: Finished difference Result 334 states and 873 transitions. [2021-07-13 19:49:48,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:49:48,594 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:49:48,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:48,595 INFO L225 Difference]: With dead ends: 334 [2021-07-13 19:49:48,595 INFO L226 Difference]: Without dead ends: 332 [2021-07-13 19:49:48,595 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 524.1ms TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:49:48,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-07-13 19:49:48,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 300. [2021-07-13 19:49:48,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.709030100334448) internal successors, (810), 299 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:48,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 810 transitions. [2021-07-13 19:49:48,598 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 810 transitions. Word has length 19 [2021-07-13 19:49:48,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:48,598 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 810 transitions. [2021-07-13 19:49:48,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:48,598 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 810 transitions. [2021-07-13 19:49:48,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:49:48,599 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:48,599 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:48,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14124,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:48,821 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:48,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:48,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1475445976, now seen corresponding path program 431 times [2021-07-13 19:49:48,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:48,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085247714] [2021-07-13 19:49:48,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:48,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:48,903 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:48,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:48,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085247714] [2021-07-13 19:49:48,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085247714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:48,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562689236] [2021-07-13 19:49:48,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:48,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:49:48,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:48,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:49:48,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:49,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:49,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:49,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:49:49,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:49,229 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:49:49,229 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:49,265 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:49:49,265 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:49:49,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:49:49,268 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:49,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:49,281 INFO L518 ElimStorePlain]: Eliminatee v_prenex_441 vanished before elimination [2021-07-13 19:49:49,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:49:49,282 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:49:49,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:49,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562689236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:49,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:49,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:49:49,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375374667] [2021-07-13 19:49:49,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:49:49,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:49,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:49:49,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:49:49,326 INFO L87 Difference]: Start difference. First operand 300 states and 810 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:49,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:49,582 INFO L93 Difference]: Finished difference Result 319 states and 839 transitions. [2021-07-13 19:49:49,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:49:49,582 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:49:49,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:49,583 INFO L225 Difference]: With dead ends: 319 [2021-07-13 19:49:49,583 INFO L226 Difference]: Without dead ends: 307 [2021-07-13 19:49:49,583 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 344.4ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:49:49,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-07-13 19:49:49,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 300. [2021-07-13 19:49:49,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.705685618729097) internal successors, (809), 299 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:49,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 809 transitions. [2021-07-13 19:49:49,586 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 809 transitions. Word has length 19 [2021-07-13 19:49:49,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:49,586 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 809 transitions. [2021-07-13 19:49:49,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:49,586 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 809 transitions. [2021-07-13 19:49:49,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:49:49,587 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:49,587 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:49,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14135,435 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:49,787 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:49,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:49,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1689518137, now seen corresponding path program 432 times [2021-07-13 19:49:49,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:49,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059043664] [2021-07-13 19:49:49,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:49,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:49,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:49,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:49,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059043664] [2021-07-13 19:49:49,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059043664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:49,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603972213] [2021-07-13 19:49:49,871 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:49,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:49:49,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:49,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:49:49,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:50,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:50,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:50,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:49:50,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:50,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:50,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:49:50,048 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:50,069 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:49:50,069 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:49:50,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:49:50,070 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:49:50,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:50,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603972213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:50,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:50,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:49:50,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228783684] [2021-07-13 19:49:50,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:49:50,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:50,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:49:50,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:49:50,092 INFO L87 Difference]: Start difference. First operand 300 states and 809 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:50,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:50,281 INFO L93 Difference]: Finished difference Result 323 states and 853 transitions. [2021-07-13 19:49:50,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:50,281 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:49:50,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:50,281 INFO L225 Difference]: With dead ends: 323 [2021-07-13 19:49:50,281 INFO L226 Difference]: Without dead ends: 323 [2021-07-13 19:49:50,282 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 193.3ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:49:50,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-07-13 19:49:50,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 300. [2021-07-13 19:49:50,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.705685618729097) internal successors, (809), 299 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:50,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 809 transitions. [2021-07-13 19:49:50,285 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 809 transitions. Word has length 19 [2021-07-13 19:49:50,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:50,285 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 809 transitions. [2021-07-13 19:49:50,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:50,285 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 809 transitions. [2021-07-13 19:49:50,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:49:50,285 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:50,285 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:50,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14152,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:50,486 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:50,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:50,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1960035564, now seen corresponding path program 433 times [2021-07-13 19:49:50,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:50,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814438848] [2021-07-13 19:49:50,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:50,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:50,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:50,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814438848] [2021-07-13 19:49:50,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814438848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:50,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107818124] [2021-07-13 19:49:50,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:50,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:50,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:49:50,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:50,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:50,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:50,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:49:50,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:50,906 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:49:50,907 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:50,943 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:49:50,943 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:49:50,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:49:50,946 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:50,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:50,959 INFO L518 ElimStorePlain]: Eliminatee v_prenex_447 vanished before elimination [2021-07-13 19:49:50,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:49:50,960 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:49:50,988 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:50,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107818124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:50,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:50,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:49:50,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286747610] [2021-07-13 19:49:50,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:49:50,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:50,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:49:50,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:49:50,989 INFO L87 Difference]: Start difference. First operand 300 states and 809 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:51,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:51,238 INFO L93 Difference]: Finished difference Result 316 states and 833 transitions. [2021-07-13 19:49:51,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:49:51,238 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:49:51,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:51,238 INFO L225 Difference]: With dead ends: 316 [2021-07-13 19:49:51,238 INFO L226 Difference]: Without dead ends: 307 [2021-07-13 19:49:51,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 345.5ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:49:51,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-07-13 19:49:51,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 300. [2021-07-13 19:49:51,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.702341137123746) internal successors, (808), 299 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:51,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 808 transitions. [2021-07-13 19:49:51,242 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 808 transitions. Word has length 19 [2021-07-13 19:49:51,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:51,242 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 808 transitions. [2021-07-13 19:49:51,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:51,242 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 808 transitions. [2021-07-13 19:49:51,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:49:51,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:51,243 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:51,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14156,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:51,460 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:51,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:51,460 INFO L82 PathProgramCache]: Analyzing trace with hash -429109357, now seen corresponding path program 434 times [2021-07-13 19:49:51,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:51,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388485068] [2021-07-13 19:49:51,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:51,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:51,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:51,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:51,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388485068] [2021-07-13 19:49:51,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388485068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:51,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041443020] [2021-07-13 19:49:51,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:51,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:49:51,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:51,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:49:51,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:51,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:51,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:51,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:49:51,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:51,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:51,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:49:51,726 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:51,747 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:49:51,748 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:49:51,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:49:51,748 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:49:51,770 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:51,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041443020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:51,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:51,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:49:51,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799739669] [2021-07-13 19:49:51,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:49:51,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:51,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:49:51,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:49:51,771 INFO L87 Difference]: Start difference. First operand 300 states and 808 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:51,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:51,931 INFO L93 Difference]: Finished difference Result 339 states and 884 transitions. [2021-07-13 19:49:51,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:51,931 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:49:51,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:51,931 INFO L225 Difference]: With dead ends: 339 [2021-07-13 19:49:51,932 INFO L226 Difference]: Without dead ends: 339 [2021-07-13 19:49:51,932 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 201.0ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:49:51,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-07-13 19:49:51,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 300. [2021-07-13 19:49:51,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.702341137123746) internal successors, (808), 299 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:51,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 808 transitions. [2021-07-13 19:49:51,935 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 808 transitions. Word has length 19 [2021-07-13 19:49:51,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:51,935 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 808 transitions. [2021-07-13 19:49:51,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:51,935 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 808 transitions. [2021-07-13 19:49:51,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:49:51,936 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:51,936 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:52,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14182 [2021-07-13 19:49:52,136 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:52,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:52,136 INFO L82 PathProgramCache]: Analyzing trace with hash -823931560, now seen corresponding path program 435 times [2021-07-13 19:49:52,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:52,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839648239] [2021-07-13 19:49:52,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:52,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:52,219 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:52,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:52,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839648239] [2021-07-13 19:49:52,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839648239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:52,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072900337] [2021-07-13 19:49:52,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:52,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:49:52,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:52,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:49:52,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:52,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:52,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:52,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:49:52,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:52,519 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:49:52,519 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:52,554 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:49:52,554 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:49:52,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:49:52,557 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:52,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:52,570 INFO L518 ElimStorePlain]: Eliminatee v_prenex_451 vanished before elimination [2021-07-13 19:49:52,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:49:52,571 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:49:52,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:52,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072900337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:52,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:52,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:49:52,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823552161] [2021-07-13 19:49:52,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:49:52,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:52,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:49:52,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:49:52,600 INFO L87 Difference]: Start difference. First operand 300 states and 808 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:52,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:52,865 INFO L93 Difference]: Finished difference Result 313 states and 827 transitions. [2021-07-13 19:49:52,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:49:52,865 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:49:52,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:52,866 INFO L225 Difference]: With dead ends: 313 [2021-07-13 19:49:52,866 INFO L226 Difference]: Without dead ends: 307 [2021-07-13 19:49:52,866 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 329.6ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:49:52,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-07-13 19:49:52,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 300. [2021-07-13 19:49:52,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.698996655518395) internal successors, (807), 299 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:52,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 807 transitions. [2021-07-13 19:49:52,869 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 807 transitions. Word has length 19 [2021-07-13 19:49:52,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:52,869 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 807 transitions. [2021-07-13 19:49:52,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:52,869 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 807 transitions. [2021-07-13 19:49:52,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:49:52,870 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:52,870 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:53,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14186,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:53,070 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:53,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:53,071 INFO L82 PathProgramCache]: Analyzing trace with hash -81810183, now seen corresponding path program 436 times [2021-07-13 19:49:53,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:53,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721315916] [2021-07-13 19:49:53,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:53,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:53,154 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:53,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:53,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721315916] [2021-07-13 19:49:53,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721315916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:53,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042888038] [2021-07-13 19:49:53,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:53,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:49:53,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:53,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:49:53,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:53,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:53,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:53,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:49:53,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:53,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:53,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:49:53,358 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:53,379 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:49:53,379 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:49:53,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:49:53,380 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:49:53,405 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:53,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042888038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:53,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:53,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:49:53,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188900471] [2021-07-13 19:49:53,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:49:53,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:53,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:49:53,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:49:53,406 INFO L87 Difference]: Start difference. First operand 300 states and 807 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:53,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:53,575 INFO L93 Difference]: Finished difference Result 335 states and 875 transitions. [2021-07-13 19:49:53,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:53,575 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:49:53,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:53,576 INFO L225 Difference]: With dead ends: 335 [2021-07-13 19:49:53,576 INFO L226 Difference]: Without dead ends: 335 [2021-07-13 19:49:53,576 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 210.5ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:49:53,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-07-13 19:49:53,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 300. [2021-07-13 19:49:53,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.698996655518395) internal successors, (807), 299 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:53,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 807 transitions. [2021-07-13 19:49:53,580 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 807 transitions. Word has length 19 [2021-07-13 19:49:53,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:53,580 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 807 transitions. [2021-07-13 19:49:53,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:53,581 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 807 transitions. [2021-07-13 19:49:53,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:49:53,581 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:53,581 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:53,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14203,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:53,801 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:53,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:53,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1317532973, now seen corresponding path program 437 times [2021-07-13 19:49:53,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:53,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574944584] [2021-07-13 19:49:53,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:53,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:53,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:53,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:53,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574944584] [2021-07-13 19:49:53,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574944584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:53,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685204666] [2021-07-13 19:49:53,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:53,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:49:53,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:53,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:49:53,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:54,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:54,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:54,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:49:54,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:54,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:54,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:49:54,047 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:54,072 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:49:54,073 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:49:54,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:49:54,073 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:49:54,117 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:54,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685204666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:54,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:54,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:49:54,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450002305] [2021-07-13 19:49:54,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:49:54,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:54,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:49:54,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:49:54,118 INFO L87 Difference]: Start difference. First operand 300 states and 807 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:54,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:54,529 INFO L93 Difference]: Finished difference Result 354 states and 905 transitions. [2021-07-13 19:49:54,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:49:54,529 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:49:54,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:54,530 INFO L225 Difference]: With dead ends: 354 [2021-07-13 19:49:54,530 INFO L226 Difference]: Without dead ends: 354 [2021-07-13 19:49:54,530 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 395.2ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:49:54,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-07-13 19:49:54,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 300. [2021-07-13 19:49:54,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.698996655518395) internal successors, (807), 299 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:54,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 807 transitions. [2021-07-13 19:49:54,533 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 807 transitions. Word has length 19 [2021-07-13 19:49:54,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:54,533 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 807 transitions. [2021-07-13 19:49:54,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:54,533 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 807 transitions. [2021-07-13 19:49:54,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:49:54,534 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:54,534 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:54,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14207 [2021-07-13 19:49:54,734 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:54,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:54,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1764870696, now seen corresponding path program 438 times [2021-07-13 19:49:54,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:54,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189489348] [2021-07-13 19:49:54,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:54,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:54,822 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:54,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:54,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189489348] [2021-07-13 19:49:54,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189489348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:54,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302156030] [2021-07-13 19:49:54,823 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:54,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:49:54,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:54,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:49:54,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:55,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:49:55,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:55,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:55,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:49:55,035 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:55,076 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-07-13 19:49:55,076 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:49:55,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:49:55,079 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:55,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:55,093 INFO L518 ElimStorePlain]: Eliminatee v_prenex_455 vanished before elimination [2021-07-13 19:49:55,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:49:55,095 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:49:55,153 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:55,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302156030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:55,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:55,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:49:55,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259557715] [2021-07-13 19:49:55,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:49:55,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:55,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:49:55,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:49:55,154 INFO L87 Difference]: Start difference. First operand 300 states and 807 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:55,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:55,297 INFO L93 Difference]: Finished difference Result 312 states and 828 transitions. [2021-07-13 19:49:55,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:55,297 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:49:55,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:55,298 INFO L225 Difference]: With dead ends: 312 [2021-07-13 19:49:55,298 INFO L226 Difference]: Without dead ends: 312 [2021-07-13 19:49:55,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 238.8ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:49:55,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-07-13 19:49:55,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 300. [2021-07-13 19:49:55,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.698996655518395) internal successors, (807), 299 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:55,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 807 transitions. [2021-07-13 19:49:55,301 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 807 transitions. Word has length 19 [2021-07-13 19:49:55,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:55,301 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 807 transitions. [2021-07-13 19:49:55,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:55,301 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 807 transitions. [2021-07-13 19:49:55,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:49:55,302 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:55,302 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:55,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14215,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:55,502 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:55,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:55,502 INFO L82 PathProgramCache]: Analyzing trace with hash 547299355, now seen corresponding path program 439 times [2021-07-13 19:49:55,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:55,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35030279] [2021-07-13 19:49:55,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:55,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:55,586 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:55,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:55,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35030279] [2021-07-13 19:49:55,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35030279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:55,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667269897] [2021-07-13 19:49:55,587 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:55,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:49:55,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:55,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:55,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:55,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:49:55,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:55,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:55,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:49:55,753 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:55,778 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:49:55,778 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:49:55,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:49:55,779 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:49:55,844 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:55,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667269897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:55,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:55,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:49:55,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129532156] [2021-07-13 19:49:55,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:49:55,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:55,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:49:55,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:49:55,845 INFO L87 Difference]: Start difference. First operand 300 states and 807 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:56,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:56,277 INFO L93 Difference]: Finished difference Result 335 states and 872 transitions. [2021-07-13 19:49:56,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:49:56,277 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:49:56,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:56,278 INFO L225 Difference]: With dead ends: 335 [2021-07-13 19:49:56,278 INFO L226 Difference]: Without dead ends: 333 [2021-07-13 19:49:56,278 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 438.7ms TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:49:56,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-07-13 19:49:56,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 296. [2021-07-13 19:49:56,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.705084745762712) internal successors, (798), 295 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:56,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 798 transitions. [2021-07-13 19:49:56,281 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 798 transitions. Word has length 19 [2021-07-13 19:49:56,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:56,281 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 798 transitions. [2021-07-13 19:49:56,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:56,281 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 798 transitions. [2021-07-13 19:49:56,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:49:56,282 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:56,282 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:56,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14232,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:56,482 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:56,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:56,482 INFO L82 PathProgramCache]: Analyzing trace with hash 222503102, now seen corresponding path program 440 times [2021-07-13 19:49:56,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:56,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638360014] [2021-07-13 19:49:56,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:56,561 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:56,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:56,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638360014] [2021-07-13 19:49:56,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638360014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:56,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563811029] [2021-07-13 19:49:56,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:56,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:49:56,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:56,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:49:56,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:56,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:56,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:56,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:49:56,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:56,877 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:49:56,877 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:56,913 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:49:56,913 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:49:56,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:49:56,916 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:56,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:56,928 INFO L518 ElimStorePlain]: Eliminatee v_prenex_461 vanished before elimination [2021-07-13 19:49:56,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:49:56,929 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:49:56,957 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:56,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563811029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:56,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:56,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:49:56,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902123659] [2021-07-13 19:49:56,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:49:56,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:56,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:49:56,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:49:56,958 INFO L87 Difference]: Start difference. First operand 296 states and 798 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:57,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:57,510 INFO L93 Difference]: Finished difference Result 361 states and 898 transitions. [2021-07-13 19:49:57,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:49:57,511 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:49:57,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:57,511 INFO L225 Difference]: With dead ends: 361 [2021-07-13 19:49:57,511 INFO L226 Difference]: Without dead ends: 349 [2021-07-13 19:49:57,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 586.0ms TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:49:57,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-07-13 19:49:57,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 302. [2021-07-13 19:49:57,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.6877076411960132) internal successors, (809), 301 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:57,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 809 transitions. [2021-07-13 19:49:57,515 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 809 transitions. Word has length 19 [2021-07-13 19:49:57,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:57,515 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 809 transitions. [2021-07-13 19:49:57,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:57,515 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 809 transitions. [2021-07-13 19:49:57,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:49:57,516 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:57,516 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:57,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14243,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:57,716 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:57,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:57,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1753429309, now seen corresponding path program 441 times [2021-07-13 19:49:57,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:57,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425181640] [2021-07-13 19:49:57,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:57,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:57,797 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:57,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:57,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425181640] [2021-07-13 19:49:57,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425181640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:57,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102519141] [2021-07-13 19:49:57,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:57,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:49:57,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:57,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:49:57,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:57,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:57,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:57,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:49:57,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:57,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:57,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:49:57,963 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:57,984 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:49:57,984 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:49:57,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:49:57,985 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:49:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:58,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102519141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:58,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:58,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:49:58,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889642163] [2021-07-13 19:49:58,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:49:58,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:58,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:49:58,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:49:58,006 INFO L87 Difference]: Start difference. First operand 302 states and 809 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:58,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:58,347 INFO L93 Difference]: Finished difference Result 442 states and 1075 transitions. [2021-07-13 19:49:58,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:49:58,348 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:49:58,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:58,348 INFO L225 Difference]: With dead ends: 442 [2021-07-13 19:49:58,348 INFO L226 Difference]: Without dead ends: 442 [2021-07-13 19:49:58,349 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 290.0ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:49:58,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-07-13 19:49:58,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 317. [2021-07-13 19:49:58,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.6962025316455698) internal successors, (852), 316 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:58,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 852 transitions. [2021-07-13 19:49:58,352 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 852 transitions. Word has length 19 [2021-07-13 19:49:58,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:58,352 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 852 transitions. [2021-07-13 19:49:58,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:58,353 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 852 transitions. [2021-07-13 19:49:58,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:49:58,353 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:58,353 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:58,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14269 [2021-07-13 19:49:58,553 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:58,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:58,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1358607106, now seen corresponding path program 442 times [2021-07-13 19:49:58,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:58,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732549991] [2021-07-13 19:49:58,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:58,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:58,632 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:58,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:58,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732549991] [2021-07-13 19:49:58,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732549991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:58,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128158700] [2021-07-13 19:49:58,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:58,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:49:58,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:58,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:49:58,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:58,904 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:49:58,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:58,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:49:58,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:49:58,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:58,943 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:49:58,943 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:49:58,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:49:58,946 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:58,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:58,959 INFO L518 ElimStorePlain]: Eliminatee v_prenex_465 vanished before elimination [2021-07-13 19:49:58,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:49:58,960 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:49:58,987 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:58,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128158700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:58,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:58,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:49:58,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607253781] [2021-07-13 19:49:58,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:49:58,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:58,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:49:58,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:49:58,988 INFO L87 Difference]: Start difference. First operand 317 states and 852 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:59,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:59,634 INFO L93 Difference]: Finished difference Result 370 states and 926 transitions. [2021-07-13 19:49:59,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:49:59,635 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:49:59,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:59,635 INFO L225 Difference]: With dead ends: 370 [2021-07-13 19:49:59,635 INFO L226 Difference]: Without dead ends: 361 [2021-07-13 19:49:59,635 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 623.1ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:49:59,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-07-13 19:49:59,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 317. [2021-07-13 19:49:59,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.689873417721519) internal successors, (850), 316 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:59,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 850 transitions. [2021-07-13 19:49:59,639 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 850 transitions. Word has length 19 [2021-07-13 19:49:59,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:59,639 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 850 transitions. [2021-07-13 19:49:59,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:59,639 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 850 transitions. [2021-07-13 19:49:59,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:49:59,639 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:59,639 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:59,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14273,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:59,840 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:59,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:59,840 INFO L82 PathProgramCache]: Analyzing trace with hash 2100728483, now seen corresponding path program 443 times [2021-07-13 19:49:59,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:59,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211086443] [2021-07-13 19:49:59,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:59,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:59,926 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:59,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:59,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211086443] [2021-07-13 19:49:59,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211086443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:59,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885943613] [2021-07-13 19:49:59,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:59,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:49:59,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:59,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:49:59,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:00,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:00,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:00,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:00,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:00,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:00,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:50:00,095 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:00,116 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:50:00,116 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:00,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:50:00,117 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:50:00,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:00,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885943613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:00,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:00,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:50:00,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037104584] [2021-07-13 19:50:00,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:00,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:00,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:00,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:00,138 INFO L87 Difference]: Start difference. First operand 317 states and 850 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:01,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:01,256 INFO L93 Difference]: Finished difference Result 437 states and 1062 transitions. [2021-07-13 19:50:01,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:50:01,256 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:01,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:01,256 INFO L225 Difference]: With dead ends: 437 [2021-07-13 19:50:01,256 INFO L226 Difference]: Without dead ends: 419 [2021-07-13 19:50:01,257 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1019.1ms TimeCoverageRelationStatistics Valid=280, Invalid=1526, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:50:01,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-07-13 19:50:01,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 290. [2021-07-13 19:50:01,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.671280276816609) internal successors, (772), 289 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:01,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 772 transitions. [2021-07-13 19:50:01,260 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 772 transitions. Word has length 19 [2021-07-13 19:50:01,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:01,260 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 772 transitions. [2021-07-13 19:50:01,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:01,260 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 772 transitions. [2021-07-13 19:50:01,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:01,260 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:01,261 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:01,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14290 [2021-07-13 19:50:01,461 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:01,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:01,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1118160958, now seen corresponding path program 444 times [2021-07-13 19:50:01,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:01,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312042591] [2021-07-13 19:50:01,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:01,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:01,539 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:01,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:01,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312042591] [2021-07-13 19:50:01,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312042591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:01,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435430540] [2021-07-13 19:50:01,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:01,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:50:01,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:01,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:01,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:01,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:50:01,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:01,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:01,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:01,731 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:01,771 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-07-13 19:50:01,771 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:01,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:50:01,774 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:01,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:01,788 INFO L518 ElimStorePlain]: Eliminatee v_prenex_469 vanished before elimination [2021-07-13 19:50:01,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:50:01,789 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:50:01,850 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:01,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435430540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:01,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:01,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:50:01,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336837690] [2021-07-13 19:50:01,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:01,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:01,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:01,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:01,851 INFO L87 Difference]: Start difference. First operand 290 states and 772 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:02,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:02,649 INFO L93 Difference]: Finished difference Result 356 states and 890 transitions. [2021-07-13 19:50:02,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:50:02,649 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:02,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:02,650 INFO L225 Difference]: With dead ends: 356 [2021-07-13 19:50:02,650 INFO L226 Difference]: Without dead ends: 350 [2021-07-13 19:50:02,650 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 787.0ms TimeCoverageRelationStatistics Valid=185, Invalid=1221, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:50:02,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-07-13 19:50:02,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 293. [2021-07-13 19:50:02,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.6815068493150687) internal successors, (783), 292 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:02,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 783 transitions. [2021-07-13 19:50:02,653 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 783 transitions. Word has length 19 [2021-07-13 19:50:02,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:02,653 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 783 transitions. [2021-07-13 19:50:02,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:02,654 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 783 transitions. [2021-07-13 19:50:02,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:02,654 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:02,654 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:02,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14294 [2021-07-13 19:50:02,855 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:02,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:02,855 INFO L82 PathProgramCache]: Analyzing trace with hash 865005693, now seen corresponding path program 445 times [2021-07-13 19:50:02,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:02,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640495105] [2021-07-13 19:50:02,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:02,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:02,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:02,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640495105] [2021-07-13 19:50:02,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640495105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:02,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991507528] [2021-07-13 19:50:02,937 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:02,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:02,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:02,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:03,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:03,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:03,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:03,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:03,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:03,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:50:03,093 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:03,118 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:50:03,118 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:03,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:50:03,119 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:50:03,162 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:03,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991507528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:03,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:03,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:50:03,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492047214] [2021-07-13 19:50:03,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:03,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:03,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:03,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:03,163 INFO L87 Difference]: Start difference. First operand 293 states and 783 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:04,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:04,716 INFO L93 Difference]: Finished difference Result 496 states and 1175 transitions. [2021-07-13 19:50:04,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 19:50:04,716 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:04,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:04,717 INFO L225 Difference]: With dead ends: 496 [2021-07-13 19:50:04,717 INFO L226 Difference]: Without dead ends: 496 [2021-07-13 19:50:04,717 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1345.1ms TimeCoverageRelationStatistics Valid=354, Invalid=2196, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:50:04,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-07-13 19:50:04,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 293. [2021-07-13 19:50:04,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.6815068493150687) internal successors, (783), 292 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:04,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 783 transitions. [2021-07-13 19:50:04,720 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 783 transitions. Word has length 19 [2021-07-13 19:50:04,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:04,720 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 783 transitions. [2021-07-13 19:50:04,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:04,721 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 783 transitions. [2021-07-13 19:50:04,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:04,721 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:04,721 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:04,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 449 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14313 [2021-07-13 19:50:04,921 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:04,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:04,922 INFO L82 PathProgramCache]: Analyzing trace with hash 417667970, now seen corresponding path program 446 times [2021-07-13 19:50:04,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:04,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343746587] [2021-07-13 19:50:04,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:04,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:04,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:04,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343746587] [2021-07-13 19:50:04,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343746587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:04,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075712930] [2021-07-13 19:50:04,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:05,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:05,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:05,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:05,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:05,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:50:05,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:05,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:05,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:05,188 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:05,229 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-07-13 19:50:05,229 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:05,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:50:05,232 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:05,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:05,246 INFO L518 ElimStorePlain]: Eliminatee v_prenex_472 vanished before elimination [2021-07-13 19:50:05,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:50:05,247 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:50:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:05,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075712930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:05,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:05,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:50:05,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462540052] [2021-07-13 19:50:05,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:05,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:05,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:05,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:05,300 INFO L87 Difference]: Start difference. First operand 293 states and 783 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:05,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:05,786 INFO L93 Difference]: Finished difference Result 326 states and 842 transitions. [2021-07-13 19:50:05,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:50:05,786 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:05,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:05,787 INFO L225 Difference]: With dead ends: 326 [2021-07-13 19:50:05,787 INFO L226 Difference]: Without dead ends: 326 [2021-07-13 19:50:05,787 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 484.5ms TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:50:05,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-07-13 19:50:05,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 291. [2021-07-13 19:50:05,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.6724137931034484) internal successors, (775), 290 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:05,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 775 transitions. [2021-07-13 19:50:05,790 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 775 transitions. Word has length 19 [2021-07-13 19:50:05,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:05,790 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 775 transitions. [2021-07-13 19:50:05,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:05,790 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 775 transitions. [2021-07-13 19:50:05,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:05,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:05,791 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:05,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14321,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:05,991 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:05,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:05,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1565129275, now seen corresponding path program 447 times [2021-07-13 19:50:05,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:05,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234080954] [2021-07-13 19:50:05,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:05,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:06,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:06,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:06,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234080954] [2021-07-13 19:50:06,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234080954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:06,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500950525] [2021-07-13 19:50:06,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:06,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:50:06,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:06,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:06,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:06,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:06,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:06,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:50:06,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:06,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:06,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:06,223 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:06,248 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:50:06,248 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:06,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:50:06,249 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:50:06,314 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:06,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500950525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:06,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:06,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:50:06,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463996636] [2021-07-13 19:50:06,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:06,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:06,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:06,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:06,315 INFO L87 Difference]: Start difference. First operand 291 states and 775 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:08,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:08,094 INFO L93 Difference]: Finished difference Result 433 states and 1057 transitions. [2021-07-13 19:50:08,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 19:50:08,094 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:08,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:08,095 INFO L225 Difference]: With dead ends: 433 [2021-07-13 19:50:08,095 INFO L226 Difference]: Without dead ends: 429 [2021-07-13 19:50:08,095 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 1596.5ms TimeCoverageRelationStatistics Valid=388, Invalid=2918, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 19:50:08,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-07-13 19:50:08,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 287. [2021-07-13 19:50:08,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.6783216783216783) internal successors, (766), 286 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:08,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 766 transitions. [2021-07-13 19:50:08,102 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 766 transitions. Word has length 19 [2021-07-13 19:50:08,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:08,102 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 766 transitions. [2021-07-13 19:50:08,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:08,102 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 766 transitions. [2021-07-13 19:50:08,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:08,103 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:08,103 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:08,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14338 [2021-07-13 19:50:08,303 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:08,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:08,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1896124392, now seen corresponding path program 448 times [2021-07-13 19:50:08,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:08,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5481475] [2021-07-13 19:50:08,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:08,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:08,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:08,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5481475] [2021-07-13 19:50:08,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5481475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:08,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015033170] [2021-07-13 19:50:08,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:08,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:50:08,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:08,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:08,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:08,624 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:50:08,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:08,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:08,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:08,628 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:08,663 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:50:08,663 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:08,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:50:08,666 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:08,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:08,679 INFO L518 ElimStorePlain]: Eliminatee v_prenex_476 vanished before elimination [2021-07-13 19:50:08,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:50:08,680 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:50:08,707 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:08,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015033170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:08,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:08,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:50:08,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089873506] [2021-07-13 19:50:08,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:08,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:08,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:08,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:08,708 INFO L87 Difference]: Start difference. First operand 287 states and 766 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:09,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:09,341 INFO L93 Difference]: Finished difference Result 422 states and 1037 transitions. [2021-07-13 19:50:09,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:50:09,342 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:09,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:09,342 INFO L225 Difference]: With dead ends: 422 [2021-07-13 19:50:09,342 INFO L226 Difference]: Without dead ends: 410 [2021-07-13 19:50:09,343 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 576.4ms TimeCoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:50:09,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-07-13 19:50:09,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 316. [2021-07-13 19:50:09,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.7111111111111112) internal successors, (854), 315 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:09,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 854 transitions. [2021-07-13 19:50:09,346 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 854 transitions. Word has length 19 [2021-07-13 19:50:09,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:09,346 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 854 transitions. [2021-07-13 19:50:09,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:09,346 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 854 transitions. [2021-07-13 19:50:09,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:09,347 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:09,347 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:09,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14349 [2021-07-13 19:50:09,547 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:09,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:09,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1154003015, now seen corresponding path program 449 times [2021-07-13 19:50:09,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:09,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798956471] [2021-07-13 19:50:09,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:09,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:09,629 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:09,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:09,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798956471] [2021-07-13 19:50:09,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798956471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:09,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657526353] [2021-07-13 19:50:09,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:09,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:50:09,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:09,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:09,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:09,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:09,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:09,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:50:09,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:09,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:09,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:09,792 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:09,813 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:50:09,814 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:09,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:50:09,814 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:50:09,836 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:09,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657526353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:09,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:09,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:50:09,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740334312] [2021-07-13 19:50:09,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:09,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:09,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:09,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:09,837 INFO L87 Difference]: Start difference. First operand 316 states and 854 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:10,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:10,419 INFO L93 Difference]: Finished difference Result 579 states and 1352 transitions. [2021-07-13 19:50:10,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:50:10,419 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:10,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:10,420 INFO L225 Difference]: With dead ends: 579 [2021-07-13 19:50:10,420 INFO L226 Difference]: Without dead ends: 579 [2021-07-13 19:50:10,420 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 451.8ms TimeCoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:50:10,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-07-13 19:50:10,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 326. [2021-07-13 19:50:10,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.72) internal successors, (884), 325 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:10,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 884 transitions. [2021-07-13 19:50:10,425 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 884 transitions. Word has length 19 [2021-07-13 19:50:10,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:10,425 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 884 transitions. [2021-07-13 19:50:10,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:10,425 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 884 transitions. [2021-07-13 19:50:10,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:10,425 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:10,425 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:10,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14366,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:10,626 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:10,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:10,626 INFO L82 PathProgramCache]: Analyzing trace with hash -2136570540, now seen corresponding path program 450 times [2021-07-13 19:50:10,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:10,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982982818] [2021-07-13 19:50:10,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:10,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:10,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:10,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982982818] [2021-07-13 19:50:10,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982982818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:10,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445209592] [2021-07-13 19:50:10,702 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:10,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:50:10,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:10,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:10,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:10,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:50:10,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:10,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:10,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:50:10,876 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:10,916 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-07-13 19:50:10,916 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:10,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:50:10,919 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:10,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:10,934 INFO L518 ElimStorePlain]: Eliminatee v_prenex_479 vanished before elimination [2021-07-13 19:50:10,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:50:10,942 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:50:11,002 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:11,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445209592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:11,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:11,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:50:11,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882156196] [2021-07-13 19:50:11,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:11,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:11,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:11,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:11,003 INFO L87 Difference]: Start difference. First operand 326 states and 884 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:12,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:12,093 INFO L93 Difference]: Finished difference Result 585 states and 1337 transitions. [2021-07-13 19:50:12,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 19:50:12,094 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:12,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:12,095 INFO L225 Difference]: With dead ends: 585 [2021-07-13 19:50:12,095 INFO L226 Difference]: Without dead ends: 579 [2021-07-13 19:50:12,095 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 924.7ms TimeCoverageRelationStatistics Valid=285, Invalid=2367, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 19:50:12,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-07-13 19:50:12,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 333. [2021-07-13 19:50:12,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.7349397590361444) internal successors, (908), 332 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:12,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 908 transitions. [2021-07-13 19:50:12,099 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 908 transitions. Word has length 19 [2021-07-13 19:50:12,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:12,099 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 908 transitions. [2021-07-13 19:50:12,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:12,099 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 908 transitions. [2021-07-13 19:50:12,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:12,100 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:12,100 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:12,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14370 [2021-07-13 19:50:12,300 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:12,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:12,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1905241491, now seen corresponding path program 451 times [2021-07-13 19:50:12,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:12,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161408105] [2021-07-13 19:50:12,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:12,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:12,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:12,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161408105] [2021-07-13 19:50:12,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161408105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:12,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003613770] [2021-07-13 19:50:12,376 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:12,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:12,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:12,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:12,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:12,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:12,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:12,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:12,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:12,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:50:12,520 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:12,545 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:50:12,545 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:12,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:50:12,546 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:50:12,589 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:12,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003613770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:12,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:12,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:50:12,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929943447] [2021-07-13 19:50:12,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:12,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:12,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:12,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:12,590 INFO L87 Difference]: Start difference. First operand 333 states and 908 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:14,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:14,006 INFO L93 Difference]: Finished difference Result 724 states and 1605 transitions. [2021-07-13 19:50:14,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 19:50:14,006 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:14,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:14,007 INFO L225 Difference]: With dead ends: 724 [2021-07-13 19:50:14,007 INFO L226 Difference]: Without dead ends: 718 [2021-07-13 19:50:14,008 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1131.3ms TimeCoverageRelationStatistics Valid=383, Invalid=2479, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 19:50:14,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-07-13 19:50:14,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 329. [2021-07-13 19:50:14,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.7195121951219514) internal successors, (892), 328 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:14,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 892 transitions. [2021-07-13 19:50:14,016 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 892 transitions. Word has length 19 [2021-07-13 19:50:14,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:14,016 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 892 transitions. [2021-07-13 19:50:14,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:14,016 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 892 transitions. [2021-07-13 19:50:14,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:14,017 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:14,017 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:14,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14389 [2021-07-13 19:50:14,217 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:14,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:14,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1457903768, now seen corresponding path program 452 times [2021-07-13 19:50:14,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:14,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50002764] [2021-07-13 19:50:14,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:14,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:14,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:14,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:14,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50002764] [2021-07-13 19:50:14,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50002764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:14,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401694643] [2021-07-13 19:50:14,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:14,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:14,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:14,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:14,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:14,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:14,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:14,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:50:14,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:14,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:50:14,449 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:14,489 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-07-13 19:50:14,489 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:14,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:50:14,492 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:14,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:14,506 INFO L518 ElimStorePlain]: Eliminatee v_prenex_482 vanished before elimination [2021-07-13 19:50:14,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:50:14,507 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:50:14,559 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:14,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401694643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:14,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:14,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:50:14,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049659753] [2021-07-13 19:50:14,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:14,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:14,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:14,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:14,560 INFO L87 Difference]: Start difference. First operand 329 states and 892 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:15,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:15,165 INFO L93 Difference]: Finished difference Result 477 states and 1158 transitions. [2021-07-13 19:50:15,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:50:15,165 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:15,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:15,166 INFO L225 Difference]: With dead ends: 477 [2021-07-13 19:50:15,166 INFO L226 Difference]: Without dead ends: 477 [2021-07-13 19:50:15,166 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 491.8ms TimeCoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:50:15,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-07-13 19:50:15,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 324. [2021-07-13 19:50:15,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.6996904024767803) internal successors, (872), 323 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:15,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 872 transitions. [2021-07-13 19:50:15,170 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 872 transitions. Word has length 19 [2021-07-13 19:50:15,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:15,170 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 872 transitions. [2021-07-13 19:50:15,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:15,170 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 872 transitions. [2021-07-13 19:50:15,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:15,170 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:15,170 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:15,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14397,456 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:15,371 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:15,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:15,371 INFO L82 PathProgramCache]: Analyzing trace with hash -524893477, now seen corresponding path program 453 times [2021-07-13 19:50:15,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:15,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999724746] [2021-07-13 19:50:15,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:15,444 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:15,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:15,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999724746] [2021-07-13 19:50:15,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999724746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:15,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297821229] [2021-07-13 19:50:15,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:15,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:50:15,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:15,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:15,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:15,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:15,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:15,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:50:15,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:15,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:15,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:15,584 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:15,609 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:50:15,609 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:15,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:50:15,610 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:50:15,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:15,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297821229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:15,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:15,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:50:15,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590235131] [2021-07-13 19:50:15,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:15,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:15,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:15,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:15,676 INFO L87 Difference]: Start difference. First operand 324 states and 872 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:17,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:17,506 INFO L93 Difference]: Finished difference Result 649 states and 1474 transitions. [2021-07-13 19:50:17,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 19:50:17,506 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:17,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:17,507 INFO L225 Difference]: With dead ends: 649 [2021-07-13 19:50:17,507 INFO L226 Difference]: Without dead ends: 645 [2021-07-13 19:50:17,507 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 1534.4ms TimeCoverageRelationStatistics Valid=496, Invalid=4196, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 19:50:17,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-07-13 19:50:17,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 318. [2021-07-13 19:50:17,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.7003154574132493) internal successors, (856), 317 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:17,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 856 transitions. [2021-07-13 19:50:17,511 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 856 transitions. Word has length 19 [2021-07-13 19:50:17,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:17,512 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 856 transitions. [2021-07-13 19:50:17,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:17,512 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 856 transitions. [2021-07-13 19:50:17,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:17,512 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:17,512 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:17,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14408 [2021-07-13 19:50:17,713 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:17,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:17,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1548825218, now seen corresponding path program 454 times [2021-07-13 19:50:17,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:17,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100349139] [2021-07-13 19:50:17,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:17,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:17,786 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:17,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:17,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100349139] [2021-07-13 19:50:17,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100349139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:17,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151952916] [2021-07-13 19:50:17,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:17,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:50:17,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:17,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:17,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:17,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:17,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:17,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:17,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:17,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:50:17,909 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:17,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:17,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:17,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:50:17,913 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:17,915 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:50:17,915 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:17,947 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-07-13 19:50:17,948 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:17,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:50:17,949 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:50:17,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:17,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151952916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:17,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:17,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:50:17,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493645532] [2021-07-13 19:50:17,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:17,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:17,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:17,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:17,999 INFO L87 Difference]: Start difference. First operand 318 states and 856 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:18,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:18,771 INFO L93 Difference]: Finished difference Result 584 states and 1361 transitions. [2021-07-13 19:50:18,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 19:50:18,771 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:18,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:18,772 INFO L225 Difference]: With dead ends: 584 [2021-07-13 19:50:18,772 INFO L226 Difference]: Without dead ends: 578 [2021-07-13 19:50:18,772 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 574.0ms TimeCoverageRelationStatistics Valid=200, Invalid=1692, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:50:18,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-07-13 19:50:18,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 333. [2021-07-13 19:50:18,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.7349397590361444) internal successors, (908), 332 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:18,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 908 transitions. [2021-07-13 19:50:18,776 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 908 transitions. Word has length 19 [2021-07-13 19:50:18,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:18,777 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 908 transitions. [2021-07-13 19:50:18,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:18,777 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 908 transitions. [2021-07-13 19:50:18,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:18,777 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:18,777 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:18,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14419,458 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:18,978 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:18,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:18,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1801980483, now seen corresponding path program 455 times [2021-07-13 19:50:18,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:18,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016703309] [2021-07-13 19:50:18,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:18,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:19,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:19,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:19,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016703309] [2021-07-13 19:50:19,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016703309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:19,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366474505] [2021-07-13 19:50:19,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:19,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:50:19,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:19,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:19,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:19,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:19,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:19,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:19,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:19,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:19,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:50:19,209 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:19,237 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:50:19,237 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:19,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:50:19,238 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:50:19,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:19,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366474505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:19,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:19,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:50:19,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649423854] [2021-07-13 19:50:19,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:19,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:19,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:19,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:19,282 INFO L87 Difference]: Start difference. First operand 333 states and 908 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:19,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:19,780 INFO L93 Difference]: Finished difference Result 542 states and 1292 transitions. [2021-07-13 19:50:19,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:50:19,780 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:19,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:19,781 INFO L225 Difference]: With dead ends: 542 [2021-07-13 19:50:19,781 INFO L226 Difference]: Without dead ends: 542 [2021-07-13 19:50:19,781 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 443.0ms TimeCoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:50:19,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-07-13 19:50:19,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 333. [2021-07-13 19:50:19,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.7349397590361444) internal successors, (908), 332 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:19,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 908 transitions. [2021-07-13 19:50:19,785 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 908 transitions. Word has length 19 [2021-07-13 19:50:19,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:19,785 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 908 transitions. [2021-07-13 19:50:19,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:19,785 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 908 transitions. [2021-07-13 19:50:19,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:19,786 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:19,786 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:19,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14430,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:19,986 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:19,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:19,987 INFO L82 PathProgramCache]: Analyzing trace with hash 2045649090, now seen corresponding path program 456 times [2021-07-13 19:50:19,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:19,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746059995] [2021-07-13 19:50:19,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:19,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:20,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:20,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:20,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746059995] [2021-07-13 19:50:20,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746059995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:20,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705178493] [2021-07-13 19:50:20,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:20,091 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:50:20,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:20,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:20,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:20,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:50:20,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:20,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:50:20,191 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:20,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:20,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:20,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:50:20,194 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:20,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:20,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:20,197 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:20,232 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-07-13 19:50:20,232 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:20,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:50:20,233 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:50:20,275 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:20,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705178493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:20,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:20,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:50:20,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906277037] [2021-07-13 19:50:20,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:20,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:20,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:20,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:20,276 INFO L87 Difference]: Start difference. First operand 333 states and 908 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:20,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:20,747 INFO L93 Difference]: Finished difference Result 563 states and 1329 transitions. [2021-07-13 19:50:20,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:50:20,747 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:20,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:20,748 INFO L225 Difference]: With dead ends: 563 [2021-07-13 19:50:20,748 INFO L226 Difference]: Without dead ends: 563 [2021-07-13 19:50:20,749 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 329.8ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:50:20,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-07-13 19:50:20,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 330. [2021-07-13 19:50:20,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.723404255319149) internal successors, (896), 329 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:20,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 896 transitions. [2021-07-13 19:50:20,753 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 896 transitions. Word has length 19 [2021-07-13 19:50:20,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:20,753 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 896 transitions. [2021-07-13 19:50:20,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:20,754 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 896 transitions. [2021-07-13 19:50:20,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:20,754 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:20,754 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:20,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14446,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:20,954 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:20,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:20,956 INFO L82 PathProgramCache]: Analyzing trace with hash 62851845, now seen corresponding path program 457 times [2021-07-13 19:50:20,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:20,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054916300] [2021-07-13 19:50:20,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:20,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:21,037 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:21,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:21,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054916300] [2021-07-13 19:50:21,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054916300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:21,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369637491] [2021-07-13 19:50:21,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:21,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:21,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:21,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:21,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:21,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:21,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:50:21,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:21,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:21,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:21,187 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:21,216 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:50:21,216 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:21,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:50:21,217 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:50:21,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:21,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369637491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:21,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:21,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:50:21,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142725201] [2021-07-13 19:50:21,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:21,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:21,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:21,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:21,282 INFO L87 Difference]: Start difference. First operand 330 states and 896 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:21,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:21,867 INFO L93 Difference]: Finished difference Result 529 states and 1260 transitions. [2021-07-13 19:50:21,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:50:21,868 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:21,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:21,868 INFO L225 Difference]: With dead ends: 529 [2021-07-13 19:50:21,868 INFO L226 Difference]: Without dead ends: 525 [2021-07-13 19:50:21,869 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 539.9ms TimeCoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:50:21,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-07-13 19:50:21,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 327. [2021-07-13 19:50:21,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.7208588957055215) internal successors, (887), 326 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:21,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 887 transitions. [2021-07-13 19:50:21,873 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 887 transitions. Word has length 19 [2021-07-13 19:50:21,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:21,873 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 887 transitions. [2021-07-13 19:50:21,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:21,873 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 887 transitions. [2021-07-13 19:50:21,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:21,873 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:21,873 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:22,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14455 [2021-07-13 19:50:22,074 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:22,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:22,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1510419288, now seen corresponding path program 458 times [2021-07-13 19:50:22,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:22,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102947996] [2021-07-13 19:50:22,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:22,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:22,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:22,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:22,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102947996] [2021-07-13 19:50:22,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102947996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:22,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871953561] [2021-07-13 19:50:22,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:22,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:22,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:22,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:22,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:22,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:22,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:22,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:22,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:22,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:22,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:50:22,280 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:22,300 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-07-13 19:50:22,300 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:22,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:50:22,301 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-07-13 19:50:22,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:22,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871953561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:22,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:22,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:50:22,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814577746] [2021-07-13 19:50:22,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:22,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:22,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:22,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:22,324 INFO L87 Difference]: Start difference. First operand 327 states and 887 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:22,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:22,772 INFO L93 Difference]: Finished difference Result 519 states and 1238 transitions. [2021-07-13 19:50:22,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:50:22,773 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:22,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:22,773 INFO L225 Difference]: With dead ends: 519 [2021-07-13 19:50:22,773 INFO L226 Difference]: Without dead ends: 519 [2021-07-13 19:50:22,774 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 316.2ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:50:22,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-07-13 19:50:22,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 323. [2021-07-13 19:50:22,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.7111801242236027) internal successors, (873), 322 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:22,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 873 transitions. [2021-07-13 19:50:22,778 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 873 transitions. Word has length 19 [2021-07-13 19:50:22,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:22,778 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 873 transitions. [2021-07-13 19:50:22,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:22,778 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 873 transitions. [2021-07-13 19:50:22,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:22,778 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:22,778 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:22,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14474,462 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:22,979 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:22,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:22,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1138563001, now seen corresponding path program 459 times [2021-07-13 19:50:22,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:22,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666062733] [2021-07-13 19:50:22,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:22,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:23,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:23,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:23,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666062733] [2021-07-13 19:50:23,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666062733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:23,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803086927] [2021-07-13 19:50:23,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:23,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:50:23,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:23,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:23,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:23,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:50:23,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:23,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:23,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:23,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:50:23,217 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:23,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:50:23,219 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:23,253 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-07-13 19:50:23,253 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:23,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:50:23,254 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-07-13 19:50:23,282 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:23,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803086927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:23,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:23,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:50:23,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277861609] [2021-07-13 19:50:23,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:23,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:23,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:23,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:23,283 INFO L87 Difference]: Start difference. First operand 323 states and 873 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:23,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:23,713 INFO L93 Difference]: Finished difference Result 460 states and 1121 transitions. [2021-07-13 19:50:23,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:50:23,714 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:23,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:23,714 INFO L225 Difference]: With dead ends: 460 [2021-07-13 19:50:23,714 INFO L226 Difference]: Without dead ends: 452 [2021-07-13 19:50:23,715 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 358.3ms TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:50:23,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-07-13 19:50:23,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 321. [2021-07-13 19:50:23,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.703125) internal successors, (865), 320 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:23,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 865 transitions. [2021-07-13 19:50:23,718 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 865 transitions. Word has length 19 [2021-07-13 19:50:23,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:23,719 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 865 transitions. [2021-07-13 19:50:23,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:23,719 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 865 transitions. [2021-07-13 19:50:23,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:23,719 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:23,719 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:23,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 463 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14478 [2021-07-13 19:50:23,920 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:23,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:23,920 INFO L82 PathProgramCache]: Analyzing trace with hash 218819306, now seen corresponding path program 460 times [2021-07-13 19:50:23,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:23,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224759503] [2021-07-13 19:50:23,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:23,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:24,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:24,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224759503] [2021-07-13 19:50:24,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224759503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:24,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763503507] [2021-07-13 19:50:24,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:24,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:50:24,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:24,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:24,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:24,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:24,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:24,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:24,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:24,332 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:50:24,332 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:24,367 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:50:24,367 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:24,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:50:24,370 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:24,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:24,383 INFO L518 ElimStorePlain]: Eliminatee v_prenex_488 vanished before elimination [2021-07-13 19:50:24,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:50:24,384 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:50:24,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:24,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763503507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:24,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:24,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:50:24,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117305418] [2021-07-13 19:50:24,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:50:24,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:24,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:50:24,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:50:24,413 INFO L87 Difference]: Start difference. First operand 321 states and 865 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:24,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:24,694 INFO L93 Difference]: Finished difference Result 360 states and 930 transitions. [2021-07-13 19:50:24,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:50:24,695 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:24,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:24,695 INFO L225 Difference]: With dead ends: 360 [2021-07-13 19:50:24,695 INFO L226 Difference]: Without dead ends: 336 [2021-07-13 19:50:24,695 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 372.3ms TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:50:24,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-07-13 19:50:24,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 322. [2021-07-13 19:50:24,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.7009345794392523) internal successors, (867), 321 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:24,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 867 transitions. [2021-07-13 19:50:24,699 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 867 transitions. Word has length 19 [2021-07-13 19:50:24,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:24,699 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 867 transitions. [2021-07-13 19:50:24,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:24,699 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 867 transitions. [2021-07-13 19:50:24,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:24,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:24,699 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:24,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14491 [2021-07-13 19:50:24,900 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:24,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:24,900 INFO L82 PathProgramCache]: Analyzing trace with hash 432891467, now seen corresponding path program 461 times [2021-07-13 19:50:24,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:24,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145013622] [2021-07-13 19:50:24,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:24,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:24,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:24,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:24,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145013622] [2021-07-13 19:50:24,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145013622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:24,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409863880] [2021-07-13 19:50:24,984 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:25,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:50:25,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:25,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:25,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:25,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:25,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:25,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:50:25,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:25,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:25,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:25,171 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:25,192 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:50:25,192 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:25,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:50:25,193 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:50:25,220 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:25,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409863880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:25,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:25,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:50:25,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731229952] [2021-07-13 19:50:25,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:50:25,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:25,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:50:25,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:50:25,220 INFO L87 Difference]: Start difference. First operand 322 states and 867 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:25,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:25,487 INFO L93 Difference]: Finished difference Result 368 states and 958 transitions. [2021-07-13 19:50:25,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:50:25,487 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:25,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:25,488 INFO L225 Difference]: With dead ends: 368 [2021-07-13 19:50:25,488 INFO L226 Difference]: Without dead ends: 368 [2021-07-13 19:50:25,488 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 238.7ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:50:25,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-07-13 19:50:25,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 322. [2021-07-13 19:50:25,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.7009345794392523) internal successors, (867), 321 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:25,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 867 transitions. [2021-07-13 19:50:25,492 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 867 transitions. Word has length 19 [2021-07-13 19:50:25,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:25,492 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 867 transitions. [2021-07-13 19:50:25,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:25,492 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 867 transitions. [2021-07-13 19:50:25,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:25,492 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:25,492 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:25,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14508,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:25,693 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:25,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:25,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1078305062, now seen corresponding path program 462 times [2021-07-13 19:50:25,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:25,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048693745] [2021-07-13 19:50:25,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:25,777 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:25,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:25,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048693745] [2021-07-13 19:50:25,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048693745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:25,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652010650] [2021-07-13 19:50:25,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:25,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:50:25,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:25,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:25,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:26,110 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:50:26,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:26,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:26,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:26,114 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:26,149 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:50:26,149 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:26,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:50:26,152 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:26,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:26,165 INFO L518 ElimStorePlain]: Eliminatee v_prenex_493 vanished before elimination [2021-07-13 19:50:26,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:50:26,165 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:50:26,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:26,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652010650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:26,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:26,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:50:26,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264921267] [2021-07-13 19:50:26,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:50:26,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:26,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:50:26,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:50:26,195 INFO L87 Difference]: Start difference. First operand 322 states and 867 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:26,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:26,506 INFO L93 Difference]: Finished difference Result 356 states and 924 transitions. [2021-07-13 19:50:26,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:50:26,507 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:26,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:26,507 INFO L225 Difference]: With dead ends: 356 [2021-07-13 19:50:26,507 INFO L226 Difference]: Without dead ends: 338 [2021-07-13 19:50:26,507 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 408.5ms TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:50:26,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-07-13 19:50:26,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 323. [2021-07-13 19:50:26,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.698757763975155) internal successors, (869), 322 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:26,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 869 transitions. [2021-07-13 19:50:26,511 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 869 transitions. Word has length 19 [2021-07-13 19:50:26,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:26,511 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 869 transitions. [2021-07-13 19:50:26,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:26,511 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 869 transitions. [2021-07-13 19:50:26,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:26,511 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:26,512 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:26,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14512 [2021-07-13 19:50:26,712 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:26,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:26,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1685736027, now seen corresponding path program 463 times [2021-07-13 19:50:26,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:26,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455533190] [2021-07-13 19:50:26,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:26,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:26,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:26,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:26,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455533190] [2021-07-13 19:50:26,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455533190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:26,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551865571] [2021-07-13 19:50:26,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:26,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:26,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:26,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:26,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:26,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:26,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:50:26,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:26,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:26,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:26,992 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:27,013 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:50:27,013 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:27,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:50:27,014 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:50:27,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:27,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551865571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:27,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:27,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:50:27,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306493279] [2021-07-13 19:50:27,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:50:27,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:27,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:50:27,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:50:27,037 INFO L87 Difference]: Start difference. First operand 323 states and 869 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:27,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:27,487 INFO L93 Difference]: Finished difference Result 407 states and 1037 transitions. [2021-07-13 19:50:27,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:50:27,488 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:27,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:27,488 INFO L225 Difference]: With dead ends: 407 [2021-07-13 19:50:27,488 INFO L226 Difference]: Without dead ends: 407 [2021-07-13 19:50:27,488 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 464.5ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:50:27,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-07-13 19:50:27,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 323. [2021-07-13 19:50:27,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.698757763975155) internal successors, (869), 322 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:27,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 869 transitions. [2021-07-13 19:50:27,492 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 869 transitions. Word has length 19 [2021-07-13 19:50:27,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:27,492 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 869 transitions. [2021-07-13 19:50:27,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:27,492 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 869 transitions. [2021-07-13 19:50:27,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:27,493 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:27,493 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:27,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14539,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:27,693 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:27,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:27,693 INFO L82 PathProgramCache]: Analyzing trace with hash -2080558230, now seen corresponding path program 464 times [2021-07-13 19:50:27,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:27,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903059040] [2021-07-13 19:50:27,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:27,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:27,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:27,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:27,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903059040] [2021-07-13 19:50:27,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903059040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:27,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916155009] [2021-07-13 19:50:27,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:27,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:27,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:27,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:27,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:28,116 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:50:28,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:28,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:28,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:28,120 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:28,155 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:50:28,156 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:28,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:50:28,158 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:28,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:28,172 INFO L518 ElimStorePlain]: Eliminatee v_prenex_499 vanished before elimination [2021-07-13 19:50:28,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:50:28,173 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:50:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:28,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916155009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:28,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:28,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:50:28,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634391585] [2021-07-13 19:50:28,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:50:28,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:28,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:50:28,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:50:28,202 INFO L87 Difference]: Start difference. First operand 323 states and 869 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:28,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:28,538 INFO L93 Difference]: Finished difference Result 352 states and 918 transitions. [2021-07-13 19:50:28,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:50:28,539 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:28,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:28,539 INFO L225 Difference]: With dead ends: 352 [2021-07-13 19:50:28,539 INFO L226 Difference]: Without dead ends: 340 [2021-07-13 19:50:28,539 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 427.5ms TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:50:28,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-07-13 19:50:28,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 323. [2021-07-13 19:50:28,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.698757763975155) internal successors, (869), 322 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:28,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 869 transitions. [2021-07-13 19:50:28,543 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 869 transitions. Word has length 19 [2021-07-13 19:50:28,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:28,543 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 869 transitions. [2021-07-13 19:50:28,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:28,543 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 869 transitions. [2021-07-13 19:50:28,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:28,543 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:28,543 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:28,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14543 [2021-07-13 19:50:28,744 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:28,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:28,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1338436853, now seen corresponding path program 465 times [2021-07-13 19:50:28,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:28,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999898232] [2021-07-13 19:50:28,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:28,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:28,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:28,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:28,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999898232] [2021-07-13 19:50:28,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999898232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:28,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281949890] [2021-07-13 19:50:28,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:28,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:50:28,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:28,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:28,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:29,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:29,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:29,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:50:29,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:29,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:29,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:29,029 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:29,050 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:50:29,050 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:29,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:50:29,051 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:50:29,073 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:29,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281949890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:29,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:29,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:50:29,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170511051] [2021-07-13 19:50:29,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:50:29,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:29,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:50:29,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:50:29,074 INFO L87 Difference]: Start difference. First operand 323 states and 869 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:30,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:30,032 INFO L93 Difference]: Finished difference Result 427 states and 1076 transitions. [2021-07-13 19:50:30,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:50:30,032 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:30,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:30,033 INFO L225 Difference]: With dead ends: 427 [2021-07-13 19:50:30,033 INFO L226 Difference]: Without dead ends: 427 [2021-07-13 19:50:30,033 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 802.8ms TimeCoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:50:30,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-07-13 19:50:30,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 324. [2021-07-13 19:50:30,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.696594427244582) internal successors, (871), 323 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:30,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 871 transitions. [2021-07-13 19:50:30,037 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 871 transitions. Word has length 19 [2021-07-13 19:50:30,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:30,037 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 871 transitions. [2021-07-13 19:50:30,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:30,037 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 871 transitions. [2021-07-13 19:50:30,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:30,038 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:30,038 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:30,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14569,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:30,238 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:30,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:30,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1973962918, now seen corresponding path program 466 times [2021-07-13 19:50:30,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:30,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85126862] [2021-07-13 19:50:30,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:30,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:30,321 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:30,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:30,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85126862] [2021-07-13 19:50:30,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85126862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:30,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193791044] [2021-07-13 19:50:30,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:30,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:50:30,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:30,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:30,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:30,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:30,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:30,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:50:30,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:30,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:50:30,539 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:30,580 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-07-13 19:50:30,580 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:30,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:50:30,583 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:30,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:30,597 INFO L518 ElimStorePlain]: Eliminatee v_prenex_502 vanished before elimination [2021-07-13 19:50:30,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:50:30,598 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:50:30,660 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:30,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193791044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:30,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:30,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:50:30,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817672056] [2021-07-13 19:50:30,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:50:30,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:30,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:50:30,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:50:30,661 INFO L87 Difference]: Start difference. First operand 324 states and 871 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:31,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:31,353 INFO L93 Difference]: Finished difference Result 387 states and 978 transitions. [2021-07-13 19:50:31,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:50:31,353 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:31,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:31,354 INFO L225 Difference]: With dead ends: 387 [2021-07-13 19:50:31,354 INFO L226 Difference]: Without dead ends: 381 [2021-07-13 19:50:31,354 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 641.8ms TimeCoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:50:31,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-07-13 19:50:31,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 326. [2021-07-13 19:50:31,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.7015384615384614) internal successors, (878), 325 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:31,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 878 transitions. [2021-07-13 19:50:31,357 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 878 transitions. Word has length 19 [2021-07-13 19:50:31,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:31,358 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 878 transitions. [2021-07-13 19:50:31,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:31,358 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 878 transitions. [2021-07-13 19:50:31,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:31,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:31,358 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:31,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14573,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:31,559 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:31,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:31,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1720807653, now seen corresponding path program 467 times [2021-07-13 19:50:31,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:31,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155937097] [2021-07-13 19:50:31,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:31,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:31,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:31,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:31,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155937097] [2021-07-13 19:50:31,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155937097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:31,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768492728] [2021-07-13 19:50:31,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:31,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:50:31,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:31,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:31,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:31,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:31,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:31,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:31,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:31,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:31,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:50:31,826 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:31,851 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:50:31,852 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:31,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:50:31,852 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:50:31,898 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:31,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768492728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:31,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:31,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:50:31,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088719285] [2021-07-13 19:50:31,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:50:31,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:31,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:50:31,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:50:31,899 INFO L87 Difference]: Start difference. First operand 326 states and 878 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:32,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:32,959 INFO L93 Difference]: Finished difference Result 451 states and 1113 transitions. [2021-07-13 19:50:32,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:50:32,960 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:32,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:32,960 INFO L225 Difference]: With dead ends: 451 [2021-07-13 19:50:32,960 INFO L226 Difference]: Without dead ends: 451 [2021-07-13 19:50:32,961 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 929.8ms TimeCoverageRelationStatistics Valid=196, Invalid=1286, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:50:32,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-07-13 19:50:32,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 326. [2021-07-13 19:50:32,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.7015384615384614) internal successors, (878), 325 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:32,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 878 transitions. [2021-07-13 19:50:32,964 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 878 transitions. Word has length 19 [2021-07-13 19:50:32,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:32,964 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 878 transitions. [2021-07-13 19:50:32,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:32,964 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 878 transitions. [2021-07-13 19:50:32,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:32,965 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:32,965 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:33,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14586,471 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:33,165 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:33,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:33,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1273469930, now seen corresponding path program 468 times [2021-07-13 19:50:33,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:33,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792792480] [2021-07-13 19:50:33,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:33,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:33,247 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:33,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:33,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792792480] [2021-07-13 19:50:33,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792792480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:33,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228072135] [2021-07-13 19:50:33,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:33,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:50:33,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:33,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:33,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:33,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:33,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:33,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:33,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:33,488 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:50:33,489 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:33,525 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-07-13 19:50:33,526 INFO L518 ElimStorePlain]: Eliminatee v_prenex_505 vanished before elimination [2021-07-13 19:50:33,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:50:33,528 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:33,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:33,543 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:33,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:50:33,543 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:50:33,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:33,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228072135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:33,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:33,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:50:33,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551876627] [2021-07-13 19:50:33,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:50:33,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:33,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:50:33,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:50:33,599 INFO L87 Difference]: Start difference. First operand 326 states and 878 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:33,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:33,909 INFO L93 Difference]: Finished difference Result 357 states and 936 transitions. [2021-07-13 19:50:33,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:50:33,909 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:33,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:33,909 INFO L225 Difference]: With dead ends: 357 [2021-07-13 19:50:33,909 INFO L226 Difference]: Without dead ends: 357 [2021-07-13 19:50:33,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 390.5ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:50:33,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-07-13 19:50:33,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 325. [2021-07-13 19:50:33,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.697530864197531) internal successors, (874), 324 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:33,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 874 transitions. [2021-07-13 19:50:33,913 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 874 transitions. Word has length 19 [2021-07-13 19:50:33,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:33,913 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 874 transitions. [2021-07-13 19:50:33,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:33,913 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 874 transitions. [2021-07-13 19:50:33,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:33,914 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:33,914 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:34,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14594,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:34,114 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:34,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:34,115 INFO L82 PathProgramCache]: Analyzing trace with hash -709327315, now seen corresponding path program 469 times [2021-07-13 19:50:34,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:34,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688404053] [2021-07-13 19:50:34,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:34,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:34,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:34,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:34,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688404053] [2021-07-13 19:50:34,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688404053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:34,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528022003] [2021-07-13 19:50:34,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:34,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:34,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:34,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:34,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:34,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:34,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:34,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:34,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:34,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:50:34,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:34,400 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:50:34,401 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:34,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:50:34,401 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:50:34,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:34,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528022003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:34,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:34,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:50:34,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117616759] [2021-07-13 19:50:34,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:50:34,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:34,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:50:34,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:50:34,469 INFO L87 Difference]: Start difference. First operand 325 states and 874 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:35,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:35,683 INFO L93 Difference]: Finished difference Result 400 states and 1019 transitions. [2021-07-13 19:50:35,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:50:35,684 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:35,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:35,684 INFO L225 Difference]: With dead ends: 400 [2021-07-13 19:50:35,684 INFO L226 Difference]: Without dead ends: 396 [2021-07-13 19:50:35,684 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1126.0ms TimeCoverageRelationStatistics Valid=217, Invalid=1589, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:50:35,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-07-13 19:50:35,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 321. [2021-07-13 19:50:35,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.703125) internal successors, (865), 320 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:35,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 865 transitions. [2021-07-13 19:50:35,688 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 865 transitions. Word has length 19 [2021-07-13 19:50:35,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:35,688 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 865 transitions. [2021-07-13 19:50:35,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:35,688 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 865 transitions. [2021-07-13 19:50:35,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:35,689 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:35,689 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:35,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14605,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:35,889 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:35,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:35,889 INFO L82 PathProgramCache]: Analyzing trace with hash -2094901658, now seen corresponding path program 470 times [2021-07-13 19:50:35,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:35,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615419341] [2021-07-13 19:50:35,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:35,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:35,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:35,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:35,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615419341] [2021-07-13 19:50:35,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615419341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:35,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410254455] [2021-07-13 19:50:35,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:35,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:35,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:35,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:35,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:36,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:36,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:36,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:36,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:36,259 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:50:36,260 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:36,294 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:50:36,294 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:36,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:50:36,297 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:36,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:36,310 INFO L518 ElimStorePlain]: Eliminatee v_prenex_510 vanished before elimination [2021-07-13 19:50:36,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:50:36,311 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:50:36,344 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:36,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410254455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:36,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:36,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:50:36,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984727150] [2021-07-13 19:50:36,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:36,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:36,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:36,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:36,345 INFO L87 Difference]: Start difference. First operand 321 states and 865 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:36,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:36,644 INFO L93 Difference]: Finished difference Result 356 states and 924 transitions. [2021-07-13 19:50:36,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:50:36,644 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:36,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:36,645 INFO L225 Difference]: With dead ends: 356 [2021-07-13 19:50:36,645 INFO L226 Difference]: Without dead ends: 338 [2021-07-13 19:50:36,645 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 339.8ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:50:36,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-07-13 19:50:36,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 321. [2021-07-13 19:50:36,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.696875) internal successors, (863), 320 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:36,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 863 transitions. [2021-07-13 19:50:36,648 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 863 transitions. Word has length 19 [2021-07-13 19:50:36,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:36,649 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 863 transitions. [2021-07-13 19:50:36,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:36,649 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 863 transitions. [2021-07-13 19:50:36,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:36,649 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:36,649 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:36,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14616 [2021-07-13 19:50:36,850 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:36,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:36,850 INFO L82 PathProgramCache]: Analyzing trace with hash -563975451, now seen corresponding path program 471 times [2021-07-13 19:50:36,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:36,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424051562] [2021-07-13 19:50:36,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:36,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:36,921 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:36,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:36,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424051562] [2021-07-13 19:50:36,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424051562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:36,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601378451] [2021-07-13 19:50:36,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:36,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:50:36,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:36,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:36,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:37,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:37,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:37,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:37,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:37,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:37,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:50:37,091 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:37,112 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:50:37,113 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:37,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:50:37,114 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:50:37,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:37,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601378451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:37,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:37,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:50:37,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766097476] [2021-07-13 19:50:37,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:37,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:37,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:37,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:37,135 INFO L87 Difference]: Start difference. First operand 321 states and 863 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:37,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:37,362 INFO L93 Difference]: Finished difference Result 416 states and 1055 transitions. [2021-07-13 19:50:37,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:50:37,362 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:37,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:37,363 INFO L225 Difference]: With dead ends: 416 [2021-07-13 19:50:37,363 INFO L226 Difference]: Without dead ends: 416 [2021-07-13 19:50:37,363 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 213.6ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:50:37,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-07-13 19:50:37,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 324. [2021-07-13 19:50:37,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.6996904024767803) internal successors, (872), 323 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:37,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 872 transitions. [2021-07-13 19:50:37,366 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 872 transitions. Word has length 19 [2021-07-13 19:50:37,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:37,367 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 872 transitions. [2021-07-13 19:50:37,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:37,367 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 872 transitions. [2021-07-13 19:50:37,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:37,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:37,367 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:37,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14643,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:37,568 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:37,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:37,568 INFO L82 PathProgramCache]: Analyzing trace with hash -958797654, now seen corresponding path program 472 times [2021-07-13 19:50:37,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:37,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091094437] [2021-07-13 19:50:37,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:37,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:37,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:37,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:37,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091094437] [2021-07-13 19:50:37,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091094437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:37,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060945853] [2021-07-13 19:50:37,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:37,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:50:37,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:37,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:37,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:37,953 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:50:37,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:37,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:37,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:37,957 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:37,992 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:50:37,992 INFO L518 ElimStorePlain]: Eliminatee v_prenex_516 vanished before elimination [2021-07-13 19:50:37,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:50:37,995 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:38,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:38,008 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:38,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:50:38,009 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:50:38,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:38,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060945853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:38,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:38,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:50:38,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376490037] [2021-07-13 19:50:38,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:38,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:38,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:38,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:38,042 INFO L87 Difference]: Start difference. First operand 324 states and 872 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:38,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:38,385 INFO L93 Difference]: Finished difference Result 356 states and 927 transitions. [2021-07-13 19:50:38,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:50:38,385 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:38,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:38,386 INFO L225 Difference]: With dead ends: 356 [2021-07-13 19:50:38,386 INFO L226 Difference]: Without dead ends: 344 [2021-07-13 19:50:38,386 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 387.2ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:50:38,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-07-13 19:50:38,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 324. [2021-07-13 19:50:38,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.693498452012384) internal successors, (870), 323 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:38,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 870 transitions. [2021-07-13 19:50:38,390 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 870 transitions. Word has length 19 [2021-07-13 19:50:38,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:38,390 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 870 transitions. [2021-07-13 19:50:38,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:38,390 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 870 transitions. [2021-07-13 19:50:38,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:38,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:38,390 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:38,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14647 [2021-07-13 19:50:38,591 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:38,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:38,591 INFO L82 PathProgramCache]: Analyzing trace with hash -216676277, now seen corresponding path program 473 times [2021-07-13 19:50:38,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:38,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672662672] [2021-07-13 19:50:38,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:38,661 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:38,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:38,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672662672] [2021-07-13 19:50:38,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672662672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:38,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521208718] [2021-07-13 19:50:38,661 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:38,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:50:38,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:38,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:38,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:38,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:38,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:38,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:38,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:38,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:38,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:50:38,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:38,860 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:50:38,860 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:38,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:50:38,861 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:50:38,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:38,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521208718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:38,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:38,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:50:38,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262337989] [2021-07-13 19:50:38,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:38,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:38,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:38,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:38,883 INFO L87 Difference]: Start difference. First operand 324 states and 870 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:39,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:39,376 INFO L93 Difference]: Finished difference Result 507 states and 1242 transitions. [2021-07-13 19:50:39,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:50:39,376 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:39,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:39,377 INFO L225 Difference]: With dead ends: 507 [2021-07-13 19:50:39,377 INFO L226 Difference]: Without dead ends: 507 [2021-07-13 19:50:39,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 428.5ms TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:50:39,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-07-13 19:50:39,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 324. [2021-07-13 19:50:39,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.693498452012384) internal successors, (870), 323 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:39,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 870 transitions. [2021-07-13 19:50:39,381 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 870 transitions. Word has length 19 [2021-07-13 19:50:39,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:39,381 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 870 transitions. [2021-07-13 19:50:39,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:39,381 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 870 transitions. [2021-07-13 19:50:39,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:39,382 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:39,382 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:39,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14673,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:39,582 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:39,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:39,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1199243802, now seen corresponding path program 474 times [2021-07-13 19:50:39,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:39,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695102622] [2021-07-13 19:50:39,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:39,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:39,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:39,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:39,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695102622] [2021-07-13 19:50:39,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695102622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:39,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847471394] [2021-07-13 19:50:39,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:39,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:50:39,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:39,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:39,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:39,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:50:39,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:39,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:39,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:39,843 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:39,888 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-07-13 19:50:39,888 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:39,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:50:39,891 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:39,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:39,905 INFO L518 ElimStorePlain]: Eliminatee v_prenex_519 vanished before elimination [2021-07-13 19:50:39,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:50:39,906 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:50:39,965 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:39,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847471394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:39,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:39,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:50:39,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121183993] [2021-07-13 19:50:39,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:39,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:39,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:39,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:39,966 INFO L87 Difference]: Start difference. First operand 324 states and 870 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:40,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:40,638 INFO L93 Difference]: Finished difference Result 406 states and 1019 transitions. [2021-07-13 19:50:40,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:50:40,642 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:40,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:40,642 INFO L225 Difference]: With dead ends: 406 [2021-07-13 19:50:40,642 INFO L226 Difference]: Without dead ends: 400 [2021-07-13 19:50:40,642 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 643.6ms TimeCoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:50:40,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-07-13 19:50:40,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 327. [2021-07-13 19:50:40,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.6993865030674846) internal successors, (880), 326 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:40,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 880 transitions. [2021-07-13 19:50:40,646 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 880 transitions. Word has length 19 [2021-07-13 19:50:40,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:40,646 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 880 transitions. [2021-07-13 19:50:40,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:40,646 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 880 transitions. [2021-07-13 19:50:40,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:40,647 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:40,647 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:40,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14677 [2021-07-13 19:50:40,847 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:40,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:40,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1452399067, now seen corresponding path program 475 times [2021-07-13 19:50:40,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:40,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12731848] [2021-07-13 19:50:40,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:40,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:40,914 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:40,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:40,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12731848] [2021-07-13 19:50:40,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12731848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:40,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797683191] [2021-07-13 19:50:40,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:40,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:40,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:40,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:41,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:41,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:41,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:50:41,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:41,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:41,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:41,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:41,100 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:50:41,100 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:41,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:50:41,101 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:50:41,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:41,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797683191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:41,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:41,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:50:41,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885511440] [2021-07-13 19:50:41,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:41,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:41,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:41,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:41,145 INFO L87 Difference]: Start difference. First operand 327 states and 880 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:41,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:41,974 INFO L93 Difference]: Finished difference Result 578 states and 1379 transitions. [2021-07-13 19:50:41,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:50:41,974 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:41,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:41,975 INFO L225 Difference]: With dead ends: 578 [2021-07-13 19:50:41,975 INFO L226 Difference]: Without dead ends: 572 [2021-07-13 19:50:41,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 742.0ms TimeCoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:50:41,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-07-13 19:50:41,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 327. [2021-07-13 19:50:41,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.6993865030674846) internal successors, (880), 326 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:41,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 880 transitions. [2021-07-13 19:50:41,979 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 880 transitions. Word has length 19 [2021-07-13 19:50:41,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:41,980 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 880 transitions. [2021-07-13 19:50:41,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:41,980 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 880 transitions. [2021-07-13 19:50:41,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:41,980 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:41,980 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:42,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14690,479 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:42,181 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:42,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:42,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1899736790, now seen corresponding path program 476 times [2021-07-13 19:50:42,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:42,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899994861] [2021-07-13 19:50:42,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:42,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:42,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:42,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899994861] [2021-07-13 19:50:42,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899994861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:42,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644516175] [2021-07-13 19:50:42,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:42,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:42,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:42,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:42,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:42,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:42,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:42,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:50:42,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:42,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:50:42,471 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:42,512 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-07-13 19:50:42,512 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:42,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:50:42,515 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:42,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:42,529 INFO L518 ElimStorePlain]: Eliminatee v_prenex_522 vanished before elimination [2021-07-13 19:50:42,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:50:42,530 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:50:42,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:42,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644516175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:42,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:42,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:50:42,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120575378] [2021-07-13 19:50:42,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:42,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:42,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:42,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:42,582 INFO L87 Difference]: Start difference. First operand 327 states and 880 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:42,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:42,984 INFO L93 Difference]: Finished difference Result 376 states and 969 transitions. [2021-07-13 19:50:42,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:50:42,984 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:42,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:42,985 INFO L225 Difference]: With dead ends: 376 [2021-07-13 19:50:42,985 INFO L226 Difference]: Without dead ends: 372 [2021-07-13 19:50:42,985 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 400.2ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:50:42,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-07-13 19:50:42,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 325. [2021-07-13 19:50:42,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.691358024691358) internal successors, (872), 324 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:42,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 872 transitions. [2021-07-13 19:50:42,989 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 872 transitions. Word has length 19 [2021-07-13 19:50:42,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:42,989 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 872 transitions. [2021-07-13 19:50:42,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:42,989 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 872 transitions. [2021-07-13 19:50:42,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:42,989 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:42,989 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:43,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14698 [2021-07-13 19:50:43,190 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:43,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:43,190 INFO L82 PathProgramCache]: Analyzing trace with hash 412433261, now seen corresponding path program 477 times [2021-07-13 19:50:43,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:43,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089355025] [2021-07-13 19:50:43,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:43,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:43,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:43,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:43,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089355025] [2021-07-13 19:50:43,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089355025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:43,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105510567] [2021-07-13 19:50:43,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:43,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:50:43,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:43,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:43,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:43,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:43,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:43,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:43,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:43,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:43,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:50:43,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:43,452 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:50:43,452 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:43,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:50:43,453 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:50:43,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:43,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105510567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:43,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:43,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:50:43,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629756041] [2021-07-13 19:50:43,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:43,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:43,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:43,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:43,518 INFO L87 Difference]: Start difference. First operand 325 states and 872 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:44,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:44,487 INFO L93 Difference]: Finished difference Result 494 states and 1225 transitions. [2021-07-13 19:50:44,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:50:44,488 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:44,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:44,488 INFO L225 Difference]: With dead ends: 494 [2021-07-13 19:50:44,489 INFO L226 Difference]: Without dead ends: 490 [2021-07-13 19:50:44,489 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 938.8ms TimeCoverageRelationStatistics Valid=222, Invalid=1418, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:50:44,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-07-13 19:50:44,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 321. [2021-07-13 19:50:44,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.69375) internal successors, (862), 320 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:44,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 862 transitions. [2021-07-13 19:50:44,493 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 862 transitions. Word has length 19 [2021-07-13 19:50:44,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:44,493 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 862 transitions. [2021-07-13 19:50:44,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:44,493 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 862 transitions. [2021-07-13 19:50:44,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:44,493 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:44,493 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:44,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14715,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:44,694 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:44,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:44,694 INFO L82 PathProgramCache]: Analyzing trace with hash -2030990486, now seen corresponding path program 478 times [2021-07-13 19:50:44,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:44,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762946663] [2021-07-13 19:50:44,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:44,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:44,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:44,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:44,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762946663] [2021-07-13 19:50:44,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762946663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:44,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183175983] [2021-07-13 19:50:44,766 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:44,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:50:44,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:44,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:44,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:45,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:45,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:45,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:45,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:45,061 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:50:45,062 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:45,097 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:50:45,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:50:45,100 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:45,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:45,113 INFO L518 ElimStorePlain]: Eliminatee v_prenex_528 vanished before elimination [2021-07-13 19:50:45,113 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:45,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:50:45,124 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:50:45,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:45,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183175983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:45,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:45,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:50:45,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988102359] [2021-07-13 19:50:45,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:45,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:45,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:45,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:45,158 INFO L87 Difference]: Start difference. First operand 321 states and 862 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:45,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:45,696 INFO L93 Difference]: Finished difference Result 392 states and 990 transitions. [2021-07-13 19:50:45,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:50:45,696 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:45,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:45,697 INFO L225 Difference]: With dead ends: 392 [2021-07-13 19:50:45,697 INFO L226 Difference]: Without dead ends: 380 [2021-07-13 19:50:45,697 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 525.1ms TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:50:45,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-07-13 19:50:45,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 329. [2021-07-13 19:50:45,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.6951219512195124) internal successors, (884), 328 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:45,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 884 transitions. [2021-07-13 19:50:45,701 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 884 transitions. Word has length 19 [2021-07-13 19:50:45,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:45,701 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 884 transitions. [2021-07-13 19:50:45,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:45,701 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 884 transitions. [2021-07-13 19:50:45,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:45,701 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:45,701 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:45,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14726 [2021-07-13 19:50:45,902 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:45,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:45,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1288869109, now seen corresponding path program 479 times [2021-07-13 19:50:45,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:45,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046782369] [2021-07-13 19:50:45,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:45,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:45,976 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:45,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:45,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046782369] [2021-07-13 19:50:45,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046782369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:45,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646640331] [2021-07-13 19:50:45,977 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:46,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:50:46,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:46,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:46,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:46,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:46,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:46,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:50:46,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:46,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:46,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:46,142 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:46,163 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:50:46,163 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:46,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:50:46,164 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:50:46,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:46,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646640331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:46,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:46,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:50:46,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131848647] [2021-07-13 19:50:46,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:46,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:46,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:46,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:46,185 INFO L87 Difference]: Start difference. First operand 329 states and 884 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:46,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:46,525 INFO L93 Difference]: Finished difference Result 466 states and 1147 transitions. [2021-07-13 19:50:46,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:50:46,526 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:46,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:46,526 INFO L225 Difference]: With dead ends: 466 [2021-07-13 19:50:46,526 INFO L226 Difference]: Without dead ends: 466 [2021-07-13 19:50:46,526 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 288.7ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:50:46,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-07-13 19:50:46,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 330. [2021-07-13 19:50:46,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.6990881458966567) internal successors, (888), 329 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:46,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 888 transitions. [2021-07-13 19:50:46,530 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 888 transitions. Word has length 19 [2021-07-13 19:50:46,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:46,530 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 888 transitions. [2021-07-13 19:50:46,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:46,530 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 888 transitions. [2021-07-13 19:50:46,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:46,531 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:46,531 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:46,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14752,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:46,731 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:46,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:46,732 INFO L82 PathProgramCache]: Analyzing trace with hash 2023530662, now seen corresponding path program 480 times [2021-07-13 19:50:46,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:46,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047855607] [2021-07-13 19:50:46,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:46,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:46,800 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:46,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:46,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047855607] [2021-07-13 19:50:46,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047855607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:46,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743185512] [2021-07-13 19:50:46,800 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:46,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:50:46,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:46,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:46,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:46,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:50:46,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:46,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:46,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:46,985 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:47,026 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-07-13 19:50:47,026 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:47,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:50:47,029 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:47,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:47,044 INFO L518 ElimStorePlain]: Eliminatee v_prenex_531 vanished before elimination [2021-07-13 19:50:47,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:50:47,045 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:50:47,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:47,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743185512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:47,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:47,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:50:47,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007109686] [2021-07-13 19:50:47,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:47,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:47,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:47,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:47,105 INFO L87 Difference]: Start difference. First operand 330 states and 888 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:48,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:48,318 INFO L93 Difference]: Finished difference Result 537 states and 1234 transitions. [2021-07-13 19:50:48,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 19:50:48,318 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:48,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:48,318 INFO L225 Difference]: With dead ends: 537 [2021-07-13 19:50:48,319 INFO L226 Difference]: Without dead ends: 531 [2021-07-13 19:50:48,319 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1027.3ms TimeCoverageRelationStatistics Valid=294, Invalid=2058, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 19:50:48,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-07-13 19:50:48,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 336. [2021-07-13 19:50:48,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.716417910447761) internal successors, (910), 335 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:48,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 910 transitions. [2021-07-13 19:50:48,323 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 910 transitions. Word has length 19 [2021-07-13 19:50:48,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:48,323 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 910 transitions. [2021-07-13 19:50:48,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:48,323 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 910 transitions. [2021-07-13 19:50:48,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:48,323 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:48,323 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:48,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14756 [2021-07-13 19:50:48,524 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:48,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:48,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1770375397, now seen corresponding path program 481 times [2021-07-13 19:50:48,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:48,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911217085] [2021-07-13 19:50:48,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:48,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:48,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:48,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:48,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911217085] [2021-07-13 19:50:48,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911217085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:48,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324036241] [2021-07-13 19:50:48,596 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:48,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:48,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:48,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:48,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:48,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:48,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:50:48,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:48,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:48,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:48,797 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:48,823 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:50:48,823 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:48,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:50:48,824 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:50:48,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:48,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324036241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:48,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:48,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:50:48,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054699828] [2021-07-13 19:50:48,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:48,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:48,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:48,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:48,868 INFO L87 Difference]: Start difference. First operand 336 states and 910 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:49,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:49,450 INFO L93 Difference]: Finished difference Result 569 states and 1330 transitions. [2021-07-13 19:50:49,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:50:49,450 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:49,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:49,451 INFO L225 Difference]: With dead ends: 569 [2021-07-13 19:50:49,451 INFO L226 Difference]: Without dead ends: 563 [2021-07-13 19:50:49,451 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 512.2ms TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:50:49,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-07-13 19:50:49,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 336. [2021-07-13 19:50:49,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.716417910447761) internal successors, (910), 335 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:49,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 910 transitions. [2021-07-13 19:50:49,455 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 910 transitions. Word has length 19 [2021-07-13 19:50:49,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:49,455 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 910 transitions. [2021-07-13 19:50:49,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:49,455 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 910 transitions. [2021-07-13 19:50:49,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:49,456 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:49,456 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:49,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14775,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:49,656 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:49,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:49,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1323037674, now seen corresponding path program 482 times [2021-07-13 19:50:49,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:49,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299143339] [2021-07-13 19:50:49,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:49,724 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:49,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:49,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299143339] [2021-07-13 19:50:49,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299143339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:49,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686153869] [2021-07-13 19:50:49,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:49,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:49,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:49,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:49,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:49,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:49,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:49,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:49,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:49,903 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:50:49,903 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:49,939 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-07-13 19:50:49,939 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:49,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:50:49,942 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:49,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:49,957 INFO L518 ElimStorePlain]: Eliminatee v_prenex_533 vanished before elimination [2021-07-13 19:50:49,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:50:49,958 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:50:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:50,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686153869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:50,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:50,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:50:50,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099669523] [2021-07-13 19:50:50,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:50,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:50,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:50,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:50,010 INFO L87 Difference]: Start difference. First operand 336 states and 910 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:50,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:50,622 INFO L93 Difference]: Finished difference Result 428 states and 1071 transitions. [2021-07-13 19:50:50,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:50:50,622 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:50,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:50,623 INFO L225 Difference]: With dead ends: 428 [2021-07-13 19:50:50,623 INFO L226 Difference]: Without dead ends: 428 [2021-07-13 19:50:50,623 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 495.3ms TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:50:50,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-07-13 19:50:50,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 332. [2021-07-13 19:50:50,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.700906344410876) internal successors, (894), 331 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:50,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 894 transitions. [2021-07-13 19:50:50,627 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 894 transitions. Word has length 19 [2021-07-13 19:50:50,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:50,627 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 894 transitions. [2021-07-13 19:50:50,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:50,627 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 894 transitions. [2021-07-13 19:50:50,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:50,627 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:50,627 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:50,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14783,486 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:50,828 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:50,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:50,828 INFO L82 PathProgramCache]: Analyzing trace with hash -659759571, now seen corresponding path program 483 times [2021-07-13 19:50:50,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:50,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872320746] [2021-07-13 19:50:50,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:50,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:50,896 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:50,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:50,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872320746] [2021-07-13 19:50:50,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872320746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:50,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037410716] [2021-07-13 19:50:50,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:50,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:50:50,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:50,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:50,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:51,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:51,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:51,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:51,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:51,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:51,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:50:51,049 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:51,075 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:50:51,075 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:51,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:50:51,076 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:50:51,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:51,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037410716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:51,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:51,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:50:51,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958350545] [2021-07-13 19:50:51,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:51,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:51,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:51,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:51,141 INFO L87 Difference]: Start difference. First operand 332 states and 894 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:51,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:51,936 INFO L93 Difference]: Finished difference Result 524 states and 1244 transitions. [2021-07-13 19:50:51,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:50:51,937 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:51,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:51,937 INFO L225 Difference]: With dead ends: 524 [2021-07-13 19:50:51,937 INFO L226 Difference]: Without dead ends: 520 [2021-07-13 19:50:51,937 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 726.0ms TimeCoverageRelationStatistics Valid=209, Invalid=1513, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:50:51,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-07-13 19:50:51,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 329. [2021-07-13 19:50:51,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.701219512195122) internal successors, (886), 328 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:51,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 886 transitions. [2021-07-13 19:50:51,941 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 886 transitions. Word has length 19 [2021-07-13 19:50:51,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:51,942 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 886 transitions. [2021-07-13 19:50:51,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:51,942 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 886 transitions. [2021-07-13 19:50:51,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:51,942 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:51,942 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:52,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14800,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:52,143 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:52,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:52,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1683691312, now seen corresponding path program 484 times [2021-07-13 19:50:52,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:52,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716833035] [2021-07-13 19:50:52,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:52,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:52,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:50:52,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:52,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716833035] [2021-07-13 19:50:52,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716833035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:52,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148006932] [2021-07-13 19:50:52,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:52,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:50:52,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:52,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:52,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:52,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:52,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:52,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:50:52,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:52,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:52,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:52,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:52,348 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:52,350 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:50:52,351 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:52,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:50:52,354 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:52,386 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-07-13 19:50:52,386 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:52,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:50:52,387 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:50:52,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:52,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148006932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:52,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:52,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:50:52,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608570107] [2021-07-13 19:50:52,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:52,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:52,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:52,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:52,438 INFO L87 Difference]: Start difference. First operand 329 states and 886 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:53,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:53,895 INFO L93 Difference]: Finished difference Result 638 states and 1467 transitions. [2021-07-13 19:50:53,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 19:50:53,895 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:53,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:53,896 INFO L225 Difference]: With dead ends: 638 [2021-07-13 19:50:53,896 INFO L226 Difference]: Without dead ends: 632 [2021-07-13 19:50:53,896 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1167 ImplicationChecksByTransitivity, 1325.6ms TimeCoverageRelationStatistics Valid=460, Invalid=3322, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 19:50:53,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-07-13 19:50:53,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 343. [2021-07-13 19:50:53,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.7339181286549707) internal successors, (935), 342 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:53,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 935 transitions. [2021-07-13 19:50:53,900 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 935 transitions. Word has length 19 [2021-07-13 19:50:53,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:53,900 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 935 transitions. [2021-07-13 19:50:53,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:53,901 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 935 transitions. [2021-07-13 19:50:53,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:53,901 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:53,901 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:54,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14811 [2021-07-13 19:50:54,101 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:54,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:54,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1936846577, now seen corresponding path program 485 times [2021-07-13 19:50:54,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:54,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964192422] [2021-07-13 19:50:54,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:54,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:54,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:50:54,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:54,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964192422] [2021-07-13 19:50:54,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964192422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:54,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741354006] [2021-07-13 19:50:54,170 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:54,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:50:54,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:54,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:54,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:54,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:54,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:54,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:50:54,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:54,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:54,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:54,324 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:54,357 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:50:54,357 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:54,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:50:54,358 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:50:54,400 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:54,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741354006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:54,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:54,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:50:54,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426432610] [2021-07-13 19:50:54,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:54,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:54,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:54,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:54,401 INFO L87 Difference]: Start difference. First operand 343 states and 935 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:54,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:54,939 INFO L93 Difference]: Finished difference Result 481 states and 1167 transitions. [2021-07-13 19:50:54,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:50:54,939 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:54,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:54,940 INFO L225 Difference]: With dead ends: 481 [2021-07-13 19:50:54,940 INFO L226 Difference]: Without dead ends: 475 [2021-07-13 19:50:54,940 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 514.6ms TimeCoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:50:54,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-07-13 19:50:54,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 340. [2021-07-13 19:50:54,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.7227138643067845) internal successors, (923), 339 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:54,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 923 transitions. [2021-07-13 19:50:54,944 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 923 transitions. Word has length 19 [2021-07-13 19:50:54,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:54,944 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 923 transitions. [2021-07-13 19:50:54,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:54,944 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 923 transitions. [2021-07-13 19:50:54,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:54,944 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:54,944 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:55,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14823,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:55,145 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:55,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:55,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1910782996, now seen corresponding path program 486 times [2021-07-13 19:50:55,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:55,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522258268] [2021-07-13 19:50:55,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:55,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:55,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:50:55,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:55,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522258268] [2021-07-13 19:50:55,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522258268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:55,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055948080] [2021-07-13 19:50:55,214 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:55,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:50:55,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:55,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:55,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:55,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:55,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:55,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:55,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:55,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:55,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:55,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:50:55,354 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:55,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:50:55,357 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:55,358 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:50:55,359 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:55,391 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-07-13 19:50:55,391 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:55,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:50:55,392 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:50:55,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:55,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055948080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:55,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:55,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:50:55,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822665426] [2021-07-13 19:50:55,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:55,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:55,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:55,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:55,434 INFO L87 Difference]: Start difference. First operand 340 states and 923 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:56,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:56,205 INFO L93 Difference]: Finished difference Result 546 states and 1309 transitions. [2021-07-13 19:50:56,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:50:56,205 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:56,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:56,206 INFO L225 Difference]: With dead ends: 546 [2021-07-13 19:50:56,206 INFO L226 Difference]: Without dead ends: 546 [2021-07-13 19:50:56,206 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 687.3ms TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:50:56,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-07-13 19:50:56,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 331. [2021-07-13 19:50:56,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.687878787878788) internal successors, (887), 330 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:56,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 887 transitions. [2021-07-13 19:50:56,210 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 887 transitions. Word has length 19 [2021-07-13 19:50:56,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:56,210 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 887 transitions. [2021-07-13 19:50:56,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:56,210 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 887 transitions. [2021-07-13 19:50:56,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:56,210 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:56,210 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:56,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14833 [2021-07-13 19:50:56,411 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:56,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:56,411 INFO L82 PathProgramCache]: Analyzing trace with hash -72014249, now seen corresponding path program 487 times [2021-07-13 19:50:56,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:56,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164605400] [2021-07-13 19:50:56,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:56,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:56,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:50:56,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:56,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164605400] [2021-07-13 19:50:56,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164605400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:56,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478644553] [2021-07-13 19:50:56,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:56,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:56,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:56,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:56,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:56,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:56,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:56,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:56,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:56,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:50:56,638 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:56,666 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:50:56,667 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:56,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:50:56,667 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:50:56,730 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:56,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478644553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:56,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:56,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:50:56,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673833487] [2021-07-13 19:50:56,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:56,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:56,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:56,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:56,731 INFO L87 Difference]: Start difference. First operand 331 states and 887 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:57,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:57,495 INFO L93 Difference]: Finished difference Result 437 states and 1068 transitions. [2021-07-13 19:50:57,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:50:57,495 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:57,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:57,496 INFO L225 Difference]: With dead ends: 437 [2021-07-13 19:50:57,496 INFO L226 Difference]: Without dead ends: 433 [2021-07-13 19:50:57,496 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 720.6ms TimeCoverageRelationStatistics Valid=183, Invalid=1149, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:50:57,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-07-13 19:50:57,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 328. [2021-07-13 19:50:57,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.685015290519878) internal successors, (878), 327 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:57,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 878 transitions. [2021-07-13 19:50:57,500 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 878 transitions. Word has length 19 [2021-07-13 19:50:57,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:57,500 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 878 transitions. [2021-07-13 19:50:57,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:57,501 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 878 transitions. [2021-07-13 19:50:57,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:57,501 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:57,501 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:57,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14842,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:57,702 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:57,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:57,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1375553194, now seen corresponding path program 488 times [2021-07-13 19:50:57,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:57,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109900551] [2021-07-13 19:50:57,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:57,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:57,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:50:57,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:57,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109900551] [2021-07-13 19:50:57,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109900551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:57,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183827378] [2021-07-13 19:50:57,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:57,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:57,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:57,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:57,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:57,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:57,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:57,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:57,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:57,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:57,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:50:57,914 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:57,935 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-07-13 19:50:57,935 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:57,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:50:57,936 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-07-13 19:50:57,957 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:57,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183827378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:57,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:57,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:50:57,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118115292] [2021-07-13 19:50:57,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:57,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:57,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:57,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:57,958 INFO L87 Difference]: Start difference. First operand 328 states and 878 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:58,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:58,332 INFO L93 Difference]: Finished difference Result 446 states and 1101 transitions. [2021-07-13 19:50:58,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:50:58,332 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:58,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:58,333 INFO L225 Difference]: With dead ends: 446 [2021-07-13 19:50:58,333 INFO L226 Difference]: Without dead ends: 446 [2021-07-13 19:50:58,333 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 346.4ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:50:58,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-07-13 19:50:58,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 320. [2021-07-13 19:50:58,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.664576802507837) internal successors, (850), 319 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:58,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 850 transitions. [2021-07-13 19:50:58,337 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 850 transitions. Word has length 19 [2021-07-13 19:50:58,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:58,337 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 850 transitions. [2021-07-13 19:50:58,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:58,337 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 850 transitions. [2021-07-13 19:50:58,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:58,337 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:58,337 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:58,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14861,492 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:58,538 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:58,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:58,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1003696907, now seen corresponding path program 489 times [2021-07-13 19:50:58,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:58,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014553970] [2021-07-13 19:50:58,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:58,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:58,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:50:58,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:58,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014553970] [2021-07-13 19:50:58,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014553970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:58,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198912463] [2021-07-13 19:50:58,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:58,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:50:58,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:58,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:58,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:58,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:50:58,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:58,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:50:58,787 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:58,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:58,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:50:58,790 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:58,823 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-07-13 19:50:58,824 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:58,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:50:58,824 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-07-13 19:50:58,851 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:58,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198912463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:58,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:58,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:50:58,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759542126] [2021-07-13 19:50:58,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:50:58,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:58,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:50:58,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:58,852 INFO L87 Difference]: Start difference. First operand 320 states and 850 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:59,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:59,213 INFO L93 Difference]: Finished difference Result 350 states and 905 transitions. [2021-07-13 19:50:59,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:50:59,213 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:50:59,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:59,213 INFO L225 Difference]: With dead ends: 350 [2021-07-13 19:50:59,213 INFO L226 Difference]: Without dead ends: 342 [2021-07-13 19:50:59,214 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 387.9ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:50:59,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-07-13 19:50:59,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 316. [2021-07-13 19:50:59,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.6634920634920634) internal successors, (839), 315 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:59,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 839 transitions. [2021-07-13 19:50:59,217 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 839 transitions. Word has length 19 [2021-07-13 19:50:59,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:59,217 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 839 transitions. [2021-07-13 19:50:59,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:59,217 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 839 transitions. [2021-07-13 19:50:59,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:50:59,217 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:59,218 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:59,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 493 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14865 [2021-07-13 19:50:59,418 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:59,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:59,418 INFO L82 PathProgramCache]: Analyzing trace with hash -643455514, now seen corresponding path program 490 times [2021-07-13 19:50:59,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:59,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586598607] [2021-07-13 19:50:59,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:59,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:59,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:59,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:59,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586598607] [2021-07-13 19:50:59,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586598607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:59,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237322651] [2021-07-13 19:50:59,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:59,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:50:59,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:59,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:50:59,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:59,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:59,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:59,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:50:59,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:59,640 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:50:59,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:59,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:59,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:50:59,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:50:59,644 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:59,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:50:59,647 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:59,679 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-07-13 19:50:59,679 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:50:59,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:50:59,680 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:50:59,731 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:59,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237322651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:59,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:59,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:50:59,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137715299] [2021-07-13 19:50:59,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:50:59,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:59,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:50:59,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:50:59,732 INFO L87 Difference]: Start difference. First operand 316 states and 839 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:00,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:00,883 INFO L93 Difference]: Finished difference Result 496 states and 1216 transitions. [2021-07-13 19:51:00,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 19:51:00,883 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:00,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:00,884 INFO L225 Difference]: With dead ends: 496 [2021-07-13 19:51:00,884 INFO L226 Difference]: Without dead ends: 490 [2021-07-13 19:51:00,884 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1084.2ms TimeCoverageRelationStatistics Valid=293, Invalid=2059, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 19:51:00,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-07-13 19:51:00,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 334. [2021-07-13 19:51:00,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.6996996996997) internal successors, (899), 333 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:00,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 899 transitions. [2021-07-13 19:51:00,888 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 899 transitions. Word has length 19 [2021-07-13 19:51:00,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:00,888 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 899 transitions. [2021-07-13 19:51:00,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:00,888 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 899 transitions. [2021-07-13 19:51:00,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:00,889 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:00,889 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:01,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14878 [2021-07-13 19:51:01,089 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:01,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:01,089 INFO L82 PathProgramCache]: Analyzing trace with hash -896610779, now seen corresponding path program 491 times [2021-07-13 19:51:01,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:01,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949579614] [2021-07-13 19:51:01,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:01,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:01,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:01,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:01,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949579614] [2021-07-13 19:51:01,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949579614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:01,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742260569] [2021-07-13 19:51:01,170 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:01,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:51:01,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:01,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:01,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:01,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:01,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:01,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:01,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:01,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:01,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:01,349 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:01,377 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:51:01,378 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:01,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:51:01,378 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:51:01,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:01,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742260569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:01,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:01,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:51:01,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799408219] [2021-07-13 19:51:01,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:51:01,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:01,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:51:01,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:51:01,427 INFO L87 Difference]: Start difference. First operand 334 states and 899 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:01,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:01,975 INFO L93 Difference]: Finished difference Result 430 states and 1080 transitions. [2021-07-13 19:51:01,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:51:01,975 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:01,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:01,975 INFO L225 Difference]: With dead ends: 430 [2021-07-13 19:51:01,975 INFO L226 Difference]: Without dead ends: 430 [2021-07-13 19:51:01,976 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 489.3ms TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:51:01,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-07-13 19:51:01,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 334. [2021-07-13 19:51:01,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.6996996996997) internal successors, (899), 333 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:01,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 899 transitions. [2021-07-13 19:51:01,986 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 899 transitions. Word has length 19 [2021-07-13 19:51:01,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:01,986 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 899 transitions. [2021-07-13 19:51:01,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:01,986 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 899 transitions. [2021-07-13 19:51:01,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:01,986 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:01,986 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:02,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14890 [2021-07-13 19:51:02,187 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:02,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:02,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1343948502, now seen corresponding path program 492 times [2021-07-13 19:51:02,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:02,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677744928] [2021-07-13 19:51:02,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:02,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:02,274 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:02,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:02,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677744928] [2021-07-13 19:51:02,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677744928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:02,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943711925] [2021-07-13 19:51:02,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:02,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:51:02,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:02,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:02,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:02,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:02,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:02,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:02,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:02,415 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:51:02,416 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:02,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:51:02,419 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:02,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:02,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:02,422 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:02,454 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-07-13 19:51:02,454 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:02,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:51:02,455 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:51:02,498 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:02,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943711925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:02,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:02,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:51:02,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101386355] [2021-07-13 19:51:02,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:51:02,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:02,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:51:02,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:51:02,499 INFO L87 Difference]: Start difference. First operand 334 states and 899 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:03,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:03,403 INFO L93 Difference]: Finished difference Result 529 states and 1272 transitions. [2021-07-13 19:51:03,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:51:03,404 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:03,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:03,404 INFO L225 Difference]: With dead ends: 529 [2021-07-13 19:51:03,404 INFO L226 Difference]: Without dead ends: 529 [2021-07-13 19:51:03,405 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 818.1ms TimeCoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:51:03,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-07-13 19:51:03,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 332. [2021-07-13 19:51:03,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.691842900302115) internal successors, (891), 331 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:03,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 891 transitions. [2021-07-13 19:51:03,409 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 891 transitions. Word has length 19 [2021-07-13 19:51:03,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:03,409 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 891 transitions. [2021-07-13 19:51:03,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:03,409 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 891 transitions. [2021-07-13 19:51:03,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:03,409 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:03,409 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:03,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14906,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:03,610 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:03,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:03,610 INFO L82 PathProgramCache]: Analyzing trace with hash 968221549, now seen corresponding path program 493 times [2021-07-13 19:51:03,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:03,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743535623] [2021-07-13 19:51:03,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:03,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:03,687 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:03,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:03,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743535623] [2021-07-13 19:51:03,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743535623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:03,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141934105] [2021-07-13 19:51:03,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:03,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:03,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:03,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:03,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:03,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:03,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:03,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:03,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:03,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:03,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:03,884 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:51:03,885 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:03,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:51:03,885 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:51:03,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:03,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141934105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:03,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:03,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:51:03,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454697396] [2021-07-13 19:51:03,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:51:03,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:03,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:51:03,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:51:03,951 INFO L87 Difference]: Start difference. First operand 332 states and 891 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:04,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:04,591 INFO L93 Difference]: Finished difference Result 424 states and 1058 transitions. [2021-07-13 19:51:04,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:51:04,591 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:04,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:04,592 INFO L225 Difference]: With dead ends: 424 [2021-07-13 19:51:04,592 INFO L226 Difference]: Without dead ends: 420 [2021-07-13 19:51:04,592 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 632.3ms TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:51:04,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-07-13 19:51:04,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 330. [2021-07-13 19:51:04,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.689969604863222) internal successors, (885), 329 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:04,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 885 transitions. [2021-07-13 19:51:04,595 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 885 transitions. Word has length 19 [2021-07-13 19:51:04,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:04,596 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 885 transitions. [2021-07-13 19:51:04,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:04,596 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 885 transitions. [2021-07-13 19:51:04,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:04,596 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:04,596 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:04,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14916 [2021-07-13 19:51:04,797 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:04,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:04,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1879178304, now seen corresponding path program 494 times [2021-07-13 19:51:04,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:04,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107409584] [2021-07-13 19:51:04,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:04,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:04,876 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:04,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:04,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107409584] [2021-07-13 19:51:04,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107409584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:04,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742501259] [2021-07-13 19:51:04,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:04,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:51:04,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:04,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:04,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:05,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:05,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:05,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:05,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:05,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:05,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:05,022 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:05,043 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-07-13 19:51:05,043 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:05,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:05,044 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-07-13 19:51:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:05,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742501259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:05,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:05,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:51:05,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652016976] [2021-07-13 19:51:05,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:51:05,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:05,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:51:05,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:51:05,067 INFO L87 Difference]: Start difference. First operand 330 states and 885 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:05,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:05,558 INFO L93 Difference]: Finished difference Result 447 states and 1108 transitions. [2021-07-13 19:51:05,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:51:05,559 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:05,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:05,559 INFO L225 Difference]: With dead ends: 447 [2021-07-13 19:51:05,559 INFO L226 Difference]: Without dead ends: 447 [2021-07-13 19:51:05,560 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 472.8ms TimeCoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:51:05,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-07-13 19:51:05,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 326. [2021-07-13 19:51:05,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.68) internal successors, (871), 325 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:05,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 871 transitions. [2021-07-13 19:51:05,563 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 871 transitions. Word has length 19 [2021-07-13 19:51:05,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:05,563 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 871 transitions. [2021-07-13 19:51:05,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:05,563 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 871 transitions. [2021-07-13 19:51:05,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:05,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:05,564 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:05,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14929,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:05,764 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:05,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:05,765 INFO L82 PathProgramCache]: Analyzing trace with hash 2043932705, now seen corresponding path program 495 times [2021-07-13 19:51:05,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:05,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372834636] [2021-07-13 19:51:05,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:05,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:05,844 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:05,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:05,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372834636] [2021-07-13 19:51:05,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372834636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:05,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531124686] [2021-07-13 19:51:05,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:05,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:51:05,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:05,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:05,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:06,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:51:06,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:06,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:06,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:06,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:06,030 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:06,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:51:06,032 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:06,067 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-07-13 19:51:06,067 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:06,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:51:06,068 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-07-13 19:51:06,095 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:06,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531124686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:06,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:06,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:51:06,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698291029] [2021-07-13 19:51:06,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:51:06,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:06,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:51:06,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:51:06,096 INFO L87 Difference]: Start difference. First operand 326 states and 871 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:06,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:06,468 INFO L93 Difference]: Finished difference Result 366 states and 944 transitions. [2021-07-13 19:51:06,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:51:06,468 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:06,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:06,469 INFO L225 Difference]: With dead ends: 366 [2021-07-13 19:51:06,469 INFO L226 Difference]: Without dead ends: 358 [2021-07-13 19:51:06,469 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 395.7ms TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:51:06,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-07-13 19:51:06,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 324. [2021-07-13 19:51:06,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.678018575851393) internal successors, (865), 323 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:06,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 865 transitions. [2021-07-13 19:51:06,472 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 865 transitions. Word has length 19 [2021-07-13 19:51:06,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:06,472 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 865 transitions. [2021-07-13 19:51:06,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:06,472 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 865 transitions. [2021-07-13 19:51:06,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:06,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:06,473 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:06,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 499 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14933 [2021-07-13 19:51:06,673 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:06,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:06,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1291432982, now seen corresponding path program 496 times [2021-07-13 19:51:06,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:06,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203280268] [2021-07-13 19:51:06,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:06,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:06,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:06,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203280268] [2021-07-13 19:51:06,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203280268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:06,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2187994] [2021-07-13 19:51:06,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:06,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:51:06,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:06,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:06,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:06,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:06,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:06,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:06,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:06,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:06,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:06,898 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:06,918 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-07-13 19:51:06,918 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:06,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:06,919 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-07-13 19:51:06,941 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:06,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2187994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:06,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:06,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:51:06,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908520013] [2021-07-13 19:51:06,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:51:06,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:06,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:51:06,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:51:06,942 INFO L87 Difference]: Start difference. First operand 324 states and 865 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:07,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:07,241 INFO L93 Difference]: Finished difference Result 405 states and 1018 transitions. [2021-07-13 19:51:07,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:51:07,242 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:07,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:07,242 INFO L225 Difference]: With dead ends: 405 [2021-07-13 19:51:07,242 INFO L226 Difference]: Without dead ends: 405 [2021-07-13 19:51:07,242 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 277.2ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:51:07,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-07-13 19:51:07,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 320. [2021-07-13 19:51:07,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.6677115987460813) internal successors, (851), 319 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:07,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 851 transitions. [2021-07-13 19:51:07,249 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 851 transitions. Word has length 19 [2021-07-13 19:51:07,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:07,250 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 851 transitions. [2021-07-13 19:51:07,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:07,250 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 851 transitions. [2021-07-13 19:51:07,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:07,250 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:07,250 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:07,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14946 [2021-07-13 19:51:07,451 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:07,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:07,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1031240173, now seen corresponding path program 497 times [2021-07-13 19:51:07,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:07,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053313592] [2021-07-13 19:51:07,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:07,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:07,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:07,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:07,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053313592] [2021-07-13 19:51:07,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053313592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:07,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022452104] [2021-07-13 19:51:07,531 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:07,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:51:07,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:07,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:07,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:07,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:51:07,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:07,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:51:07,714 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:07,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:07,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:07,717 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:07,751 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-07-13 19:51:07,751 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:07,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:51:07,752 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-07-13 19:51:07,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:07,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022452104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:07,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:07,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:51:07,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572769794] [2021-07-13 19:51:07,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:51:07,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:07,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:51:07,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:51:07,780 INFO L87 Difference]: Start difference. First operand 320 states and 851 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:08,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:08,013 INFO L93 Difference]: Finished difference Result 359 states and 921 transitions. [2021-07-13 19:51:08,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:51:08,014 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:08,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:08,014 INFO L225 Difference]: With dead ends: 359 [2021-07-13 19:51:08,014 INFO L226 Difference]: Without dead ends: 347 [2021-07-13 19:51:08,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 278.1ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:51:08,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-07-13 19:51:08,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 320. [2021-07-13 19:51:08,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.6614420062695925) internal successors, (849), 319 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:08,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 849 transitions. [2021-07-13 19:51:08,018 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 849 transitions. Word has length 19 [2021-07-13 19:51:08,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:08,018 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 849 transitions. [2021-07-13 19:51:08,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:08,018 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 849 transitions. [2021-07-13 19:51:08,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:08,018 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:08,018 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:08,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 501 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14950 [2021-07-13 19:51:08,219 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:08,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:08,219 INFO L82 PathProgramCache]: Analyzing trace with hash -81901800, now seen corresponding path program 498 times [2021-07-13 19:51:08,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:08,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772930302] [2021-07-13 19:51:08,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:08,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:08,303 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:08,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:08,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772930302] [2021-07-13 19:51:08,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772930302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:08,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991264541] [2021-07-13 19:51:08,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:08,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:51:08,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:08,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:08,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:08,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:08,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:08,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:08,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:08,663 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:51:08,664 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:08,698 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:51:08,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:51:08,701 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:08,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:08,714 INFO L518 ElimStorePlain]: Eliminatee v_prenex_539 vanished before elimination [2021-07-13 19:51:08,714 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:08,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:51:08,715 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:51:08,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:08,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991264541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:08,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:08,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:51:08,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501590712] [2021-07-13 19:51:08,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:08,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:08,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:08,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:08,745 INFO L87 Difference]: Start difference. First operand 320 states and 849 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:09,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:09,140 INFO L93 Difference]: Finished difference Result 460 states and 1081 transitions. [2021-07-13 19:51:09,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:51:09,140 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:09,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:09,141 INFO L225 Difference]: With dead ends: 460 [2021-07-13 19:51:09,141 INFO L226 Difference]: Without dead ends: 436 [2021-07-13 19:51:09,141 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 483.4ms TimeCoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:51:09,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-07-13 19:51:09,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 342. [2021-07-13 19:51:09,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.6422287390029324) internal successors, (901), 341 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:09,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 901 transitions. [2021-07-13 19:51:09,145 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 901 transitions. Word has length 19 [2021-07-13 19:51:09,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:09,145 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 901 transitions. [2021-07-13 19:51:09,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:09,145 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 901 transitions. [2021-07-13 19:51:09,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:09,146 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:09,146 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:09,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14963 [2021-07-13 19:51:09,346 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:09,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:09,346 INFO L82 PathProgramCache]: Analyzing trace with hash 132170361, now seen corresponding path program 499 times [2021-07-13 19:51:09,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:09,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552604416] [2021-07-13 19:51:09,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:09,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:09,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:09,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:09,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552604416] [2021-07-13 19:51:09,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552604416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:09,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73069950] [2021-07-13 19:51:09,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:09,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:09,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:09,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:09,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:09,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:09,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:09,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:09,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:09,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:09,629 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:09,650 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:51:09,650 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:09,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:09,651 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:51:09,673 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:09,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73069950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:09,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:09,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:51:09,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122940559] [2021-07-13 19:51:09,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:09,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:09,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:09,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:09,674 INFO L87 Difference]: Start difference. First operand 342 states and 901 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:09,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:09,973 INFO L93 Difference]: Finished difference Result 508 states and 1198 transitions. [2021-07-13 19:51:09,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:51:09,974 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:09,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:09,974 INFO L225 Difference]: With dead ends: 508 [2021-07-13 19:51:09,974 INFO L226 Difference]: Without dead ends: 508 [2021-07-13 19:51:09,974 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 246.9ms TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:51:09,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-07-13 19:51:09,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 351. [2021-07-13 19:51:09,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.657142857142857) internal successors, (930), 350 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:09,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 930 transitions. [2021-07-13 19:51:09,979 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 930 transitions. Word has length 19 [2021-07-13 19:51:09,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:09,979 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 930 transitions. [2021-07-13 19:51:09,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:09,979 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 930 transitions. [2021-07-13 19:51:09,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:09,979 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:09,979 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:10,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14990,503 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:10,180 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:10,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:10,180 INFO L82 PathProgramCache]: Analyzing trace with hash 777583956, now seen corresponding path program 500 times [2021-07-13 19:51:10,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:10,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324022981] [2021-07-13 19:51:10,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:10,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:10,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:10,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:10,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324022981] [2021-07-13 19:51:10,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324022981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:10,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157388677] [2021-07-13 19:51:10,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:10,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:51:10,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:10,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:10,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:10,623 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:51:10,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:10,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:10,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:10,627 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:10,662 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:51:10,663 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:10,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:51:10,665 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:10,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:10,679 INFO L518 ElimStorePlain]: Eliminatee v_prenex_545 vanished before elimination [2021-07-13 19:51:10,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:51:10,680 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:51:10,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:10,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157388677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:10,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:10,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:51:10,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750479438] [2021-07-13 19:51:10,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:10,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:10,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:10,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:10,709 INFO L87 Difference]: Start difference. First operand 351 states and 930 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:11,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:11,403 INFO L93 Difference]: Finished difference Result 503 states and 1168 transitions. [2021-07-13 19:51:11,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:51:11,403 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:11,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:11,404 INFO L225 Difference]: With dead ends: 503 [2021-07-13 19:51:11,404 INFO L226 Difference]: Without dead ends: 476 [2021-07-13 19:51:11,404 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 651.2ms TimeCoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:51:11,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-07-13 19:51:11,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 353. [2021-07-13 19:51:11,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.65625) internal successors, (935), 352 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:11,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 935 transitions. [2021-07-13 19:51:11,408 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 935 transitions. Word has length 19 [2021-07-13 19:51:11,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:11,408 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 935 transitions. [2021-07-13 19:51:11,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:11,409 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 935 transitions. [2021-07-13 19:51:11,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:11,409 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:11,409 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:11,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 504 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14994 [2021-07-13 19:51:11,609 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:11,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:11,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1986457133, now seen corresponding path program 501 times [2021-07-13 19:51:11,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:11,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964730225] [2021-07-13 19:51:11,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:11,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:11,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:11,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964730225] [2021-07-13 19:51:11,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964730225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:11,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279538398] [2021-07-13 19:51:11,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:11,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:51:11,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:11,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:11,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:11,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:11,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:11,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:11,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:11,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:11,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:11,941 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:11,961 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:51:11,961 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:11,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:11,962 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:51:11,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:11,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279538398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:11,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:11,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:51:11,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115829448] [2021-07-13 19:51:11,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:11,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:11,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:11,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:11,985 INFO L87 Difference]: Start difference. First operand 353 states and 935 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:12,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:12,531 INFO L93 Difference]: Finished difference Result 565 states and 1323 transitions. [2021-07-13 19:51:12,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:51:12,531 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:12,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:12,532 INFO L225 Difference]: With dead ends: 565 [2021-07-13 19:51:12,532 INFO L226 Difference]: Without dead ends: 556 [2021-07-13 19:51:12,532 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 476.1ms TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:51:12,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-07-13 19:51:12,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 344. [2021-07-13 19:51:12,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.6588921282798834) internal successors, (912), 343 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:12,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 912 transitions. [2021-07-13 19:51:12,536 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 912 transitions. Word has length 19 [2021-07-13 19:51:12,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:12,536 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 912 transitions. [2021-07-13 19:51:12,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:12,536 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 912 transitions. [2021-07-13 19:51:12,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:12,537 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:12,537 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:12,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15020 [2021-07-13 19:51:12,737 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:12,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:12,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1913687960, now seen corresponding path program 502 times [2021-07-13 19:51:12,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:12,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85901740] [2021-07-13 19:51:12,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:12,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:12,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:12,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:12,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85901740] [2021-07-13 19:51:12,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85901740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:12,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755672397] [2021-07-13 19:51:12,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:12,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:51:12,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:12,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:12,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:13,205 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:51:13,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:13,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:13,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:13,209 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:13,259 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:51:13,259 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:13,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:51:13,262 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:13,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:13,275 INFO L518 ElimStorePlain]: Eliminatee v_prenex_551 vanished before elimination [2021-07-13 19:51:13,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:51:13,276 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:51:13,304 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:13,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755672397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:13,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:13,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:51:13,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347447862] [2021-07-13 19:51:13,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:13,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:13,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:13,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:13,305 INFO L87 Difference]: Start difference. First operand 344 states and 912 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:13,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:13,952 INFO L93 Difference]: Finished difference Result 465 states and 1094 transitions. [2021-07-13 19:51:13,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:51:13,953 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:13,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:13,953 INFO L225 Difference]: With dead ends: 465 [2021-07-13 19:51:13,953 INFO L226 Difference]: Without dead ends: 447 [2021-07-13 19:51:13,953 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 645.9ms TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:51:13,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-07-13 19:51:13,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 344. [2021-07-13 19:51:13,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.6501457725947524) internal successors, (909), 343 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:13,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 909 transitions. [2021-07-13 19:51:13,957 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 909 transitions. Word has length 19 [2021-07-13 19:51:13,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:13,957 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 909 transitions. [2021-07-13 19:51:13,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:13,958 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 909 transitions. [2021-07-13 19:51:13,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:13,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:13,958 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:14,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15024,506 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:14,158 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:14,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:14,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1639157959, now seen corresponding path program 503 times [2021-07-13 19:51:14,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:14,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978401658] [2021-07-13 19:51:14,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:14,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:14,247 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:14,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:14,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978401658] [2021-07-13 19:51:14,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978401658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:14,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842501271] [2021-07-13 19:51:14,248 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:14,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:51:14,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:14,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:14,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:14,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:14,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:14,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:14,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:14,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:14,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:14,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:14,482 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:51:14,482 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:14,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:14,483 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:51:14,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:14,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842501271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:14,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:14,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:51:14,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866644215] [2021-07-13 19:51:14,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:14,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:14,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:14,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:14,506 INFO L87 Difference]: Start difference. First operand 344 states and 909 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:15,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:15,547 INFO L93 Difference]: Finished difference Result 515 states and 1189 transitions. [2021-07-13 19:51:15,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:51:15,548 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:15,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:15,548 INFO L225 Difference]: With dead ends: 515 [2021-07-13 19:51:15,548 INFO L226 Difference]: Without dead ends: 497 [2021-07-13 19:51:15,549 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 913.9ms TimeCoverageRelationStatistics Valid=199, Invalid=1207, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:51:15,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-07-13 19:51:15,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 315. [2021-07-13 19:51:15,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.6178343949044587) internal successors, (822), 314 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:15,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 822 transitions. [2021-07-13 19:51:15,553 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 822 transitions. Word has length 19 [2021-07-13 19:51:15,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:15,553 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 822 transitions. [2021-07-13 19:51:15,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:15,553 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 822 transitions. [2021-07-13 19:51:15,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:15,553 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:15,553 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:15,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15040 [2021-07-13 19:51:15,754 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:15,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:15,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1673241812, now seen corresponding path program 504 times [2021-07-13 19:51:15,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:15,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110061471] [2021-07-13 19:51:15,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:15,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:15,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:15,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:15,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110061471] [2021-07-13 19:51:15,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110061471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:15,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354257789] [2021-07-13 19:51:15,836 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:15,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:51:15,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:15,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:15,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:16,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:51:16,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:16,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:16,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:16,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:16,108 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-07-13 19:51:16,108 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:16,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:51:16,111 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:16,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:16,125 INFO L518 ElimStorePlain]: Eliminatee v_prenex_554 vanished before elimination [2021-07-13 19:51:16,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:51:16,126 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:51:16,189 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:16,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354257789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:16,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:16,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:51:16,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260061146] [2021-07-13 19:51:16,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:16,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:16,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:16,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:16,190 INFO L87 Difference]: Start difference. First operand 315 states and 822 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:17,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:17,182 INFO L93 Difference]: Finished difference Result 485 states and 1081 transitions. [2021-07-13 19:51:17,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:51:17,183 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:17,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:17,183 INFO L225 Difference]: With dead ends: 485 [2021-07-13 19:51:17,183 INFO L226 Difference]: Without dead ends: 476 [2021-07-13 19:51:17,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 858.7ms TimeCoverageRelationStatistics Valid=196, Invalid=1364, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:51:17,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-07-13 19:51:17,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 320. [2021-07-13 19:51:17,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.633228840125392) internal successors, (840), 319 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:17,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 840 transitions. [2021-07-13 19:51:17,187 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 840 transitions. Word has length 19 [2021-07-13 19:51:17,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:17,187 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 840 transitions. [2021-07-13 19:51:17,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:17,187 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 840 transitions. [2021-07-13 19:51:17,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:17,188 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:17,188 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:17,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15044,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:17,388 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:17,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:17,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1420086547, now seen corresponding path program 505 times [2021-07-13 19:51:17,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:17,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085139436] [2021-07-13 19:51:17,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:17,493 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:17,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:17,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085139436] [2021-07-13 19:51:17,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085139436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:17,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82375588] [2021-07-13 19:51:17,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:17,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:17,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:17,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:17,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:17,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:17,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:17,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:17,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:17,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:17,697 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:17,722 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:51:17,722 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:17,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:51:17,723 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:51:17,771 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:17,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82375588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:17,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:17,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:51:17,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051182989] [2021-07-13 19:51:17,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:17,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:17,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:17,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:17,772 INFO L87 Difference]: Start difference. First operand 320 states and 840 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:18,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:18,824 INFO L93 Difference]: Finished difference Result 488 states and 1101 transitions. [2021-07-13 19:51:18,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:51:18,825 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:18,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:18,825 INFO L225 Difference]: With dead ends: 488 [2021-07-13 19:51:18,825 INFO L226 Difference]: Without dead ends: 479 [2021-07-13 19:51:18,825 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1052.0ms TimeCoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:51:18,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-07-13 19:51:18,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 313. [2021-07-13 19:51:18,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.6153846153846154) internal successors, (816), 312 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:18,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 816 transitions. [2021-07-13 19:51:18,829 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 816 transitions. Word has length 19 [2021-07-13 19:51:18,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:18,829 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 816 transitions. [2021-07-13 19:51:18,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:18,829 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 816 transitions. [2021-07-13 19:51:18,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:18,830 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:18,830 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:19,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15057,509 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:19,030 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:19,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:19,030 INFO L82 PathProgramCache]: Analyzing trace with hash 972748824, now seen corresponding path program 506 times [2021-07-13 19:51:19,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:19,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294247240] [2021-07-13 19:51:19,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:19,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:19,112 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:19,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:19,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294247240] [2021-07-13 19:51:19,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294247240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:19,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459693797] [2021-07-13 19:51:19,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:19,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:51:19,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:19,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:19,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:19,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:51:19,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:19,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:19,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:19,344 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:19,385 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-07-13 19:51:19,385 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:19,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:51:19,388 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:19,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:19,402 INFO L518 ElimStorePlain]: Eliminatee v_prenex_557 vanished before elimination [2021-07-13 19:51:19,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:51:19,403 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:51:19,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:19,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459693797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:19,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:19,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:51:19,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641503498] [2021-07-13 19:51:19,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:19,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:19,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:19,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:19,460 INFO L87 Difference]: Start difference. First operand 313 states and 816 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:19,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:19,845 INFO L93 Difference]: Finished difference Result 403 states and 946 transitions. [2021-07-13 19:51:19,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:51:19,845 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:19,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:19,845 INFO L225 Difference]: With dead ends: 403 [2021-07-13 19:51:19,845 INFO L226 Difference]: Without dead ends: 401 [2021-07-13 19:51:19,846 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 414.8ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:51:19,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-07-13 19:51:19,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 310. [2021-07-13 19:51:19,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.6019417475728157) internal successors, (804), 309 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:19,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 804 transitions. [2021-07-13 19:51:19,849 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 804 transitions. Word has length 19 [2021-07-13 19:51:19,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:19,849 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 804 transitions. [2021-07-13 19:51:19,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:19,849 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 804 transitions. [2021-07-13 19:51:19,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:19,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:19,850 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:20,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15065 [2021-07-13 19:51:20,050 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:20,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:20,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1010048421, now seen corresponding path program 507 times [2021-07-13 19:51:20,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:20,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000601946] [2021-07-13 19:51:20,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:20,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:20,131 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:20,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:20,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000601946] [2021-07-13 19:51:20,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000601946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:20,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688543920] [2021-07-13 19:51:20,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:20,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:51:20,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:20,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:20,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:20,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:20,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:20,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:20,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:20,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:20,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:20,332 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:20,357 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:51:20,357 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:20,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:51:20,358 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:51:20,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:20,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688543920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:20,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:20,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:51:20,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741702796] [2021-07-13 19:51:20,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:20,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:20,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:20,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:20,426 INFO L87 Difference]: Start difference. First operand 310 states and 804 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:21,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:21,530 INFO L93 Difference]: Finished difference Result 381 states and 919 transitions. [2021-07-13 19:51:21,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:51:21,530 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:21,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:21,531 INFO L225 Difference]: With dead ends: 381 [2021-07-13 19:51:21,531 INFO L226 Difference]: Without dead ends: 375 [2021-07-13 19:51:21,531 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1116.1ms TimeCoverageRelationStatistics Valid=232, Invalid=1408, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:51:21,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-07-13 19:51:21,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 303. [2021-07-13 19:51:21,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.6026490066225167) internal successors, (786), 302 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:21,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 786 transitions. [2021-07-13 19:51:21,534 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 786 transitions. Word has length 19 [2021-07-13 19:51:21,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:21,534 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 786 transitions. [2021-07-13 19:51:21,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:21,534 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 786 transitions. [2021-07-13 19:51:21,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:21,535 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:21,535 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:21,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15076,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:21,735 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:21,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:21,735 INFO L82 PathProgramCache]: Analyzing trace with hash -920005186, now seen corresponding path program 508 times [2021-07-13 19:51:21,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:21,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373733138] [2021-07-13 19:51:21,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:21,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:21,806 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:21,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:21,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373733138] [2021-07-13 19:51:21,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373733138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:21,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850591377] [2021-07-13 19:51:21,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:21,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:51:21,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:21,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:21,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:22,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:22,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:22,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:22,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:22,118 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:51:22,119 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:22,154 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:51:22,154 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:22,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:51:22,157 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:22,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:22,170 INFO L518 ElimStorePlain]: Eliminatee v_prenex_562 vanished before elimination [2021-07-13 19:51:22,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:51:22,171 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:51:22,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:22,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850591377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:22,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:22,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:51:22,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292867631] [2021-07-13 19:51:22,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:51:22,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:22,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:51:22,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:51:22,200 INFO L87 Difference]: Start difference. First operand 303 states and 786 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:22,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:22,438 INFO L93 Difference]: Finished difference Result 331 states and 831 transitions. [2021-07-13 19:51:22,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:51:22,438 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:22,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:22,439 INFO L225 Difference]: With dead ends: 331 [2021-07-13 19:51:22,439 INFO L226 Difference]: Without dead ends: 313 [2021-07-13 19:51:22,439 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 341.2ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:51:22,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-07-13 19:51:22,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 304. [2021-07-13 19:51:22,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.6006600660066006) internal successors, (788), 303 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:22,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 788 transitions. [2021-07-13 19:51:22,442 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 788 transitions. Word has length 19 [2021-07-13 19:51:22,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:22,442 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 788 transitions. [2021-07-13 19:51:22,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:22,442 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 788 transitions. [2021-07-13 19:51:22,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:22,442 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:22,442 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:22,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15087 [2021-07-13 19:51:22,643 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:22,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:22,643 INFO L82 PathProgramCache]: Analyzing trace with hash 610921021, now seen corresponding path program 509 times [2021-07-13 19:51:22,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:22,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604637070] [2021-07-13 19:51:22,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:22,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:22,714 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:22,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:22,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604637070] [2021-07-13 19:51:22,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604637070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:22,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497675259] [2021-07-13 19:51:22,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:22,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:51:22,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:22,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:22,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:22,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:22,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:22,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:22,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:22,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:22,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:22,905 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:22,926 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:51:22,927 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:22,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:22,927 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:51:22,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:22,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497675259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:22,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:22,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:51:22,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004896652] [2021-07-13 19:51:22,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:51:22,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:22,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:51:22,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:51:22,949 INFO L87 Difference]: Start difference. First operand 304 states and 788 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:23,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:23,184 INFO L93 Difference]: Finished difference Result 355 states and 889 transitions. [2021-07-13 19:51:23,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:51:23,185 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:23,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:23,185 INFO L225 Difference]: With dead ends: 355 [2021-07-13 19:51:23,185 INFO L226 Difference]: Without dead ends: 355 [2021-07-13 19:51:23,185 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 224.8ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:51:23,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-07-13 19:51:23,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 304. [2021-07-13 19:51:23,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.6006600660066006) internal successors, (788), 303 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:23,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 788 transitions. [2021-07-13 19:51:23,189 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 788 transitions. Word has length 19 [2021-07-13 19:51:23,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:23,189 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 788 transitions. [2021-07-13 19:51:23,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:23,189 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 788 transitions. [2021-07-13 19:51:23,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:23,189 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:23,189 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:23,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 513 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15104 [2021-07-13 19:51:23,390 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:23,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:23,390 INFO L82 PathProgramCache]: Analyzing trace with hash 216098818, now seen corresponding path program 510 times [2021-07-13 19:51:23,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:23,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640900901] [2021-07-13 19:51:23,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:23,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:23,460 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:23,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:23,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640900901] [2021-07-13 19:51:23,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640900901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:23,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729412530] [2021-07-13 19:51:23,461 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:23,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:51:23,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:23,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:23,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:23,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:23,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:23,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:23,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:23,757 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:51:23,758 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:23,793 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:51:23,793 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:23,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:51:23,796 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:23,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:23,809 INFO L518 ElimStorePlain]: Eliminatee v_prenex_566 vanished before elimination [2021-07-13 19:51:23,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:51:23,810 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:51:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:23,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729412530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:23,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:23,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:51:23,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140182062] [2021-07-13 19:51:23,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:51:23,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:23,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:51:23,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:51:23,838 INFO L87 Difference]: Start difference. First operand 304 states and 788 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:24,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:24,131 INFO L93 Difference]: Finished difference Result 329 states and 829 transitions. [2021-07-13 19:51:24,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:51:24,131 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:24,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:24,132 INFO L225 Difference]: With dead ends: 329 [2021-07-13 19:51:24,132 INFO L226 Difference]: Without dead ends: 317 [2021-07-13 19:51:24,132 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 363.4ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:51:24,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-07-13 19:51:24,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 304. [2021-07-13 19:51:24,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.6006600660066006) internal successors, (788), 303 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:24,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 788 transitions. [2021-07-13 19:51:24,135 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 788 transitions. Word has length 19 [2021-07-13 19:51:24,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:24,135 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 788 transitions. [2021-07-13 19:51:24,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:24,135 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 788 transitions. [2021-07-13 19:51:24,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:24,136 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:24,136 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:24,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15108,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:24,336 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:24,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:24,336 INFO L82 PathProgramCache]: Analyzing trace with hash 958220195, now seen corresponding path program 511 times [2021-07-13 19:51:24,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:24,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831237772] [2021-07-13 19:51:24,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:24,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:24,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:24,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:24,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831237772] [2021-07-13 19:51:24,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831237772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:24,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894634889] [2021-07-13 19:51:24,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:24,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:24,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:24,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:24,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:24,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:24,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:24,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:24,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:24,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:24,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:24,625 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:51:24,625 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:24,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:24,626 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:51:24,647 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:24,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894634889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:24,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:24,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:51:24,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705815854] [2021-07-13 19:51:24,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:51:24,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:24,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:51:24,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:51:24,648 INFO L87 Difference]: Start difference. First operand 304 states and 788 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:25,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:25,052 INFO L93 Difference]: Finished difference Result 409 states and 997 transitions. [2021-07-13 19:51:25,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:51:25,052 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:25,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:25,053 INFO L225 Difference]: With dead ends: 409 [2021-07-13 19:51:25,053 INFO L226 Difference]: Without dead ends: 409 [2021-07-13 19:51:25,053 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 403.3ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:51:25,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-07-13 19:51:25,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 305. [2021-07-13 19:51:25,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.598684210526316) internal successors, (790), 304 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:25,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 790 transitions. [2021-07-13 19:51:25,056 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 790 transitions. Word has length 19 [2021-07-13 19:51:25,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:25,056 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 790 transitions. [2021-07-13 19:51:25,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:25,057 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 790 transitions. [2021-07-13 19:51:25,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:25,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:25,057 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:25,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15125,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:25,257 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:25,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:25,258 INFO L82 PathProgramCache]: Analyzing trace with hash -24347330, now seen corresponding path program 512 times [2021-07-13 19:51:25,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:25,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000402395] [2021-07-13 19:51:25,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:25,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:25,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:25,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:25,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000402395] [2021-07-13 19:51:25,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000402395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:25,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338482611] [2021-07-13 19:51:25,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:25,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:51:25,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:25,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:25,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:25,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:51:25,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:25,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:25,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:25,544 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:25,584 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-07-13 19:51:25,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:51:25,587 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:25,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:25,601 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:25,601 INFO L518 ElimStorePlain]: Eliminatee v_prenex_570 vanished before elimination [2021-07-13 19:51:25,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:51:25,602 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:51:25,661 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:25,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338482611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:25,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:25,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:51:25,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408624247] [2021-07-13 19:51:25,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:51:25,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:25,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:51:25,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:51:25,662 INFO L87 Difference]: Start difference. First operand 305 states and 790 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:26,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:26,286 INFO L93 Difference]: Finished difference Result 370 states and 901 transitions. [2021-07-13 19:51:26,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:51:26,286 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:26,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:26,286 INFO L225 Difference]: With dead ends: 370 [2021-07-13 19:51:26,287 INFO L226 Difference]: Without dead ends: 364 [2021-07-13 19:51:26,287 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 579.8ms TimeCoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:51:26,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-07-13 19:51:26,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 307. [2021-07-13 19:51:26,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.604575163398693) internal successors, (797), 306 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:26,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 797 transitions. [2021-07-13 19:51:26,290 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 797 transitions. Word has length 19 [2021-07-13 19:51:26,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:26,290 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 797 transitions. [2021-07-13 19:51:26,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:26,290 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 797 transitions. [2021-07-13 19:51:26,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:26,290 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:26,290 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:26,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15129,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:26,491 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:26,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:26,491 INFO L82 PathProgramCache]: Analyzing trace with hash -277502595, now seen corresponding path program 513 times [2021-07-13 19:51:26,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:26,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892639485] [2021-07-13 19:51:26,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:26,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:26,558 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:26,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:26,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892639485] [2021-07-13 19:51:26,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892639485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:26,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779876889] [2021-07-13 19:51:26,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:26,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:51:26,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:26,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:26,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:26,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:26,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:26,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:26,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:26,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:26,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:26,734 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:26,759 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:51:26,759 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:26,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:51:26,760 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:51:26,804 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:26,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779876889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:26,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:26,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:51:26,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719697970] [2021-07-13 19:51:26,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:51:26,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:26,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:51:26,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:51:26,804 INFO L87 Difference]: Start difference. First operand 307 states and 797 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:27,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:27,372 INFO L93 Difference]: Finished difference Result 457 states and 1081 transitions. [2021-07-13 19:51:27,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:51:27,373 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:27,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:27,374 INFO L225 Difference]: With dead ends: 457 [2021-07-13 19:51:27,374 INFO L226 Difference]: Without dead ends: 457 [2021-07-13 19:51:27,374 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 565.0ms TimeCoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:51:27,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-07-13 19:51:27,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 307. [2021-07-13 19:51:27,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.604575163398693) internal successors, (797), 306 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:27,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 797 transitions. [2021-07-13 19:51:27,377 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 797 transitions. Word has length 19 [2021-07-13 19:51:27,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:27,378 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 797 transitions. [2021-07-13 19:51:27,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:27,378 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 797 transitions. [2021-07-13 19:51:27,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:27,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:27,378 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:27,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15148 [2021-07-13 19:51:27,579 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:27,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:27,579 INFO L82 PathProgramCache]: Analyzing trace with hash -724840318, now seen corresponding path program 514 times [2021-07-13 19:51:27,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:27,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330690735] [2021-07-13 19:51:27,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:27,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:27,647 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:27,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:27,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330690735] [2021-07-13 19:51:27,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330690735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:27,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487874975] [2021-07-13 19:51:27,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:27,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:51:27,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:27,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:27,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:27,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:51:27,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:27,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:27,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:27,859 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:27,900 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-07-13 19:51:27,900 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:27,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:51:27,903 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:27,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:27,918 INFO L518 ElimStorePlain]: Eliminatee v_prenex_573 vanished before elimination [2021-07-13 19:51:27,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:51:27,919 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:51:27,976 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:27,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487874975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:27,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:27,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:51:27,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50760663] [2021-07-13 19:51:27,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:51:27,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:27,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:51:27,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:51:27,977 INFO L87 Difference]: Start difference. First operand 307 states and 797 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:28,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:28,300 INFO L93 Difference]: Finished difference Result 340 states and 859 transitions. [2021-07-13 19:51:28,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:51:28,300 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:28,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:28,301 INFO L225 Difference]: With dead ends: 340 [2021-07-13 19:51:28,301 INFO L226 Difference]: Without dead ends: 340 [2021-07-13 19:51:28,301 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 343.4ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:51:28,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-07-13 19:51:28,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 306. [2021-07-13 19:51:28,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.6) internal successors, (793), 305 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:28,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 793 transitions. [2021-07-13 19:51:28,304 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 793 transitions. Word has length 19 [2021-07-13 19:51:28,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:28,304 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 793 transitions. [2021-07-13 19:51:28,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:28,304 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 793 transitions. [2021-07-13 19:51:28,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:28,305 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:28,305 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:28,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15156,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:28,505 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:28,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:28,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1587329733, now seen corresponding path program 515 times [2021-07-13 19:51:28,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:28,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643625450] [2021-07-13 19:51:28,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:28,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:28,573 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:28,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:28,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643625450] [2021-07-13 19:51:28,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643625450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:28,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894129610] [2021-07-13 19:51:28,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:28,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:51:28,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:28,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:28,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:28,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:28,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:28,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:28,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:28,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:28,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:28,747 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:28,772 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:51:28,772 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:28,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:51:28,773 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:51:28,842 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:28,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894129610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:28,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:28,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:51:28,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025639729] [2021-07-13 19:51:28,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:51:28,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:28,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:51:28,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:51:28,843 INFO L87 Difference]: Start difference. First operand 306 states and 793 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:29,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:29,577 INFO L93 Difference]: Finished difference Result 398 states and 971 transitions. [2021-07-13 19:51:29,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:51:29,577 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:29,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:29,578 INFO L225 Difference]: With dead ends: 398 [2021-07-13 19:51:29,578 INFO L226 Difference]: Without dead ends: 394 [2021-07-13 19:51:29,578 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 744.9ms TimeCoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:51:29,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-07-13 19:51:29,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 303. [2021-07-13 19:51:29,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.6026490066225167) internal successors, (786), 302 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:29,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 786 transitions. [2021-07-13 19:51:29,581 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 786 transitions. Word has length 19 [2021-07-13 19:51:29,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:29,581 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 786 transitions. [2021-07-13 19:51:29,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:29,581 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 786 transitions. [2021-07-13 19:51:29,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:29,582 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:29,582 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:29,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15173 [2021-07-13 19:51:29,782 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:29,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:29,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1916872104, now seen corresponding path program 516 times [2021-07-13 19:51:29,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:29,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992267668] [2021-07-13 19:51:29,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:29,846 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:29,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:29,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992267668] [2021-07-13 19:51:29,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992267668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:29,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756991847] [2021-07-13 19:51:29,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:29,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:51:29,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:29,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:29,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:30,110 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:51:30,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:30,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:30,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:30,114 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:30,150 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:51:30,150 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:30,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:51:30,153 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:30,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:30,166 INFO L518 ElimStorePlain]: Eliminatee v_prenex_578 vanished before elimination [2021-07-13 19:51:30,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:51:30,167 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:51:30,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:30,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756991847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:30,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:30,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:51:30,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844864399] [2021-07-13 19:51:30,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:51:30,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:30,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:51:30,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:51:30,193 INFO L87 Difference]: Start difference. First operand 303 states and 786 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:30,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:30,596 INFO L93 Difference]: Finished difference Result 379 states and 911 transitions. [2021-07-13 19:51:30,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:51:30,596 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:30,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:30,597 INFO L225 Difference]: With dead ends: 379 [2021-07-13 19:51:30,597 INFO L226 Difference]: Without dead ends: 367 [2021-07-13 19:51:30,597 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 356.3ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:51:30,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-07-13 19:51:30,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 294. [2021-07-13 19:51:30,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.590443686006826) internal successors, (759), 293 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:30,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 759 transitions. [2021-07-13 19:51:30,600 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 759 transitions. Word has length 19 [2021-07-13 19:51:30,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:30,600 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 759 transitions. [2021-07-13 19:51:30,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:30,600 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 759 transitions. [2021-07-13 19:51:30,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:30,600 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:30,600 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:30,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15184,520 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:30,801 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:30,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:30,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1174750727, now seen corresponding path program 517 times [2021-07-13 19:51:30,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:30,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555583668] [2021-07-13 19:51:30,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:30,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:30,870 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:30,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:30,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555583668] [2021-07-13 19:51:30,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555583668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:30,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356600258] [2021-07-13 19:51:30,871 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:30,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:30,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:31,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:31,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:31,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:31,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:31,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:31,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:31,039 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:31,060 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:51:31,060 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:31,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:31,061 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:51:31,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:31,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356600258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:31,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:31,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:51:31,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916160194] [2021-07-13 19:51:31,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:51:31,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:31,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:51:31,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:51:31,081 INFO L87 Difference]: Start difference. First operand 294 states and 759 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:31,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:31,334 INFO L93 Difference]: Finished difference Result 426 states and 1007 transitions. [2021-07-13 19:51:31,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:51:31,334 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:31,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:31,334 INFO L225 Difference]: With dead ends: 426 [2021-07-13 19:51:31,334 INFO L226 Difference]: Without dead ends: 426 [2021-07-13 19:51:31,335 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 195.1ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:31,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-07-13 19:51:31,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 305. [2021-07-13 19:51:31,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.6052631578947367) internal successors, (792), 304 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:31,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 792 transitions. [2021-07-13 19:51:31,338 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 792 transitions. Word has length 19 [2021-07-13 19:51:31,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:31,338 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 792 transitions. [2021-07-13 19:51:31,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:31,338 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 792 transitions. [2021-07-13 19:51:31,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:31,339 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:31,339 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:31,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15201,521 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:31,539 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:31,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:31,539 INFO L82 PathProgramCache]: Analyzing trace with hash 2137649044, now seen corresponding path program 518 times [2021-07-13 19:51:31,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:31,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180489541] [2021-07-13 19:51:31,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:31,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:31,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:31,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180489541] [2021-07-13 19:51:31,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180489541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:31,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640320934] [2021-07-13 19:51:31,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:31,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:51:31,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:31,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:31,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:31,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:51:31,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:31,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:31,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:31,792 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:31,832 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-07-13 19:51:31,832 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:31,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:51:31,835 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:31,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:31,849 INFO L518 ElimStorePlain]: Eliminatee v_prenex_579 vanished before elimination [2021-07-13 19:51:31,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:51:31,850 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:51:31,908 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:31,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640320934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:31,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:31,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:51:31,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44928942] [2021-07-13 19:51:31,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:51:31,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:31,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:51:31,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:51:31,909 INFO L87 Difference]: Start difference. First operand 305 states and 792 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:32,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:32,447 INFO L93 Difference]: Finished difference Result 416 states and 972 transitions. [2021-07-13 19:51:32,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:51:32,447 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:32,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:32,448 INFO L225 Difference]: With dead ends: 416 [2021-07-13 19:51:32,448 INFO L226 Difference]: Without dead ends: 410 [2021-07-13 19:51:32,448 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 452.6ms TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:51:32,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-07-13 19:51:32,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 307. [2021-07-13 19:51:32,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.611111111111111) internal successors, (799), 306 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:32,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 799 transitions. [2021-07-13 19:51:32,451 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 799 transitions. Word has length 19 [2021-07-13 19:51:32,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:32,451 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 799 transitions. [2021-07-13 19:51:32,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:32,451 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 799 transitions. [2021-07-13 19:51:32,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:32,452 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:32,452 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:32,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 522 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15205 [2021-07-13 19:51:32,652 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:32,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:32,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1884493779, now seen corresponding path program 519 times [2021-07-13 19:51:32,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:32,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200246257] [2021-07-13 19:51:32,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:32,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:32,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:32,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:32,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200246257] [2021-07-13 19:51:32,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200246257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:32,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674211661] [2021-07-13 19:51:32,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:32,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:51:32,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:32,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:32,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:32,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:32,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:32,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:32,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:32,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:32,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:32,865 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:32,891 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:51:32,891 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:32,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:51:32,892 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:51:32,935 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:32,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674211661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:32,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:32,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:51:32,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031441918] [2021-07-13 19:51:32,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:51:32,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:32,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:51:32,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:51:32,937 INFO L87 Difference]: Start difference. First operand 307 states and 799 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:33,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:33,200 INFO L93 Difference]: Finished difference Result 475 states and 1100 transitions. [2021-07-13 19:51:33,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:51:33,200 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:33,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:33,201 INFO L225 Difference]: With dead ends: 475 [2021-07-13 19:51:33,201 INFO L226 Difference]: Without dead ends: 475 [2021-07-13 19:51:33,201 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 235.2ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:51:33,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-07-13 19:51:33,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 307. [2021-07-13 19:51:33,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.611111111111111) internal successors, (799), 306 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:33,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 799 transitions. [2021-07-13 19:51:33,204 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 799 transitions. Word has length 19 [2021-07-13 19:51:33,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:33,204 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 799 transitions. [2021-07-13 19:51:33,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:33,204 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 799 transitions. [2021-07-13 19:51:33,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:33,205 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:33,205 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:33,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15224,523 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:33,406 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:33,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:33,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1437156056, now seen corresponding path program 520 times [2021-07-13 19:51:33,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:33,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228541374] [2021-07-13 19:51:33,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:33,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:33,492 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:33,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:33,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228541374] [2021-07-13 19:51:33,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228541374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:33,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390375544] [2021-07-13 19:51:33,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:33,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:51:33,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:33,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:33,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:33,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:33,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:33,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:33,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:33,701 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:51:33,701 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:33,737 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-07-13 19:51:33,737 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:33,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:51:33,740 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:33,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:51:33,754 INFO L518 ElimStorePlain]: Eliminatee v_prenex_583 vanished before elimination [2021-07-13 19:51:33,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:51:33,755 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:51:33,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:33,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390375544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:33,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:33,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:51:33,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886948648] [2021-07-13 19:51:33,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:51:33,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:33,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:51:33,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:51:33,806 INFO L87 Difference]: Start difference. First operand 307 states and 799 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:34,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:34,110 INFO L93 Difference]: Finished difference Result 386 states and 930 transitions. [2021-07-13 19:51:34,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:51:34,110 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:34,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:34,111 INFO L225 Difference]: With dead ends: 386 [2021-07-13 19:51:34,111 INFO L226 Difference]: Without dead ends: 386 [2021-07-13 19:51:34,111 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 258.4ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:34,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-07-13 19:51:34,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 306. [2021-07-13 19:51:34,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.6065573770491803) internal successors, (795), 305 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:34,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 795 transitions. [2021-07-13 19:51:34,114 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 795 transitions. Word has length 19 [2021-07-13 19:51:34,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:34,114 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 795 transitions. [2021-07-13 19:51:34,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:34,115 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 795 transitions. [2021-07-13 19:51:34,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:34,115 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:34,115 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:34,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15232,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:34,315 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:34,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:34,316 INFO L82 PathProgramCache]: Analyzing trace with hash -545641189, now seen corresponding path program 521 times [2021-07-13 19:51:34,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:34,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840597159] [2021-07-13 19:51:34,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:34,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:34,374 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:34,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:34,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840597159] [2021-07-13 19:51:34,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840597159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:34,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674116216] [2021-07-13 19:51:34,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:34,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:51:34,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:34,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:34,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:34,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:34,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:34,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:34,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:34,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:34,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:34,530 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:34,555 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:51:34,555 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:34,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:51:34,556 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:51:34,619 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:34,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674116216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:34,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:34,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:51:34,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911581210] [2021-07-13 19:51:34,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:51:34,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:34,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:51:34,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:51:34,620 INFO L87 Difference]: Start difference. First operand 306 states and 795 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:35,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:35,058 INFO L93 Difference]: Finished difference Result 475 states and 1084 transitions. [2021-07-13 19:51:35,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:51:35,059 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:35,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:35,059 INFO L225 Difference]: With dead ends: 475 [2021-07-13 19:51:35,059 INFO L226 Difference]: Without dead ends: 471 [2021-07-13 19:51:35,060 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 405.3ms TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:51:35,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-07-13 19:51:35,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 304. [2021-07-13 19:51:35,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.607260726072607) internal successors, (790), 303 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:35,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 790 transitions. [2021-07-13 19:51:35,063 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 790 transitions. Word has length 19 [2021-07-13 19:51:35,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:35,063 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 790 transitions. [2021-07-13 19:51:35,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:35,063 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 790 transitions. [2021-07-13 19:51:35,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:35,064 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:35,064 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:35,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 525 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15249 [2021-07-13 19:51:35,264 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:35,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:35,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1569572930, now seen corresponding path program 522 times [2021-07-13 19:51:35,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:35,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724419517] [2021-07-13 19:51:35,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:35,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:35,322 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:35,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:35,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724419517] [2021-07-13 19:51:35,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724419517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:35,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072231248] [2021-07-13 19:51:35,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:35,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:51:35,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:35,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:35,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:35,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:51:35,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:35,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:51:35,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:35,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:35,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:35,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:35,465 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:35,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:35,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:35,468 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:35,502 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-07-13 19:51:35,502 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:35,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:51:35,503 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:51:35,552 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:35,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072231248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:35,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:35,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:51:35,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34740618] [2021-07-13 19:51:35,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:51:35,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:35,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:51:35,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:51:35,553 INFO L87 Difference]: Start difference. First operand 304 states and 790 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:37,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:37,244 INFO L93 Difference]: Finished difference Result 692 states and 1463 transitions. [2021-07-13 19:51:37,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 19:51:37,244 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:37,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:37,245 INFO L225 Difference]: With dead ends: 692 [2021-07-13 19:51:37,245 INFO L226 Difference]: Without dead ends: 686 [2021-07-13 19:51:37,245 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 1549.0ms TimeCoverageRelationStatistics Valid=553, Invalid=4277, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 19:51:37,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-07-13 19:51:37,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 322. [2021-07-13 19:51:37,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.6697819314641746) internal successors, (857), 321 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:37,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 857 transitions. [2021-07-13 19:51:37,250 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 857 transitions. Word has length 19 [2021-07-13 19:51:37,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:37,250 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 857 transitions. [2021-07-13 19:51:37,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:37,250 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 857 transitions. [2021-07-13 19:51:37,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:37,250 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:37,250 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:37,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15260 [2021-07-13 19:51:37,451 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:37,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:37,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1822728195, now seen corresponding path program 523 times [2021-07-13 19:51:37,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:37,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465772374] [2021-07-13 19:51:37,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:37,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:37,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:37,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:37,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465772374] [2021-07-13 19:51:37,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465772374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:37,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545834266] [2021-07-13 19:51:37,518 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:37,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:37,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:37,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:37,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:37,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:37,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:37,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:37,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:37,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:37,687 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:37,716 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:51:37,716 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:37,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:51:37,717 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:51:37,759 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:37,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545834266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:37,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:37,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:51:37,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295485204] [2021-07-13 19:51:37,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:51:37,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:37,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:51:37,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:51:37,760 INFO L87 Difference]: Start difference. First operand 322 states and 857 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:38,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:38,099 INFO L93 Difference]: Finished difference Result 451 states and 1069 transitions. [2021-07-13 19:51:38,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:51:38,099 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:38,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:38,100 INFO L225 Difference]: With dead ends: 451 [2021-07-13 19:51:38,100 INFO L226 Difference]: Without dead ends: 445 [2021-07-13 19:51:38,100 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 335.8ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:51:38,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-07-13 19:51:38,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 322. [2021-07-13 19:51:38,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.6697819314641746) internal successors, (857), 321 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:38,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 857 transitions. [2021-07-13 19:51:38,104 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 857 transitions. Word has length 19 [2021-07-13 19:51:38,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:38,104 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 857 transitions. [2021-07-13 19:51:38,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:38,104 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 857 transitions. [2021-07-13 19:51:38,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:38,105 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:38,105 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:38,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15271,527 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:38,305 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:38,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:38,305 INFO L82 PathProgramCache]: Analyzing trace with hash 2024901378, now seen corresponding path program 524 times [2021-07-13 19:51:38,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:38,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943726357] [2021-07-13 19:51:38,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:38,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:38,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:38,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:38,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943726357] [2021-07-13 19:51:38,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943726357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:38,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635931943] [2021-07-13 19:51:38,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:38,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:51:38,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:38,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:38,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:38,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:38,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:38,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:38,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:38,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:38,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:38,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:38,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:38,510 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:51:38,511 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:38,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:51:38,513 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:38,546 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-07-13 19:51:38,546 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:38,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:51:38,547 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:51:38,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:38,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635931943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:38,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:38,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:51:38,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019229096] [2021-07-13 19:51:38,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:51:38,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:38,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:51:38,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:51:38,588 INFO L87 Difference]: Start difference. First operand 322 states and 857 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:39,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:39,351 INFO L93 Difference]: Finished difference Result 566 states and 1274 transitions. [2021-07-13 19:51:39,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:51:39,352 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:39,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:39,352 INFO L225 Difference]: With dead ends: 566 [2021-07-13 19:51:39,352 INFO L226 Difference]: Without dead ends: 566 [2021-07-13 19:51:39,352 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 667.5ms TimeCoverageRelationStatistics Valid=213, Invalid=1347, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:51:39,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-07-13 19:51:39,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 316. [2021-07-13 19:51:39,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.6444444444444444) internal successors, (833), 315 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:39,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 833 transitions. [2021-07-13 19:51:39,356 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 833 transitions. Word has length 19 [2021-07-13 19:51:39,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:39,356 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 833 transitions. [2021-07-13 19:51:39,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:39,357 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 833 transitions. [2021-07-13 19:51:39,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:39,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:39,357 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:39,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15287,528 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:39,558 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:39,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:39,558 INFO L82 PathProgramCache]: Analyzing trace with hash 42104133, now seen corresponding path program 525 times [2021-07-13 19:51:39,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:39,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736806284] [2021-07-13 19:51:39,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:39,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:39,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:39,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:39,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736806284] [2021-07-13 19:51:39,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736806284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:39,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403551018] [2021-07-13 19:51:39,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:39,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:51:39,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:39,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:39,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:39,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:39,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:39,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:39,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:39,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:39,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:39,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:39,868 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:51:39,869 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:39,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:51:39,869 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:51:39,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:39,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403551018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:39,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:39,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:51:39,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839634150] [2021-07-13 19:51:39,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:51:39,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:39,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:51:39,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:51:39,933 INFO L87 Difference]: Start difference. First operand 316 states and 833 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:40,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:40,546 INFO L93 Difference]: Finished difference Result 473 states and 1085 transitions. [2021-07-13 19:51:40,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:51:40,546 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:40,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:40,547 INFO L225 Difference]: With dead ends: 473 [2021-07-13 19:51:40,547 INFO L226 Difference]: Without dead ends: 469 [2021-07-13 19:51:40,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 609.1ms TimeCoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:51:40,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-07-13 19:51:40,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 315. [2021-07-13 19:51:40,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.643312101910828) internal successors, (830), 314 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:40,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 830 transitions. [2021-07-13 19:51:40,551 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 830 transitions. Word has length 19 [2021-07-13 19:51:40,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:40,551 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 830 transitions. [2021-07-13 19:51:40,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:40,551 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 830 transitions. [2021-07-13 19:51:40,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:40,551 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:40,552 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:40,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15297,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:40,752 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:40,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:40,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1489671576, now seen corresponding path program 526 times [2021-07-13 19:51:40,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:40,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045468308] [2021-07-13 19:51:40,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:40,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:40,813 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:40,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:40,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045468308] [2021-07-13 19:51:40,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045468308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:40,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000967149] [2021-07-13 19:51:40,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:40,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:51:40,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:40,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:40,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:40,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:40,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:40,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:40,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:40,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:40,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:40,962 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:40,982 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-07-13 19:51:40,982 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:40,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:40,983 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-07-13 19:51:41,004 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:41,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000967149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:41,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:41,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:51:41,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901538282] [2021-07-13 19:51:41,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:51:41,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:41,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:51:41,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:51:41,004 INFO L87 Difference]: Start difference. First operand 315 states and 830 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:41,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:41,421 INFO L93 Difference]: Finished difference Result 476 states and 1112 transitions. [2021-07-13 19:51:41,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:51:41,421 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:41,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:41,422 INFO L225 Difference]: With dead ends: 476 [2021-07-13 19:51:41,422 INFO L226 Difference]: Without dead ends: 476 [2021-07-13 19:51:41,422 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 388.0ms TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:51:41,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-07-13 19:51:41,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 312. [2021-07-13 19:51:41,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.620578778135048) internal successors, (815), 311 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:41,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 815 transitions. [2021-07-13 19:51:41,426 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 815 transitions. Word has length 19 [2021-07-13 19:51:41,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:41,426 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 815 transitions. [2021-07-13 19:51:41,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:41,426 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 815 transitions. [2021-07-13 19:51:41,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:41,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:41,427 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:41,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15316,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:41,627 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:41,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:41,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1117815289, now seen corresponding path program 527 times [2021-07-13 19:51:41,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:41,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106350137] [2021-07-13 19:51:41,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:41,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:41,687 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:41,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:41,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106350137] [2021-07-13 19:51:41,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106350137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:41,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753932458] [2021-07-13 19:51:41,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:41,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:51:41,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:41,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:41,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:41,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:41,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:41,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:41,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:41,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:51:41,870 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:41,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:51:41,873 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:41,908 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-07-13 19:51:41,908 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:41,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:51:41,909 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-07-13 19:51:41,935 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:41,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753932458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:41,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:41,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:51:41,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144412271] [2021-07-13 19:51:41,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:51:41,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:41,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:51:41,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:51:41,936 INFO L87 Difference]: Start difference. First operand 312 states and 815 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:42,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:42,354 INFO L93 Difference]: Finished difference Result 381 states and 925 transitions. [2021-07-13 19:51:42,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:51:42,354 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:42,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:42,355 INFO L225 Difference]: With dead ends: 381 [2021-07-13 19:51:42,355 INFO L226 Difference]: Without dead ends: 373 [2021-07-13 19:51:42,355 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 418.2ms TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:51:42,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-07-13 19:51:42,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 311. [2021-07-13 19:51:42,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.6193548387096772) internal successors, (812), 310 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:42,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 812 transitions. [2021-07-13 19:51:42,358 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 812 transitions. Word has length 19 [2021-07-13 19:51:42,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:42,358 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 812 transitions. [2021-07-13 19:51:42,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:42,358 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 812 transitions. [2021-07-13 19:51:42,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:42,359 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:42,359 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:42,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15320,531 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:42,559 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:42,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:42,560 INFO L82 PathProgramCache]: Analyzing trace with hash -529337132, now seen corresponding path program 528 times [2021-07-13 19:51:42,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:42,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884864167] [2021-07-13 19:51:42,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:42,627 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:42,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:42,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884864167] [2021-07-13 19:51:42,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884864167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:42,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704334250] [2021-07-13 19:51:42,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:42,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:51:42,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:42,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:42,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:42,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:42,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:42,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:42,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:42,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:51:42,782 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:42,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:51:42,785 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:42,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:42,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:42,788 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:42,822 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-07-13 19:51:42,822 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:42,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:51:42,823 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:51:42,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:42,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704334250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:42,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:42,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:51:42,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162480120] [2021-07-13 19:51:42,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:51:42,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:42,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:51:42,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:51:42,874 INFO L87 Difference]: Start difference. First operand 311 states and 812 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:45,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:45,075 INFO L93 Difference]: Finished difference Result 627 states and 1370 transitions. [2021-07-13 19:51:45,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 19:51:45,075 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:45,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:45,076 INFO L225 Difference]: With dead ends: 627 [2021-07-13 19:51:45,076 INFO L226 Difference]: Without dead ends: 621 [2021-07-13 19:51:45,076 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1312 ImplicationChecksByTransitivity, 2065.9ms TimeCoverageRelationStatistics Valid=634, Invalid=3656, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 19:51:45,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-07-13 19:51:45,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 324. [2021-07-13 19:51:45,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.653250773993808) internal successors, (857), 323 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:45,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 857 transitions. [2021-07-13 19:51:45,084 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 857 transitions. Word has length 19 [2021-07-13 19:51:45,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:45,084 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 857 transitions. [2021-07-13 19:51:45,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:45,084 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 857 transitions. [2021-07-13 19:51:45,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:45,085 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:45,085 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:45,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15333,532 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:45,285 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:45,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:45,285 INFO L82 PathProgramCache]: Analyzing trace with hash -782492397, now seen corresponding path program 529 times [2021-07-13 19:51:45,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:45,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144494824] [2021-07-13 19:51:45,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:45,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:45,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:45,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144494824] [2021-07-13 19:51:45,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144494824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:45,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351069376] [2021-07-13 19:51:45,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:45,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:45,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:45,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:45,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:45,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:45,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:45,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:45,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:45,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:45,535 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:45,563 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:51:45,563 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:45,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:51:45,564 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:51:45,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:45,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351069376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:45,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:45,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:51:45,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452620821] [2021-07-13 19:51:45,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:51:45,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:45,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:51:45,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:51:45,609 INFO L87 Difference]: Start difference. First operand 324 states and 857 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:46,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:46,059 INFO L93 Difference]: Finished difference Result 431 states and 1027 transitions. [2021-07-13 19:51:46,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:51:46,060 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:46,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:46,060 INFO L225 Difference]: With dead ends: 431 [2021-07-13 19:51:46,060 INFO L226 Difference]: Without dead ends: 425 [2021-07-13 19:51:46,060 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 476.8ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:51:46,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-07-13 19:51:46,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 323. [2021-07-13 19:51:46,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.6490683229813663) internal successors, (853), 322 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:46,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 853 transitions. [2021-07-13 19:51:46,064 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 853 transitions. Word has length 19 [2021-07-13 19:51:46,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:46,064 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 853 transitions. [2021-07-13 19:51:46,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:46,064 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 853 transitions. [2021-07-13 19:51:46,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:46,064 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:46,064 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:46,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15344,533 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:46,265 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:46,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:46,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1229830120, now seen corresponding path program 530 times [2021-07-13 19:51:46,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:46,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947345311] [2021-07-13 19:51:46,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:46,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:46,334 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:46,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:46,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947345311] [2021-07-13 19:51:46,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947345311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:46,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425986708] [2021-07-13 19:51:46,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:46,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:51:46,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:46,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:46,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:46,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:46,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:46,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:46,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:46,482 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:51:46,482 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:46,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:51:46,485 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:46,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:46,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:46,488 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:46,520 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-07-13 19:51:46,520 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:46,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:51:46,521 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:51:46,563 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:46,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425986708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:46,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:46,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:51:46,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687997336] [2021-07-13 19:51:46,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:51:46,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:46,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:51:46,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:51:46,564 INFO L87 Difference]: Start difference. First operand 323 states and 853 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:47,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:47,715 INFO L93 Difference]: Finished difference Result 553 states and 1248 transitions. [2021-07-13 19:51:47,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:51:47,715 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:47,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:47,716 INFO L225 Difference]: With dead ends: 553 [2021-07-13 19:51:47,716 INFO L226 Difference]: Without dead ends: 549 [2021-07-13 19:51:47,716 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1063.2ms TimeCoverageRelationStatistics Valid=325, Invalid=1655, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:51:47,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-07-13 19:51:47,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 312. [2021-07-13 19:51:47,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.620578778135048) internal successors, (815), 311 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:47,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 815 transitions. [2021-07-13 19:51:47,720 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 815 transitions. Word has length 19 [2021-07-13 19:51:47,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:47,720 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 815 transitions. [2021-07-13 19:51:47,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:47,720 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 815 transitions. [2021-07-13 19:51:47,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:47,720 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:47,720 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:47,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15360,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:47,921 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:47,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:47,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1082339931, now seen corresponding path program 531 times [2021-07-13 19:51:47,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:47,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396108114] [2021-07-13 19:51:47,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:47,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:47,988 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:47,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:47,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396108114] [2021-07-13 19:51:47,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396108114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:47,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729407410] [2021-07-13 19:51:47,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:48,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:51:48,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:48,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:48,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:48,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:48,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:48,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:48,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:48,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:48,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:48,171 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:48,200 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:51:48,200 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:48,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:51:48,201 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:51:48,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:48,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729407410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:48,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:48,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:51:48,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383822332] [2021-07-13 19:51:48,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:51:48,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:48,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:51:48,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:51:48,268 INFO L87 Difference]: Start difference. First operand 312 states and 815 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:48,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:48,916 INFO L93 Difference]: Finished difference Result 397 states and 952 transitions. [2021-07-13 19:51:48,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:51:48,917 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:48,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:48,917 INFO L225 Difference]: With dead ends: 397 [2021-07-13 19:51:48,917 INFO L226 Difference]: Without dead ends: 393 [2021-07-13 19:51:48,917 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 670.7ms TimeCoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:51:48,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-07-13 19:51:48,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 311. [2021-07-13 19:51:48,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.6193548387096772) internal successors, (812), 310 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:48,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 812 transitions. [2021-07-13 19:51:48,921 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 812 transitions. Word has length 19 [2021-07-13 19:51:48,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:48,921 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 812 transitions. [2021-07-13 19:51:48,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:48,921 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 812 transitions. [2021-07-13 19:51:48,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:48,921 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:48,921 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:49,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15369 [2021-07-13 19:51:49,122 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:49,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:49,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1765059922, now seen corresponding path program 532 times [2021-07-13 19:51:49,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:49,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842851914] [2021-07-13 19:51:49,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:49,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:49,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:49,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842851914] [2021-07-13 19:51:49,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842851914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:49,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007832819] [2021-07-13 19:51:49,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:49,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:51:49,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:49,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:49,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:49,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:49,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:49,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:49,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:49,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:49,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:49,347 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:49,367 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-07-13 19:51:49,368 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:49,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:49,368 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-07-13 19:51:49,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:49,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007832819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:49,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:49,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:51:49,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819838697] [2021-07-13 19:51:49,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:51:49,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:49,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:51:49,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:51:49,391 INFO L87 Difference]: Start difference. First operand 311 states and 812 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:50,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:50,369 INFO L93 Difference]: Finished difference Result 437 states and 1047 transitions. [2021-07-13 19:51:50,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:51:50,369 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:50,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:50,369 INFO L225 Difference]: With dead ends: 437 [2021-07-13 19:51:50,370 INFO L226 Difference]: Without dead ends: 437 [2021-07-13 19:51:50,370 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 939.4ms TimeCoverageRelationStatistics Valid=287, Invalid=1435, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:51:50,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-07-13 19:51:50,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 305. [2021-07-13 19:51:50,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.601973684210526) internal successors, (791), 304 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:50,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 791 transitions. [2021-07-13 19:51:50,373 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 791 transitions. Word has length 19 [2021-07-13 19:51:50,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:50,373 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 791 transitions. [2021-07-13 19:51:50,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:50,373 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 791 transitions. [2021-07-13 19:51:50,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:50,374 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:50,374 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:50,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15388,536 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:50,574 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:50,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:50,574 INFO L82 PathProgramCache]: Analyzing trace with hash -2136916209, now seen corresponding path program 533 times [2021-07-13 19:51:50,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:50,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140670406] [2021-07-13 19:51:50,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:50,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:50,644 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:50,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:50,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140670406] [2021-07-13 19:51:50,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140670406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:50,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595219356] [2021-07-13 19:51:50,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:50,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:51:50,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:50,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:50,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:50,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:51:50,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:50,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:51:50,893 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:50,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:50,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:50,896 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:50,930 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-07-13 19:51:50,930 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:50,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:51:50,931 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-07-13 19:51:50,958 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:50,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595219356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:50,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:50,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:51:50,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935067277] [2021-07-13 19:51:50,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:51:50,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:50,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:51:50,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:51:50,959 INFO L87 Difference]: Start difference. First operand 305 states and 791 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:51,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:51,386 INFO L93 Difference]: Finished difference Result 331 states and 831 transitions. [2021-07-13 19:51:51,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:51:51,386 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:51,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:51,387 INFO L225 Difference]: With dead ends: 331 [2021-07-13 19:51:51,387 INFO L226 Difference]: Without dead ends: 323 [2021-07-13 19:51:51,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 465.9ms TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:51:51,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-07-13 19:51:51,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 304. [2021-07-13 19:51:51,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.6006600660066006) internal successors, (788), 303 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:51,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 788 transitions. [2021-07-13 19:51:51,390 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 788 transitions. Word has length 19 [2021-07-13 19:51:51,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:51,390 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 788 transitions. [2021-07-13 19:51:51,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:51,390 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 788 transitions. [2021-07-13 19:51:51,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:51,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:51,390 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:51,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15392,537 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:51,591 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:51,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:51,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1177314600, now seen corresponding path program 534 times [2021-07-13 19:51:51,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:51,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655307353] [2021-07-13 19:51:51,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:51,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:51,663 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:51,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:51,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655307353] [2021-07-13 19:51:51,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655307353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:51,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971999692] [2021-07-13 19:51:51,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:51,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:51:51,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:51,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:51,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:51,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:51,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:51,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:51,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:51,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:51,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:51,818 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:51,839 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-07-13 19:51:51,839 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:51,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:51,840 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-07-13 19:51:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:51,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971999692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:51,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:51,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:51:51,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586726552] [2021-07-13 19:51:51,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:51:51,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:51,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:51:51,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:51:51,863 INFO L87 Difference]: Start difference. First operand 304 states and 788 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:52,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:52,162 INFO L93 Difference]: Finished difference Result 376 states and 920 transitions. [2021-07-13 19:51:52,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:51:52,162 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:52,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:52,162 INFO L225 Difference]: With dead ends: 376 [2021-07-13 19:51:52,162 INFO L226 Difference]: Without dead ends: 376 [2021-07-13 19:51:52,163 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 295.1ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:51:52,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-07-13 19:51:52,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 298. [2021-07-13 19:51:52,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.585858585858586) internal successors, (768), 297 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:52,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 768 transitions. [2021-07-13 19:51:52,166 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 768 transitions. Word has length 19 [2021-07-13 19:51:52,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:52,166 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 768 transitions. [2021-07-13 19:51:52,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:52,166 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 768 transitions. [2021-07-13 19:51:52,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:52,166 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:52,166 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:52,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15405 [2021-07-13 19:51:52,367 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:52,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:52,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1145358555, now seen corresponding path program 535 times [2021-07-13 19:51:52,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:52,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637683605] [2021-07-13 19:51:52,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:52,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:52,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:52,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:52,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637683605] [2021-07-13 19:51:52,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637683605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:52,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806267578] [2021-07-13 19:51:52,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:52,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:52,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:52,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:51:52,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:52,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:52,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:52,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:52,626 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:52,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:51:52,629 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:52,664 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-07-13 19:51:52,664 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:52,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:51:52,665 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-07-13 19:51:52,692 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:52,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806267578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:52,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:52,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:51:52,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905333427] [2021-07-13 19:51:52,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:51:52,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:52,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:51:52,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:51:52,693 INFO L87 Difference]: Start difference. First operand 298 states and 768 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:53,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:53,008 INFO L93 Difference]: Finished difference Result 317 states and 796 transitions. [2021-07-13 19:51:53,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:51:53,008 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:53,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:53,009 INFO L225 Difference]: With dead ends: 317 [2021-07-13 19:51:53,009 INFO L226 Difference]: Without dead ends: 305 [2021-07-13 19:51:53,009 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 391.4ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:51:53,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-07-13 19:51:53,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 297. [2021-07-13 19:51:53,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.5844594594594597) internal successors, (765), 296 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:53,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 765 transitions. [2021-07-13 19:51:53,012 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 765 transitions. Word has length 19 [2021-07-13 19:51:53,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:53,012 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 765 transitions. [2021-07-13 19:51:53,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:53,012 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 765 transitions. [2021-07-13 19:51:53,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:53,012 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:53,012 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:53,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15409,539 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:53,213 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:53,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:53,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1653201534, now seen corresponding path program 536 times [2021-07-13 19:51:53,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:53,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85556063] [2021-07-13 19:51:53,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:53,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:53,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:53,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:53,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85556063] [2021-07-13 19:51:53,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85556063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:53,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123804521] [2021-07-13 19:51:53,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:53,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:51:53,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:53,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:53,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:53,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:53,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:53,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:53,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:53,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:51:53,452 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:53,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:53,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:53,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:53,455 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:53,457 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:51:53,458 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:53,490 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-07-13 19:51:53,490 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:53,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:51:53,491 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:51:53,543 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:53,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123804521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:53,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:53,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:51:53,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408941721] [2021-07-13 19:51:53,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:53,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:53,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:53,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:53,544 INFO L87 Difference]: Start difference. First operand 297 states and 765 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:54,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:54,499 INFO L93 Difference]: Finished difference Result 376 states and 903 transitions. [2021-07-13 19:51:54,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:51:54,499 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:54,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:54,500 INFO L225 Difference]: With dead ends: 376 [2021-07-13 19:51:54,500 INFO L226 Difference]: Without dead ends: 370 [2021-07-13 19:51:54,500 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 902.4ms TimeCoverageRelationStatistics Valid=208, Invalid=1352, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:51:54,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-07-13 19:51:54,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 305. [2021-07-13 19:51:54,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.598684210526316) internal successors, (790), 304 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:54,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 790 transitions. [2021-07-13 19:51:54,503 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 790 transitions. Word has length 19 [2021-07-13 19:51:54,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:54,503 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 790 transitions. [2021-07-13 19:51:54,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:54,503 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 790 transitions. [2021-07-13 19:51:54,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:54,504 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:54,504 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:54,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15422,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:54,704 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:54,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:54,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1400046269, now seen corresponding path program 537 times [2021-07-13 19:51:54,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:54,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671927634] [2021-07-13 19:51:54,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:54,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:54,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:54,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:54,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671927634] [2021-07-13 19:51:54,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671927634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:54,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572616362] [2021-07-13 19:51:54,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:54,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:51:54,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:54,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:54,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:54,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:54,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:54,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:54,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:54,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:54,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:54,989 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:55,018 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:51:55,019 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:55,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:51:55,019 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:51:55,065 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:55,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572616362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:55,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:55,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:51:55,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96652409] [2021-07-13 19:51:55,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:55,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:55,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:55,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:55,066 INFO L87 Difference]: Start difference. First operand 305 states and 790 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:55,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:55,484 INFO L93 Difference]: Finished difference Result 389 states and 930 transitions. [2021-07-13 19:51:55,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:51:55,484 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:55,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:55,485 INFO L225 Difference]: With dead ends: 389 [2021-07-13 19:51:55,485 INFO L226 Difference]: Without dead ends: 389 [2021-07-13 19:51:55,485 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 436.5ms TimeCoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:51:55,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-07-13 19:51:55,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 305. [2021-07-13 19:51:55,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.598684210526316) internal successors, (790), 304 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:55,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 790 transitions. [2021-07-13 19:51:55,491 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 790 transitions. Word has length 19 [2021-07-13 19:51:55,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:55,491 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 790 transitions. [2021-07-13 19:51:55,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:55,491 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 790 transitions. [2021-07-13 19:51:55,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:55,492 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:55,492 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:55,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15433,541 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:55,692 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:55,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:55,693 INFO L82 PathProgramCache]: Analyzing trace with hash 952708546, now seen corresponding path program 538 times [2021-07-13 19:51:55,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:55,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468514869] [2021-07-13 19:51:55,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:55,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:55,773 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:55,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:55,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468514869] [2021-07-13 19:51:55,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468514869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:55,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556073320] [2021-07-13 19:51:55,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:55,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:51:55,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:55,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:55,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:55,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:51:55,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:55,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:55,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:55,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:55,932 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:55,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:51:55,935 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:55,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:55,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:55,938 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:55,972 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-07-13 19:51:55,972 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:55,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:51:55,973 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:51:56,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:56,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556073320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:56,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:56,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:51:56,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030327650] [2021-07-13 19:51:56,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:56,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:56,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:56,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:56,019 INFO L87 Difference]: Start difference. First operand 305 states and 790 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:56,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:56,812 INFO L93 Difference]: Finished difference Result 389 states and 935 transitions. [2021-07-13 19:51:56,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:51:56,812 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:56,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:56,813 INFO L225 Difference]: With dead ends: 389 [2021-07-13 19:51:56,813 INFO L226 Difference]: Without dead ends: 389 [2021-07-13 19:51:56,813 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 762.2ms TimeCoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:51:56,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-07-13 19:51:56,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 305. [2021-07-13 19:51:56,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.598684210526316) internal successors, (790), 304 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:56,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 790 transitions. [2021-07-13 19:51:56,816 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 790 transitions. Word has length 19 [2021-07-13 19:51:56,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:56,816 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 790 transitions. [2021-07-13 19:51:56,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:56,816 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 790 transitions. [2021-07-13 19:51:56,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:56,817 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:56,817 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:57,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15449,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:57,017 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:57,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:57,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1030088699, now seen corresponding path program 539 times [2021-07-13 19:51:57,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:57,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003487328] [2021-07-13 19:51:57,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:57,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:57,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:57,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:57,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003487328] [2021-07-13 19:51:57,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003487328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:57,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835937313] [2021-07-13 19:51:57,099 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:57,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:51:57,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:57,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:57,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:57,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:57,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:57,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:57,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:57,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:57,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:57,290 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:57,317 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:51:57,318 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:57,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:51:57,318 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:51:57,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:57,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835937313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:57,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:57,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:51:57,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125205022] [2021-07-13 19:51:57,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:57,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:57,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:57,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:57,386 INFO L87 Difference]: Start difference. First operand 305 states and 790 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:57,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:57,957 INFO L93 Difference]: Finished difference Result 393 states and 932 transitions. [2021-07-13 19:51:57,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:51:57,957 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:57,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:57,958 INFO L225 Difference]: With dead ends: 393 [2021-07-13 19:51:57,958 INFO L226 Difference]: Without dead ends: 389 [2021-07-13 19:51:57,958 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 597.7ms TimeCoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:51:57,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-07-13 19:51:57,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 304. [2021-07-13 19:51:57,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.597359735973597) internal successors, (787), 303 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:57,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 787 transitions. [2021-07-13 19:51:57,961 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 787 transitions. Word has length 19 [2021-07-13 19:51:57,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:57,961 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 787 transitions. [2021-07-13 19:51:57,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:57,961 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 787 transitions. [2021-07-13 19:51:57,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:57,962 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:57,962 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:58,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15458 [2021-07-13 19:51:58,162 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:58,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:58,162 INFO L82 PathProgramCache]: Analyzing trace with hash 417478744, now seen corresponding path program 540 times [2021-07-13 19:51:58,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:58,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532293310] [2021-07-13 19:51:58,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:58,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:58,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:58,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:58,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532293310] [2021-07-13 19:51:58,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532293310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:58,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236869504] [2021-07-13 19:51:58,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:58,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:51:58,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:58,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:58,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:58,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:58,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:58,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:51:58,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:58,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:58,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:58,420 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:58,441 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-07-13 19:51:58,442 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:58,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:51:58,442 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-07-13 19:51:58,465 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:58,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236869504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:58,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:58,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:51:58,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666458689] [2021-07-13 19:51:58,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:58,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:58,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:58,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:58,466 INFO L87 Difference]: Start difference. First operand 304 states and 787 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:59,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:59,281 INFO L93 Difference]: Finished difference Result 379 states and 929 transitions. [2021-07-13 19:51:59,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:51:59,282 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:51:59,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:59,282 INFO L225 Difference]: With dead ends: 379 [2021-07-13 19:51:59,282 INFO L226 Difference]: Without dead ends: 379 [2021-07-13 19:51:59,282 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 811.5ms TimeCoverageRelationStatistics Valid=205, Invalid=1201, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:51:59,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-07-13 19:51:59,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 304. [2021-07-13 19:51:59,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.597359735973597) internal successors, (787), 303 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:59,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 787 transitions. [2021-07-13 19:51:59,286 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 787 transitions. Word has length 19 [2021-07-13 19:51:59,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:59,286 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 787 transitions. [2021-07-13 19:51:59,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:59,286 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 787 transitions. [2021-07-13 19:51:59,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:51:59,286 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:59,286 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:59,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15471,544 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:59,487 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:59,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:59,487 INFO L82 PathProgramCache]: Analyzing trace with hash 45622457, now seen corresponding path program 541 times [2021-07-13 19:51:59,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:59,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921068415] [2021-07-13 19:51:59,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:59,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:59,572 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:59,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:59,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921068415] [2021-07-13 19:51:59,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921068415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:59,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677320985] [2021-07-13 19:51:59,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:59,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:59,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:51:59,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:59,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:51:59,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:59,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:51:59,782 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:59,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:51:59,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:51:59,785 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:51:59,820 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-07-13 19:51:59,820 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:51:59,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:51:59,821 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-07-13 19:51:59,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:59,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677320985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:59,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:59,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:51:59,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481760630] [2021-07-13 19:51:59,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:51:59,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:59,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:51:59,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:51:59,854 INFO L87 Difference]: Start difference. First operand 304 states and 787 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:00,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:00,187 INFO L93 Difference]: Finished difference Result 334 states and 833 transitions. [2021-07-13 19:52:00,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:52:00,187 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:00,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:00,187 INFO L225 Difference]: With dead ends: 334 [2021-07-13 19:52:00,187 INFO L226 Difference]: Without dead ends: 326 [2021-07-13 19:52:00,188 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 395.2ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:52:00,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-07-13 19:52:00,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 303. [2021-07-13 19:52:00,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.596026490066225) internal successors, (784), 302 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:00,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 784 transitions. [2021-07-13 19:52:00,191 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 784 transitions. Word has length 19 [2021-07-13 19:52:00,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:00,191 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 784 transitions. [2021-07-13 19:52:00,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:00,191 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 784 transitions. [2021-07-13 19:52:00,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:00,191 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:00,191 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:00,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15475 [2021-07-13 19:52:00,392 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:00,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:00,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1005224066, now seen corresponding path program 542 times [2021-07-13 19:52:00,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:00,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514144060] [2021-07-13 19:52:00,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:00,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:00,475 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:00,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:00,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514144060] [2021-07-13 19:52:00,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514144060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:00,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580403935] [2021-07-13 19:52:00,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:00,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:00,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:00,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:00,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:00,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:00,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:00,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:00,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:00,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:00,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:00,639 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:00,660 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-07-13 19:52:00,660 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:00,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:00,661 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-07-13 19:52:00,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:00,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580403935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:00,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:00,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:52:00,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596420543] [2021-07-13 19:52:00,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:52:00,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:00,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:52:00,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:52:00,685 INFO L87 Difference]: Start difference. First operand 303 states and 784 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:01,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:01,090 INFO L93 Difference]: Finished difference Result 358 states and 888 transitions. [2021-07-13 19:52:01,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:52:01,091 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:01,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:01,091 INFO L225 Difference]: With dead ends: 358 [2021-07-13 19:52:01,091 INFO L226 Difference]: Without dead ends: 358 [2021-07-13 19:52:01,091 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 425.5ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:52:01,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-07-13 19:52:01,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 303. [2021-07-13 19:52:01,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.596026490066225) internal successors, (784), 302 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:01,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 784 transitions. [2021-07-13 19:52:01,094 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 784 transitions. Word has length 19 [2021-07-13 19:52:01,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:01,095 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 784 transitions. [2021-07-13 19:52:01,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:01,095 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 784 transitions. [2021-07-13 19:52:01,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:01,095 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:01,095 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:01,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15488,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:01,296 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:01,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:01,296 INFO L82 PathProgramCache]: Analyzing trace with hash -967070075, now seen corresponding path program 543 times [2021-07-13 19:52:01,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:01,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140555760] [2021-07-13 19:52:01,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:01,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:01,380 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:01,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:01,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140555760] [2021-07-13 19:52:01,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140555760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:01,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957568259] [2021-07-13 19:52:01,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:01,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:52:01,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:01,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:01,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:01,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:52:01,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:01,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:01,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:01,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:01,587 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:01,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:52:01,589 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:01,623 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-07-13 19:52:01,623 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:01,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:52:01,624 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-07-13 19:52:01,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:01,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957568259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:01,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:01,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:52:01,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315723733] [2021-07-13 19:52:01,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:52:01,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:01,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:52:01,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:52:01,658 INFO L87 Difference]: Start difference. First operand 303 states and 784 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:01,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:01,918 INFO L93 Difference]: Finished difference Result 327 states and 821 transitions. [2021-07-13 19:52:01,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:52:01,919 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:01,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:01,919 INFO L225 Difference]: With dead ends: 327 [2021-07-13 19:52:01,919 INFO L226 Difference]: Without dead ends: 321 [2021-07-13 19:52:01,919 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 319.6ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:52:01,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-07-13 19:52:01,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 306. [2021-07-13 19:52:01,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.580327868852459) internal successors, (787), 305 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:01,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 787 transitions. [2021-07-13 19:52:01,923 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 787 transitions. Word has length 19 [2021-07-13 19:52:01,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:01,923 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 787 transitions. [2021-07-13 19:52:01,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:01,923 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 787 transitions. [2021-07-13 19:52:01,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:01,923 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:01,923 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:02,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15492,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:02,124 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:02,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:02,124 INFO L82 PathProgramCache]: Analyzing trace with hash 2045459864, now seen corresponding path program 544 times [2021-07-13 19:52:02,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:02,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212802558] [2021-07-13 19:52:02,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:02,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:02,206 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:02,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:02,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212802558] [2021-07-13 19:52:02,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212802558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:02,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189078859] [2021-07-13 19:52:02,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:02,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:52:02,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:02,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:02,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:02,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:02,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:02,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:02,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:02,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:02,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:02,369 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:02,390 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-07-13 19:52:02,390 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:02,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:02,391 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-07-13 19:52:02,413 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:02,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189078859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:02,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:02,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:52:02,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513484967] [2021-07-13 19:52:02,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:52:02,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:02,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:52:02,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:52:02,414 INFO L87 Difference]: Start difference. First operand 306 states and 787 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:02,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:02,623 INFO L93 Difference]: Finished difference Result 351 states and 870 transitions. [2021-07-13 19:52:02,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:52:02,624 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:02,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:02,624 INFO L225 Difference]: With dead ends: 351 [2021-07-13 19:52:02,624 INFO L226 Difference]: Without dead ends: 351 [2021-07-13 19:52:02,624 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 233.1ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:52:02,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-07-13 19:52:02,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 303. [2021-07-13 19:52:02,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.5728476821192054) internal successors, (777), 302 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:02,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 777 transitions. [2021-07-13 19:52:02,628 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 777 transitions. Word has length 19 [2021-07-13 19:52:02,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:02,628 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 777 transitions. [2021-07-13 19:52:02,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:02,628 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 777 transitions. [2021-07-13 19:52:02,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:02,628 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:02,628 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:02,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15507 [2021-07-13 19:52:02,829 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:02,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:02,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1999199801, now seen corresponding path program 545 times [2021-07-13 19:52:02,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:02,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146712681] [2021-07-13 19:52:02,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:02,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:02,912 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:02,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:02,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146712681] [2021-07-13 19:52:02,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146712681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:02,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756190535] [2021-07-13 19:52:02,912 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:02,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:52:02,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:02,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:02,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:03,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:52:03,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:03,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:52:03,108 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:03,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:03,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:03,111 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:03,144 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-07-13 19:52:03,145 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:03,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:52:03,145 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-07-13 19:52:03,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:03,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756190535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:03,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:03,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:52:03,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382876259] [2021-07-13 19:52:03,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:52:03,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:03,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:52:03,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:52:03,174 INFO L87 Difference]: Start difference. First operand 303 states and 777 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:03,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:03,344 INFO L93 Difference]: Finished difference Result 325 states and 809 transitions. [2021-07-13 19:52:03,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:52:03,344 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:03,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:03,345 INFO L225 Difference]: With dead ends: 325 [2021-07-13 19:52:03,345 INFO L226 Difference]: Without dead ends: 309 [2021-07-13 19:52:03,345 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 256.2ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:52:03,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-07-13 19:52:03,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 303. [2021-07-13 19:52:03,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.566225165562914) internal successors, (775), 302 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:03,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 775 transitions. [2021-07-13 19:52:03,348 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 775 transitions. Word has length 19 [2021-07-13 19:52:03,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:03,348 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 775 transitions. [2021-07-13 19:52:03,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:03,348 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 775 transitions. [2021-07-13 19:52:03,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:03,348 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:03,349 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:03,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 549 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15511 [2021-07-13 19:52:03,549 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:03,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:03,549 INFO L82 PathProgramCache]: Analyzing trace with hash 2021031274, now seen corresponding path program 546 times [2021-07-13 19:52:03,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:03,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564402776] [2021-07-13 19:52:03,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:03,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:03,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:03,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:03,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564402776] [2021-07-13 19:52:03,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564402776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:03,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080937756] [2021-07-13 19:52:03,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:03,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:52:03,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:03,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:03,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:03,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:52:03,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:03,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:52:03,836 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:03,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:03,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:03,839 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:03,873 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-07-13 19:52:03,873 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:03,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:52:03,874 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-07-13 19:52:03,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:03,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080937756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:03,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:03,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:52:03,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182288984] [2021-07-13 19:52:03,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:52:03,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:03,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:52:03,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:52:03,902 INFO L87 Difference]: Start difference. First operand 303 states and 775 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:04,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:04,270 INFO L93 Difference]: Finished difference Result 421 states and 959 transitions. [2021-07-13 19:52:04,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:52:04,270 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:04,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:04,271 INFO L225 Difference]: With dead ends: 421 [2021-07-13 19:52:04,271 INFO L226 Difference]: Without dead ends: 406 [2021-07-13 19:52:04,271 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 361.6ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:52:04,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-07-13 19:52:04,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 309. [2021-07-13 19:52:04,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.5551948051948052) internal successors, (787), 308 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:04,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 787 transitions. [2021-07-13 19:52:04,275 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 787 transitions. Word has length 19 [2021-07-13 19:52:04,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:04,275 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 787 transitions. [2021-07-13 19:52:04,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:04,275 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 787 transitions. [2021-07-13 19:52:04,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:04,275 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:04,275 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:04,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15524 [2021-07-13 19:52:04,476 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:04,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:04,476 INFO L82 PathProgramCache]: Analyzing trace with hash -2059863861, now seen corresponding path program 547 times [2021-07-13 19:52:04,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:04,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831331120] [2021-07-13 19:52:04,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:04,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:04,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:04,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:04,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831331120] [2021-07-13 19:52:04,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831331120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:04,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211655392] [2021-07-13 19:52:04,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:04,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:04,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:04,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:04,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:04,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:04,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:04,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:04,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:04,730 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:04,750 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-07-13 19:52:04,751 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:04,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:04,751 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-07-13 19:52:04,773 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:04,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211655392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:04,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:04,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:52:04,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375335238] [2021-07-13 19:52:04,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:52:04,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:04,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:52:04,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:52:04,774 INFO L87 Difference]: Start difference. First operand 309 states and 787 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:05,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:05,059 INFO L93 Difference]: Finished difference Result 458 states and 1048 transitions. [2021-07-13 19:52:05,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:52:05,059 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:05,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:05,060 INFO L225 Difference]: With dead ends: 458 [2021-07-13 19:52:05,060 INFO L226 Difference]: Without dead ends: 458 [2021-07-13 19:52:05,060 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 230.6ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:52:05,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-07-13 19:52:05,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 323. [2021-07-13 19:52:05,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.5527950310559007) internal successors, (822), 322 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:05,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 822 transitions. [2021-07-13 19:52:05,064 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 822 transitions. Word has length 19 [2021-07-13 19:52:05,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:05,064 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 822 transitions. [2021-07-13 19:52:05,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:05,064 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 822 transitions. [2021-07-13 19:52:05,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:05,065 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:05,065 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:05,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 551 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15537 [2021-07-13 19:52:05,265 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:05,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:05,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1414450266, now seen corresponding path program 548 times [2021-07-13 19:52:05,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:05,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773445001] [2021-07-13 19:52:05,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:05,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:05,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:05,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:05,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773445001] [2021-07-13 19:52:05,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773445001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:05,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261332131] [2021-07-13 19:52:05,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:05,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:05,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:05,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:05,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:05,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:05,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:05,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:05,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:05,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:52:05,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:05,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:52:05,562 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:05,597 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-07-13 19:52:05,597 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:05,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:52:05,598 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-07-13 19:52:05,626 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:05,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261332131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:05,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:05,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:52:05,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018577494] [2021-07-13 19:52:05,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:52:05,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:05,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:52:05,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:52:05,627 INFO L87 Difference]: Start difference. First operand 323 states and 822 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:06,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:06,211 INFO L93 Difference]: Finished difference Result 466 states and 1043 transitions. [2021-07-13 19:52:06,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:52:06,212 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:06,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:06,212 INFO L225 Difference]: With dead ends: 466 [2021-07-13 19:52:06,212 INFO L226 Difference]: Without dead ends: 445 [2021-07-13 19:52:06,213 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 548.4ms TimeCoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:52:06,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-07-13 19:52:06,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 326. [2021-07-13 19:52:06,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.5507692307692307) internal successors, (829), 325 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:06,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 829 transitions. [2021-07-13 19:52:06,216 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 829 transitions. Word has length 19 [2021-07-13 19:52:06,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:06,216 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 829 transitions. [2021-07-13 19:52:06,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:06,216 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 829 transitions. [2021-07-13 19:52:06,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:06,217 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:06,217 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:06,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15541,552 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:06,417 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:06,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:06,418 INFO L82 PathProgramCache]: Analyzing trace with hash 116475941, now seen corresponding path program 549 times [2021-07-13 19:52:06,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:06,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58729858] [2021-07-13 19:52:06,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:06,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:06,501 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:06,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:06,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58729858] [2021-07-13 19:52:06,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58729858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:06,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058659852] [2021-07-13 19:52:06,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:06,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:52:06,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:06,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:06,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:06,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:06,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:06,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:06,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:06,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:06,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:06,668 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:06,688 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-07-13 19:52:06,688 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:06,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:06,689 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-07-13 19:52:06,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:06,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058659852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:06,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:06,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:52:06,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360435739] [2021-07-13 19:52:06,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:52:06,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:06,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:52:06,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:52:06,712 INFO L87 Difference]: Start difference. First operand 326 states and 829 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:07,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:07,177 INFO L93 Difference]: Finished difference Result 503 states and 1147 transitions. [2021-07-13 19:52:07,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:52:07,177 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:07,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:07,178 INFO L225 Difference]: With dead ends: 503 [2021-07-13 19:52:07,178 INFO L226 Difference]: Without dead ends: 494 [2021-07-13 19:52:07,178 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 434.5ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:52:07,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-07-13 19:52:07,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 313. [2021-07-13 19:52:07,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.5608974358974357) internal successors, (799), 312 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:07,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 799 transitions. [2021-07-13 19:52:07,182 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 799 transitions. Word has length 19 [2021-07-13 19:52:07,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:07,182 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 799 transitions. [2021-07-13 19:52:07,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:07,182 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 799 transitions. [2021-07-13 19:52:07,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:07,182 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:07,182 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:07,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15554,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:07,383 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:07,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:07,383 INFO L82 PathProgramCache]: Analyzing trace with hash -278346262, now seen corresponding path program 550 times [2021-07-13 19:52:07,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:07,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696333789] [2021-07-13 19:52:07,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:07,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:07,467 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:07,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:07,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696333789] [2021-07-13 19:52:07,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696333789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:07,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410826706] [2021-07-13 19:52:07,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:07,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:52:07,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:07,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:07,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:07,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:52:07,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:07,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:07,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:07,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:07,677 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:07,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:52:07,680 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:07,713 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-07-13 19:52:07,714 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:07,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:52:07,714 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-07-13 19:52:07,742 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:07,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410826706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:07,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:07,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:52:07,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932228901] [2021-07-13 19:52:07,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:52:07,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:07,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:52:07,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:52:07,743 INFO L87 Difference]: Start difference. First operand 313 states and 799 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:08,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:08,331 INFO L93 Difference]: Finished difference Result 427 states and 971 transitions. [2021-07-13 19:52:08,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:52:08,331 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:08,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:08,332 INFO L225 Difference]: With dead ends: 427 [2021-07-13 19:52:08,332 INFO L226 Difference]: Without dead ends: 409 [2021-07-13 19:52:08,332 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 566.3ms TimeCoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:52:08,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-07-13 19:52:08,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 313. [2021-07-13 19:52:08,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.548076923076923) internal successors, (795), 312 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:08,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 795 transitions. [2021-07-13 19:52:08,336 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 795 transitions. Word has length 19 [2021-07-13 19:52:08,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:08,336 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 795 transitions. [2021-07-13 19:52:08,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:08,336 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 795 transitions. [2021-07-13 19:52:08,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:08,336 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:08,336 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:08,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 554 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15558 [2021-07-13 19:52:08,537 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:08,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:08,537 INFO L82 PathProgramCache]: Analyzing trace with hash 463775115, now seen corresponding path program 551 times [2021-07-13 19:52:08,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:08,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597341211] [2021-07-13 19:52:08,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:08,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:08,621 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:08,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:08,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597341211] [2021-07-13 19:52:08,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597341211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:08,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66111749] [2021-07-13 19:52:08,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:08,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:52:08,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:08,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:08,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:08,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:08,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:08,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:08,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:08,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:08,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:08,788 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:08,813 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-07-13 19:52:08,813 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:08,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:08,814 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-07-13 19:52:08,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:08,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66111749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:08,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:08,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:52:08,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455547507] [2021-07-13 19:52:08,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:52:08,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:08,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:52:08,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:52:08,836 INFO L87 Difference]: Start difference. First operand 313 states and 795 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:09,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:09,732 INFO L93 Difference]: Finished difference Result 503 states and 1129 transitions. [2021-07-13 19:52:09,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:52:09,733 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:09,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:09,733 INFO L225 Difference]: With dead ends: 503 [2021-07-13 19:52:09,733 INFO L226 Difference]: Without dead ends: 479 [2021-07-13 19:52:09,734 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 813.3ms TimeCoverageRelationStatistics Valid=205, Invalid=1201, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:52:09,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-07-13 19:52:09,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 291. [2021-07-13 19:52:09,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.513793103448276) internal successors, (729), 290 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:09,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 729 transitions. [2021-07-13 19:52:09,737 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 729 transitions. Word has length 19 [2021-07-13 19:52:09,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:09,737 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 729 transitions. [2021-07-13 19:52:09,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:09,737 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 729 transitions. [2021-07-13 19:52:09,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:09,738 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:09,738 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:09,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15571,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:09,938 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:09,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:09,938 INFO L82 PathProgramCache]: Analyzing trace with hash -518792410, now seen corresponding path program 552 times [2021-07-13 19:52:09,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:09,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415957145] [2021-07-13 19:52:09,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:09,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:10,020 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:10,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:10,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415957145] [2021-07-13 19:52:10,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415957145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:10,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84710933] [2021-07-13 19:52:10,020 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:10,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:52:10,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:10,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:10,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:10,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:10,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:10,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:10,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:10,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:10,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:10,217 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:10,245 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:52:10,246 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:10,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:10,246 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:52:10,299 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:10,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84710933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:10,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:10,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:52:10,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709566289] [2021-07-13 19:52:10,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:52:10,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:10,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:52:10,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:52:10,300 INFO L87 Difference]: Start difference. First operand 291 states and 729 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:11,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:11,237 INFO L93 Difference]: Finished difference Result 472 states and 1016 transitions. [2021-07-13 19:52:11,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:52:11,237 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:11,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:11,238 INFO L225 Difference]: With dead ends: 472 [2021-07-13 19:52:11,238 INFO L226 Difference]: Without dead ends: 463 [2021-07-13 19:52:11,238 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 851.1ms TimeCoverageRelationStatistics Valid=208, Invalid=1352, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:52:11,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-07-13 19:52:11,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 296. [2021-07-13 19:52:11,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.528813559322034) internal successors, (746), 295 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:11,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 746 transitions. [2021-07-13 19:52:11,242 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 746 transitions. Word has length 19 [2021-07-13 19:52:11,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:11,242 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 746 transitions. [2021-07-13 19:52:11,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:11,242 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 746 transitions. [2021-07-13 19:52:11,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:11,242 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:11,242 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:11,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15575,556 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:11,443 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:11,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:11,443 INFO L82 PathProgramCache]: Analyzing trace with hash -771947675, now seen corresponding path program 553 times [2021-07-13 19:52:11,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:11,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824897440] [2021-07-13 19:52:11,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:11,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:11,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:11,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:11,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824897440] [2021-07-13 19:52:11,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824897440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:11,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965930612] [2021-07-13 19:52:11,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:11,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:11,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:11,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:11,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:11,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:11,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:11,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:11,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:52:11,684 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:11,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:11,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:11,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:11,688 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:11,690 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:52:11,690 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:11,722 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-07-13 19:52:11,723 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:11,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:11,724 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:52:11,770 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:11,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965930612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:11,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:11,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:52:11,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860459006] [2021-07-13 19:52:11,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:52:11,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:11,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:52:11,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:52:11,771 INFO L87 Difference]: Start difference. First operand 296 states and 746 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:12,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:12,599 INFO L93 Difference]: Finished difference Result 466 states and 1010 transitions. [2021-07-13 19:52:12,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:52:12,599 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:12,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:12,599 INFO L225 Difference]: With dead ends: 466 [2021-07-13 19:52:12,599 INFO L226 Difference]: Without dead ends: 457 [2021-07-13 19:52:12,600 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 773.6ms TimeCoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:52:12,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-07-13 19:52:12,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 287. [2021-07-13 19:52:12,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.4965034965034967) internal successors, (714), 286 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:12,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 714 transitions. [2021-07-13 19:52:12,603 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 714 transitions. Word has length 19 [2021-07-13 19:52:12,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:12,603 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 714 transitions. [2021-07-13 19:52:12,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:12,603 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 714 transitions. [2021-07-13 19:52:12,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:12,603 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:12,603 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:12,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15593,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:12,804 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:12,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:12,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1219285398, now seen corresponding path program 554 times [2021-07-13 19:52:12,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:12,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873458706] [2021-07-13 19:52:12,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:12,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:12,886 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:12,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:12,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873458706] [2021-07-13 19:52:12,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873458706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:12,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823964209] [2021-07-13 19:52:12,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:12,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:12,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:12,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:12,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:13,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:13,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:13,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:13,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:13,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:13,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:13,085 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:13,113 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:52:13,113 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:13,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:13,114 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:52:13,159 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:13,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823964209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:13,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:13,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:52:13,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597021521] [2021-07-13 19:52:13,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:52:13,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:13,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:52:13,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:52:13,159 INFO L87 Difference]: Start difference. First operand 287 states and 714 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:13,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:13,570 INFO L93 Difference]: Finished difference Result 388 states and 871 transitions. [2021-07-13 19:52:13,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:52:13,571 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:13,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:13,571 INFO L225 Difference]: With dead ends: 388 [2021-07-13 19:52:13,571 INFO L226 Difference]: Without dead ends: 388 [2021-07-13 19:52:13,571 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 427.8ms TimeCoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:52:13,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-07-13 19:52:13,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 283. [2021-07-13 19:52:13,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.475177304964539) internal successors, (698), 282 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:13,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 698 transitions. [2021-07-13 19:52:13,574 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 698 transitions. Word has length 19 [2021-07-13 19:52:13,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:13,575 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 698 transitions. [2021-07-13 19:52:13,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:13,575 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 698 transitions. [2021-07-13 19:52:13,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:13,575 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:13,575 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:13,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 558 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15603 [2021-07-13 19:52:13,776 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:13,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:13,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1092884653, now seen corresponding path program 555 times [2021-07-13 19:52:13,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:13,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867576708] [2021-07-13 19:52:13,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:13,857 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:13,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:13,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867576708] [2021-07-13 19:52:13,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867576708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:13,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836339816] [2021-07-13 19:52:13,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:13,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:52:13,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:13,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:13,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:14,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:52:14,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:14,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:52:14,035 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:14,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:14,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:14,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:14,038 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:14,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:14,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:14,041 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:14,075 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-07-13 19:52:14,076 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:14,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:14,077 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:52:14,143 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:14,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836339816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:14,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:14,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:52:14,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592187137] [2021-07-13 19:52:14,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:52:14,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:14,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:52:14,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:52:14,144 INFO L87 Difference]: Start difference. First operand 283 states and 698 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:15,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:15,132 INFO L93 Difference]: Finished difference Result 356 states and 818 transitions. [2021-07-13 19:52:15,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:52:15,132 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:15,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:15,133 INFO L225 Difference]: With dead ends: 356 [2021-07-13 19:52:15,133 INFO L226 Difference]: Without dead ends: 350 [2021-07-13 19:52:15,133 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 947.4ms TimeCoverageRelationStatistics Valid=215, Invalid=1425, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:52:15,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-07-13 19:52:15,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 270. [2021-07-13 19:52:15,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.475836431226766) internal successors, (666), 269 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:15,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 666 transitions. [2021-07-13 19:52:15,136 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 666 transitions. Word has length 19 [2021-07-13 19:52:15,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:15,136 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 666 transitions. [2021-07-13 19:52:15,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:15,136 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 666 transitions. [2021-07-13 19:52:15,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:15,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:15,137 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:15,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15619 [2021-07-13 19:52:15,337 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:15,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:15,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1003239920, now seen corresponding path program 556 times [2021-07-13 19:52:15,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:15,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86619548] [2021-07-13 19:52:15,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:15,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:15,396 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:15,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:15,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86619548] [2021-07-13 19:52:15,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86619548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:15,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428778443] [2021-07-13 19:52:15,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:15,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:52:15,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:15,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:15,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:15,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:15,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:15,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:15,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:15,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:15,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:15,547 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:15,572 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:52:15,572 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:15,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:15,572 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:52:15,625 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:15,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428778443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:15,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:15,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:52:15,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824493940] [2021-07-13 19:52:15,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:52:15,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:15,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:52:15,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:52:15,626 INFO L87 Difference]: Start difference. First operand 270 states and 666 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:15,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:15,969 INFO L93 Difference]: Finished difference Result 384 states and 882 transitions. [2021-07-13 19:52:15,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:52:15,969 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:15,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:15,969 INFO L225 Difference]: With dead ends: 384 [2021-07-13 19:52:15,969 INFO L226 Difference]: Without dead ends: 378 [2021-07-13 19:52:15,969 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 332.3ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:52:15,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-07-13 19:52:15,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 280. [2021-07-13 19:52:15,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.5089605734767026) internal successors, (700), 279 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:15,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 700 transitions. [2021-07-13 19:52:15,973 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 700 transitions. Word has length 19 [2021-07-13 19:52:15,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:15,973 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 700 transitions. [2021-07-13 19:52:15,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:15,973 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 700 transitions. [2021-07-13 19:52:15,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:15,973 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:15,973 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:16,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 560 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15632 [2021-07-13 19:52:16,174 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:16,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:16,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1256395185, now seen corresponding path program 557 times [2021-07-13 19:52:16,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:16,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017768471] [2021-07-13 19:52:16,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:16,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:16,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:16,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:16,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017768471] [2021-07-13 19:52:16,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017768471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:16,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766510666] [2021-07-13 19:52:16,232 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:16,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:52:16,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:16,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:16,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:16,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:16,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:16,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:16,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:16,418 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:52:16,418 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:16,453 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-07-13 19:52:16,453 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:16,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:52:16,456 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:16,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:16,477 INFO L518 ElimStorePlain]: Eliminatee v_prenex_586 vanished before elimination [2021-07-13 19:52:16,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:16,478 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:52:16,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:16,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766510666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:16,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:16,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:52:16,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475398290] [2021-07-13 19:52:16,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:52:16,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:16,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:52:16,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:52:16,529 INFO L87 Difference]: Start difference. First operand 280 states and 700 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:16,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:16,738 INFO L93 Difference]: Finished difference Result 368 states and 852 transitions. [2021-07-13 19:52:16,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:52:16,738 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:16,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:16,739 INFO L225 Difference]: With dead ends: 368 [2021-07-13 19:52:16,739 INFO L226 Difference]: Without dead ends: 368 [2021-07-13 19:52:16,739 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 211.6ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:52:16,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-07-13 19:52:16,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 280. [2021-07-13 19:52:16,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.5089605734767026) internal successors, (700), 279 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:16,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 700 transitions. [2021-07-13 19:52:16,742 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 700 transitions. Word has length 19 [2021-07-13 19:52:16,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:16,742 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 700 transitions. [2021-07-13 19:52:16,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:16,742 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 700 transitions. [2021-07-13 19:52:16,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:16,743 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:16,743 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:16,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15642,561 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:16,943 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:16,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:16,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1703732908, now seen corresponding path program 558 times [2021-07-13 19:52:16,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:16,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346140594] [2021-07-13 19:52:16,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:16,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:17,001 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:17,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:17,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346140594] [2021-07-13 19:52:17,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346140594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:17,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480698202] [2021-07-13 19:52:17,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:17,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:52:17,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:17,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:17,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:17,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:17,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:17,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:17,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:17,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:17,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:17,157 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:17,182 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:52:17,182 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:17,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:17,183 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:52:17,224 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:17,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480698202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:17,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:17,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:52:17,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164233105] [2021-07-13 19:52:17,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:52:17,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:17,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:52:17,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:52:17,225 INFO L87 Difference]: Start difference. First operand 280 states and 700 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:17,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:17,457 INFO L93 Difference]: Finished difference Result 394 states and 901 transitions. [2021-07-13 19:52:17,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:52:17,458 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:17,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:17,458 INFO L225 Difference]: With dead ends: 394 [2021-07-13 19:52:17,458 INFO L226 Difference]: Without dead ends: 394 [2021-07-13 19:52:17,458 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 231.6ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:52:17,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-07-13 19:52:17,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 278. [2021-07-13 19:52:17,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.4981949458483754) internal successors, (692), 277 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:17,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 692 transitions. [2021-07-13 19:52:17,462 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 692 transitions. Word has length 19 [2021-07-13 19:52:17,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:17,462 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 692 transitions. [2021-07-13 19:52:17,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:17,462 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 692 transitions. [2021-07-13 19:52:17,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:17,462 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:17,462 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:17,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15659 [2021-07-13 19:52:17,663 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:17,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:17,663 INFO L82 PathProgramCache]: Analyzing trace with hash 608437143, now seen corresponding path program 559 times [2021-07-13 19:52:17,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:17,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163597249] [2021-07-13 19:52:17,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:17,720 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:17,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:17,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163597249] [2021-07-13 19:52:17,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163597249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:17,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52745097] [2021-07-13 19:52:17,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:17,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:17,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:17,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:17,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:17,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:17,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:17,895 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:52:17,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:17,932 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-07-13 19:52:17,932 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:17,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:52:17,935 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:17,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:17,949 INFO L518 ElimStorePlain]: Eliminatee v_prenex_589 vanished before elimination [2021-07-13 19:52:17,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:17,951 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:52:18,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:18,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52745097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:18,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:18,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:52:18,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165735468] [2021-07-13 19:52:18,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:52:18,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:18,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:52:18,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:52:18,023 INFO L87 Difference]: Start difference. First operand 278 states and 692 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:18,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:18,403 INFO L93 Difference]: Finished difference Result 358 states and 822 transitions. [2021-07-13 19:52:18,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:52:18,416 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:18,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:18,417 INFO L225 Difference]: With dead ends: 358 [2021-07-13 19:52:18,417 INFO L226 Difference]: Without dead ends: 354 [2021-07-13 19:52:18,417 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 361.9ms TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:52:18,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-07-13 19:52:18,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 276. [2021-07-13 19:52:18,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.4945454545454546) internal successors, (686), 275 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:18,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 686 transitions. [2021-07-13 19:52:18,420 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 686 transitions. Word has length 19 [2021-07-13 19:52:18,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:18,420 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 686 transitions. [2021-07-13 19:52:18,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:18,421 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 686 transitions. [2021-07-13 19:52:18,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:18,421 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:18,421 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:18,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15667 [2021-07-13 19:52:18,621 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:18,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:18,622 INFO L82 PathProgramCache]: Analyzing trace with hash 2056004586, now seen corresponding path program 560 times [2021-07-13 19:52:18,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:18,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347107386] [2021-07-13 19:52:18,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:18,682 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:18,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:18,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347107386] [2021-07-13 19:52:18,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347107386] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:18,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394260792] [2021-07-13 19:52:18,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:18,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:18,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:18,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:18,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:18,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:18,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:18,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:18,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:18,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:18,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:18,850 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:18,871 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:52:18,871 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:18,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:18,871 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:52:18,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:18,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394260792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:18,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:18,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:52:18,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241145201] [2021-07-13 19:52:18,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:52:18,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:18,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:52:18,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:52:18,893 INFO L87 Difference]: Start difference. First operand 276 states and 686 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:19,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:19,114 INFO L93 Difference]: Finished difference Result 344 states and 809 transitions. [2021-07-13 19:52:19,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:52:19,114 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:19,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:19,115 INFO L225 Difference]: With dead ends: 344 [2021-07-13 19:52:19,115 INFO L226 Difference]: Without dead ends: 344 [2021-07-13 19:52:19,115 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 195.3ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:52:19,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-07-13 19:52:19,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 272. [2021-07-13 19:52:19,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.4797047970479706) internal successors, (672), 271 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:19,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 672 transitions. [2021-07-13 19:52:19,118 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 672 transitions. Word has length 19 [2021-07-13 19:52:19,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:19,121 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 672 transitions. [2021-07-13 19:52:19,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:19,121 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 672 transitions. [2021-07-13 19:52:19,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:19,122 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:19,122 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:19,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15681 [2021-07-13 19:52:19,322 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:19,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:19,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1684148299, now seen corresponding path program 561 times [2021-07-13 19:52:19,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:19,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789189583] [2021-07-13 19:52:19,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:19,381 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:19,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:19,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789189583] [2021-07-13 19:52:19,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789189583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:19,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671897812] [2021-07-13 19:52:19,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:19,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:52:19,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:19,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:19,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:19,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:19,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:19,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:19,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:19,637 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:52:19,637 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:19,671 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:52:19,672 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:19,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:52:19,674 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:19,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:19,687 INFO L518 ElimStorePlain]: Eliminatee v_prenex_593 vanished before elimination [2021-07-13 19:52:19,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:52:19,688 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:52:19,715 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:19,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671897812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:19,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:19,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:52:19,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038929303] [2021-07-13 19:52:19,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:52:19,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:19,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:52:19,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:52:19,716 INFO L87 Difference]: Start difference. First operand 272 states and 672 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:19,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:19,974 INFO L93 Difference]: Finished difference Result 303 states and 718 transitions. [2021-07-13 19:52:19,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:52:19,974 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:19,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:19,975 INFO L225 Difference]: With dead ends: 303 [2021-07-13 19:52:19,975 INFO L226 Difference]: Without dead ends: 295 [2021-07-13 19:52:19,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 279.1ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:52:19,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-07-13 19:52:19,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 261. [2021-07-13 19:52:19,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.4884615384615385) internal successors, (647), 260 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:19,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 647 transitions. [2021-07-13 19:52:19,978 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 647 transitions. Word has length 19 [2021-07-13 19:52:19,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:19,978 INFO L482 AbstractCegarLoop]: Abstraction has 261 states and 647 transitions. [2021-07-13 19:52:19,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:19,978 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 647 transitions. [2021-07-13 19:52:19,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:19,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:19,978 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:20,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15685,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:20,179 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:20,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:20,179 INFO L82 PathProgramCache]: Analyzing trace with hash -228778518, now seen corresponding path program 562 times [2021-07-13 19:52:20,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:20,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035794750] [2021-07-13 19:52:20,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:20,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:20,238 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:20,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:20,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035794750] [2021-07-13 19:52:20,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035794750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:20,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571457227] [2021-07-13 19:52:20,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:20,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:52:20,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:20,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:20,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:20,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:52:20,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:20,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:20,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:20,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:20,416 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:20,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:52:20,419 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:20,454 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-07-13 19:52:20,454 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:20,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:52:20,455 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-07-13 19:52:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:20,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571457227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:20,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:20,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:52:20,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863873362] [2021-07-13 19:52:20,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:52:20,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:20,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:52:20,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:52:20,482 INFO L87 Difference]: Start difference. First operand 261 states and 647 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:20,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:20,913 INFO L93 Difference]: Finished difference Result 322 states and 746 transitions. [2021-07-13 19:52:20,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:52:20,914 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:20,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:20,914 INFO L225 Difference]: With dead ends: 322 [2021-07-13 19:52:20,914 INFO L226 Difference]: Without dead ends: 310 [2021-07-13 19:52:20,914 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 405.4ms TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:52:20,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-07-13 19:52:20,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 259. [2021-07-13 19:52:20,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.4806201550387597) internal successors, (640), 258 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:20,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 640 transitions. [2021-07-13 19:52:20,917 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 640 transitions. Word has length 19 [2021-07-13 19:52:20,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:20,917 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 640 transitions. [2021-07-13 19:52:20,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:20,917 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 640 transitions. [2021-07-13 19:52:20,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:20,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:20,917 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:21,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 566 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15712 [2021-07-13 19:52:21,118 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:21,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:21,118 INFO L82 PathProgramCache]: Analyzing trace with hash 513342859, now seen corresponding path program 563 times [2021-07-13 19:52:21,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:21,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090777442] [2021-07-13 19:52:21,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:21,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:21,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:21,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090777442] [2021-07-13 19:52:21,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090777442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:21,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285447458] [2021-07-13 19:52:21,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:21,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:52:21,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:21,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:21,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:21,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:21,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:21,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:21,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:21,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:21,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:21,325 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:21,346 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-07-13 19:52:21,346 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:21,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:21,347 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-07-13 19:52:21,366 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:21,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285447458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:21,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:21,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:52:21,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562304125] [2021-07-13 19:52:21,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:52:21,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:21,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:52:21,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:52:21,367 INFO L87 Difference]: Start difference. First operand 259 states and 640 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:21,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:21,653 INFO L93 Difference]: Finished difference Result 400 states and 907 transitions. [2021-07-13 19:52:21,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:52:21,654 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:21,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:21,654 INFO L225 Difference]: With dead ends: 400 [2021-07-13 19:52:21,654 INFO L226 Difference]: Without dead ends: 400 [2021-07-13 19:52:21,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 266.2ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:52:21,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-07-13 19:52:21,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 263. [2021-07-13 19:52:21,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.4885496183206106) internal successors, (652), 262 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:21,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 652 transitions. [2021-07-13 19:52:21,658 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 652 transitions. Word has length 19 [2021-07-13 19:52:21,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:21,658 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 652 transitions. [2021-07-13 19:52:21,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:21,658 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 652 transitions. [2021-07-13 19:52:21,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:21,658 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:21,658 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:21,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15725,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:21,859 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:21,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:21,859 INFO L82 PathProgramCache]: Analyzing trace with hash -469224666, now seen corresponding path program 564 times [2021-07-13 19:52:21,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:21,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645516473] [2021-07-13 19:52:21,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:21,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:21,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:21,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:21,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645516473] [2021-07-13 19:52:21,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645516473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:21,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206062448] [2021-07-13 19:52:21,917 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:21,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:52:21,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:21,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:21,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:22,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:22,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:22,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:22,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:22,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:22,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:22,091 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:22,120 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:52:22,120 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:22,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:22,121 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:52:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:22,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206062448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:22,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:22,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:52:22,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157785537] [2021-07-13 19:52:22,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:52:22,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:22,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:52:22,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:52:22,170 INFO L87 Difference]: Start difference. First operand 263 states and 652 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:23,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:23,207 INFO L93 Difference]: Finished difference Result 468 states and 988 transitions. [2021-07-13 19:52:23,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:52:23,207 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:23,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:23,208 INFO L225 Difference]: With dead ends: 468 [2021-07-13 19:52:23,208 INFO L226 Difference]: Without dead ends: 462 [2021-07-13 19:52:23,208 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 896.5ms TimeCoverageRelationStatistics Valid=263, Invalid=1629, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:52:23,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-07-13 19:52:23,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 267. [2021-07-13 19:52:23,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.507518796992481) internal successors, (667), 266 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:23,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 667 transitions. [2021-07-13 19:52:23,211 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 667 transitions. Word has length 19 [2021-07-13 19:52:23,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:23,211 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 667 transitions. [2021-07-13 19:52:23,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:23,212 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 667 transitions. [2021-07-13 19:52:23,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:23,212 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:23,212 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:23,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 568 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15729 [2021-07-13 19:52:23,412 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:23,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:23,413 INFO L82 PathProgramCache]: Analyzing trace with hash -722379931, now seen corresponding path program 565 times [2021-07-13 19:52:23,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:23,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590621751] [2021-07-13 19:52:23,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:23,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:23,470 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:23,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:23,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590621751] [2021-07-13 19:52:23,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590621751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:23,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457100023] [2021-07-13 19:52:23,471 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:23,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:23,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:23,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:23,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:52:23,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:23,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:23,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:23,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:23,613 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:23,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:23,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:23,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:23,617 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:23,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:52:23,619 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:23,653 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-07-13 19:52:23,653 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:23,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:23,654 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:52:23,695 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:23,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457100023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:23,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:23,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:52:23,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784766867] [2021-07-13 19:52:23,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:52:23,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:23,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:52:23,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:52:23,696 INFO L87 Difference]: Start difference. First operand 267 states and 667 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:24,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:24,195 INFO L93 Difference]: Finished difference Result 486 states and 1050 transitions. [2021-07-13 19:52:24,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:52:24,196 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:24,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:24,196 INFO L225 Difference]: With dead ends: 486 [2021-07-13 19:52:24,196 INFO L226 Difference]: Without dead ends: 480 [2021-07-13 19:52:24,197 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 437.4ms TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:52:24,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-07-13 19:52:24,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 267. [2021-07-13 19:52:24,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.507518796992481) internal successors, (667), 266 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:24,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 667 transitions. [2021-07-13 19:52:24,200 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 667 transitions. Word has length 19 [2021-07-13 19:52:24,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:24,200 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 667 transitions. [2021-07-13 19:52:24,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:24,200 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 667 transitions. [2021-07-13 19:52:24,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:24,200 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:24,200 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:24,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15747 [2021-07-13 19:52:24,401 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:24,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:24,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1169717654, now seen corresponding path program 566 times [2021-07-13 19:52:24,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:24,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121950994] [2021-07-13 19:52:24,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:24,463 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:24,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:24,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121950994] [2021-07-13 19:52:24,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121950994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:24,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617376189] [2021-07-13 19:52:24,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:24,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:24,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:24,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:24,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:24,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:24,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:24,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:24,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:24,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:24,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:24,631 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:24,659 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:52:24,660 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:24,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:24,660 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:52:24,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:24,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617376189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:24,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:24,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:52:24,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788441396] [2021-07-13 19:52:24,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:52:24,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:24,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:52:24,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:52:24,702 INFO L87 Difference]: Start difference. First operand 267 states and 667 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:25,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:25,136 INFO L93 Difference]: Finished difference Result 359 states and 829 transitions. [2021-07-13 19:52:25,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:52:25,136 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:25,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:25,137 INFO L225 Difference]: With dead ends: 359 [2021-07-13 19:52:25,137 INFO L226 Difference]: Without dead ends: 359 [2021-07-13 19:52:25,137 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 441.5ms TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:52:25,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-07-13 19:52:25,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 264. [2021-07-13 19:52:25,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.4904942965779466) internal successors, (655), 263 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:25,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 655 transitions. [2021-07-13 19:52:25,140 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 655 transitions. Word has length 19 [2021-07-13 19:52:25,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:25,140 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 655 transitions. [2021-07-13 19:52:25,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:25,140 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 655 transitions. [2021-07-13 19:52:25,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:25,140 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:25,140 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:25,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 570 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15756 [2021-07-13 19:52:25,341 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:25,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:25,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1142452397, now seen corresponding path program 567 times [2021-07-13 19:52:25,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:25,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981230104] [2021-07-13 19:52:25,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:25,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:25,398 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:25,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:25,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981230104] [2021-07-13 19:52:25,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981230104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:25,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094687665] [2021-07-13 19:52:25,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:25,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:52:25,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:25,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:25,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:25,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:25,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:25,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:25,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:25,538 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:52:25,538 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:25,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:52:25,541 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:25,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:25,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:25,544 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:25,576 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-07-13 19:52:25,576 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:25,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:25,577 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:52:25,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:25,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094687665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:25,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:25,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:52:25,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371882592] [2021-07-13 19:52:25,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:52:25,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:25,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:52:25,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:52:25,640 INFO L87 Difference]: Start difference. First operand 264 states and 655 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:26,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:26,392 INFO L93 Difference]: Finished difference Result 445 states and 975 transitions. [2021-07-13 19:52:26,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:52:26,393 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:26,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:26,393 INFO L225 Difference]: With dead ends: 445 [2021-07-13 19:52:26,393 INFO L226 Difference]: Without dead ends: 441 [2021-07-13 19:52:26,393 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 669.3ms TimeCoverageRelationStatistics Valid=205, Invalid=1517, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:52:26,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-07-13 19:52:26,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 262. [2021-07-13 19:52:26,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.4904214559386975) internal successors, (650), 261 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:26,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 650 transitions. [2021-07-13 19:52:26,396 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 650 transitions. Word has length 19 [2021-07-13 19:52:26,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:26,397 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 650 transitions. [2021-07-13 19:52:26,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:26,397 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 650 transitions. [2021-07-13 19:52:26,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:26,397 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:26,397 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:26,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15772 [2021-07-13 19:52:26,598 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:26,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:26,598 INFO L82 PathProgramCache]: Analyzing trace with hash 118520656, now seen corresponding path program 568 times [2021-07-13 19:52:26,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:26,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121609183] [2021-07-13 19:52:26,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:26,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:26,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:26,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:26,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121609183] [2021-07-13 19:52:26,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121609183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:26,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017110265] [2021-07-13 19:52:26,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:26,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:52:26,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:26,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:26,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:26,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:26,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:26,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:26,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:26,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:26,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:26,809 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:26,834 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:52:26,834 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:26,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:26,835 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:52:26,883 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:26,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017110265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:26,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:26,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:52:26,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35859385] [2021-07-13 19:52:26,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:52:26,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:26,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:52:26,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:52:26,884 INFO L87 Difference]: Start difference. First operand 262 states and 650 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:28,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:28,065 INFO L93 Difference]: Finished difference Result 534 states and 1133 transitions. [2021-07-13 19:52:28,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 19:52:28,066 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:28,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:28,066 INFO L225 Difference]: With dead ends: 534 [2021-07-13 19:52:28,066 INFO L226 Difference]: Without dead ends: 528 [2021-07-13 19:52:28,066 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 1113.5ms TimeCoverageRelationStatistics Valid=359, Invalid=1993, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 19:52:28,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-07-13 19:52:28,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 274. [2021-07-13 19:52:28,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.5384615384615383) internal successors, (693), 273 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:28,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 693 transitions. [2021-07-13 19:52:28,070 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 693 transitions. Word has length 19 [2021-07-13 19:52:28,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:28,070 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 693 transitions. [2021-07-13 19:52:28,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:28,070 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 693 transitions. [2021-07-13 19:52:28,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:28,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:28,070 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:28,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15785,572 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:28,271 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:28,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:28,271 INFO L82 PathProgramCache]: Analyzing trace with hash -134634609, now seen corresponding path program 569 times [2021-07-13 19:52:28,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:28,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377328551] [2021-07-13 19:52:28,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:28,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:28,329 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:28,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:28,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377328551] [2021-07-13 19:52:28,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377328551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:28,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81867772] [2021-07-13 19:52:28,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:28,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:52:28,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:28,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:28,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:28,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:28,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:28,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:28,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:28,503 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:52:28,504 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:28,539 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-07-13 19:52:28,540 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:28,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:52:28,542 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:28,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:28,556 INFO L518 ElimStorePlain]: Eliminatee v_prenex_596 vanished before elimination [2021-07-13 19:52:28,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:28,557 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:52:28,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:28,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81867772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:28,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:28,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:52:28,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497420927] [2021-07-13 19:52:28,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:52:28,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:28,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:52:28,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:52:28,613 INFO L87 Difference]: Start difference. First operand 274 states and 693 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:29,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:29,088 INFO L93 Difference]: Finished difference Result 390 states and 875 transitions. [2021-07-13 19:52:29,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:52:29,088 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:29,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:29,089 INFO L225 Difference]: With dead ends: 390 [2021-07-13 19:52:29,089 INFO L226 Difference]: Without dead ends: 384 [2021-07-13 19:52:29,089 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 419.2ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:52:29,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-07-13 19:52:29,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 269. [2021-07-13 19:52:29,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.5261194029850746) internal successors, (677), 268 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:29,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 677 transitions. [2021-07-13 19:52:29,092 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 677 transitions. Word has length 19 [2021-07-13 19:52:29,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:29,092 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 677 transitions. [2021-07-13 19:52:29,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:29,092 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 677 transitions. [2021-07-13 19:52:29,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:29,092 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:29,092 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:29,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15795,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:29,293 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:29,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:29,293 INFO L82 PathProgramCache]: Analyzing trace with hash -581972332, now seen corresponding path program 570 times [2021-07-13 19:52:29,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:29,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428464169] [2021-07-13 19:52:29,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:29,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:29,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:29,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:29,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428464169] [2021-07-13 19:52:29,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428464169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:29,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842221359] [2021-07-13 19:52:29,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:29,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:52:29,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:29,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:29,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:29,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:29,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:29,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:29,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:29,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:29,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:29,512 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:29,538 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:52:29,538 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:29,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:29,539 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:52:29,580 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:29,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842221359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:29,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:29,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:52:29,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179173027] [2021-07-13 19:52:29,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:52:29,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:29,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:52:29,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:52:29,581 INFO L87 Difference]: Start difference. First operand 269 states and 677 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:30,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:30,129 INFO L93 Difference]: Finished difference Result 435 states and 976 transitions. [2021-07-13 19:52:30,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:52:30,130 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:30,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:30,130 INFO L225 Difference]: With dead ends: 435 [2021-07-13 19:52:30,130 INFO L226 Difference]: Without dead ends: 435 [2021-07-13 19:52:30,131 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 520.4ms TimeCoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:52:30,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-07-13 19:52:30,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 261. [2021-07-13 19:52:30,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.480769230769231) internal successors, (645), 260 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:30,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 645 transitions. [2021-07-13 19:52:30,134 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 645 transitions. Word has length 19 [2021-07-13 19:52:30,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:30,134 INFO L482 AbstractCegarLoop]: Abstraction has 261 states and 645 transitions. [2021-07-13 19:52:30,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:30,134 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 645 transitions. [2021-07-13 19:52:30,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:30,134 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:30,134 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:30,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15806 [2021-07-13 19:52:30,335 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:30,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:30,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1730197719, now seen corresponding path program 571 times [2021-07-13 19:52:30,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:30,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996110532] [2021-07-13 19:52:30,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:30,391 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:30,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:30,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996110532] [2021-07-13 19:52:30,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996110532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:30,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755323304] [2021-07-13 19:52:30,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:30,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:30,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:30,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:30,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:30,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:30,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:30,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:30,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:52:30,567 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:30,608 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-07-13 19:52:30,608 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:30,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:52:30,611 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:30,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:30,625 INFO L518 ElimStorePlain]: Eliminatee v_prenex_599 vanished before elimination [2021-07-13 19:52:30,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:30,626 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:52:30,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:30,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755323304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:30,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:30,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:52:30,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280738506] [2021-07-13 19:52:30,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:52:30,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:30,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:52:30,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:52:30,700 INFO L87 Difference]: Start difference. First operand 261 states and 645 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:31,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:31,349 INFO L93 Difference]: Finished difference Result 348 states and 783 transitions. [2021-07-13 19:52:31,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:52:31,349 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:31,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:31,350 INFO L225 Difference]: With dead ends: 348 [2021-07-13 19:52:31,350 INFO L226 Difference]: Without dead ends: 344 [2021-07-13 19:52:31,350 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 636.2ms TimeCoverageRelationStatistics Valid=156, Invalid=966, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:52:31,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-07-13 19:52:31,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 259. [2021-07-13 19:52:31,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.4767441860465116) internal successors, (639), 258 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:31,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 639 transitions. [2021-07-13 19:52:31,353 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 639 transitions. Word has length 19 [2021-07-13 19:52:31,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:31,353 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 639 transitions. [2021-07-13 19:52:31,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:31,353 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 639 transitions. [2021-07-13 19:52:31,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:31,353 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:31,353 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:31,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15814,575 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:31,554 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:31,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:31,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1117202134, now seen corresponding path program 572 times [2021-07-13 19:52:31,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:31,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525484434] [2021-07-13 19:52:31,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:31,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:31,614 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:31,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:31,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525484434] [2021-07-13 19:52:31,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525484434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:31,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006797309] [2021-07-13 19:52:31,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:31,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:31,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:31,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:31,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:31,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:31,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:31,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:31,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:31,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:31,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:31,777 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:31,798 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:52:31,798 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:31,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:31,799 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:52:31,820 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:31,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006797309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:31,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:31,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:52:31,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744972590] [2021-07-13 19:52:31,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:52:31,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:31,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:52:31,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:52:31,821 INFO L87 Difference]: Start difference. First operand 259 states and 639 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:32,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:32,131 INFO L93 Difference]: Finished difference Result 349 states and 805 transitions. [2021-07-13 19:52:32,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:52:32,131 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:32,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:32,131 INFO L225 Difference]: With dead ends: 349 [2021-07-13 19:52:32,131 INFO L226 Difference]: Without dead ends: 349 [2021-07-13 19:52:32,132 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 267.4ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:52:32,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-07-13 19:52:32,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 251. [2021-07-13 19:52:32,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.444) internal successors, (611), 250 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:32,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 611 transitions. [2021-07-13 19:52:32,134 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 611 transitions. Word has length 19 [2021-07-13 19:52:32,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:32,134 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 611 transitions. [2021-07-13 19:52:32,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:32,134 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 611 transitions. [2021-07-13 19:52:32,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:32,135 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:32,135 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:32,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15828 [2021-07-13 19:52:32,335 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:32,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:32,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1489058421, now seen corresponding path program 573 times [2021-07-13 19:52:32,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:32,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902729369] [2021-07-13 19:52:32,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:32,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:32,396 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:32,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:32,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902729369] [2021-07-13 19:52:32,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902729369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:32,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115512306] [2021-07-13 19:52:32,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:32,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:52:32,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:32,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:32,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:32,680 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:52:32,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:32,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:32,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:32,684 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:32,719 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:52:32,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:52:32,722 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:32,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:32,735 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:32,735 INFO L518 ElimStorePlain]: Eliminatee v_prenex_606 vanished before elimination [2021-07-13 19:52:32,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:52:32,736 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:52:32,762 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:32,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115512306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:32,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:32,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:52:32,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841625123] [2021-07-13 19:52:32,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:52:32,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:32,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:52:32,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:52:32,763 INFO L87 Difference]: Start difference. First operand 251 states and 611 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:33,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:33,103 INFO L93 Difference]: Finished difference Result 270 states and 642 transitions. [2021-07-13 19:52:33,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:52:33,103 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:33,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:33,104 INFO L225 Difference]: With dead ends: 270 [2021-07-13 19:52:33,104 INFO L226 Difference]: Without dead ends: 262 [2021-07-13 19:52:33,104 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 406.4ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:52:33,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-07-13 19:52:33,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 248. [2021-07-13 19:52:33,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.4412955465587043) internal successors, (603), 247 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:33,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 603 transitions. [2021-07-13 19:52:33,106 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 603 transitions. Word has length 19 [2021-07-13 19:52:33,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:33,106 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 603 transitions. [2021-07-13 19:52:33,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:33,106 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 603 transitions. [2021-07-13 19:52:33,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:33,107 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:33,107 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:33,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 577 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15832 [2021-07-13 19:52:33,308 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:33,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:33,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1158756454, now seen corresponding path program 574 times [2021-07-13 19:52:33,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:33,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061750293] [2021-07-13 19:52:33,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:33,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:33,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:33,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:33,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061750293] [2021-07-13 19:52:33,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061750293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:33,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042763376] [2021-07-13 19:52:33,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:33,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:52:33,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:33,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:33,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:33,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:33,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:33,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:33,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:33,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:33,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:33,555 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:33,580 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:52:33,580 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:33,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:33,581 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:52:33,631 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:33,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042763376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:33,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:33,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:52:33,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819572035] [2021-07-13 19:52:33,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:33,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:33,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:33,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:33,632 INFO L87 Difference]: Start difference. First operand 248 states and 603 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:34,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:34,374 INFO L93 Difference]: Finished difference Result 376 states and 862 transitions. [2021-07-13 19:52:34,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:52:34,374 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:34,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:34,374 INFO L225 Difference]: With dead ends: 376 [2021-07-13 19:52:34,375 INFO L226 Difference]: Without dead ends: 370 [2021-07-13 19:52:34,375 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 731.7ms TimeCoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:52:34,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-07-13 19:52:34,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 266. [2021-07-13 19:52:34,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.5018867924528303) internal successors, (663), 265 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:34,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 663 transitions. [2021-07-13 19:52:34,378 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 663 transitions. Word has length 19 [2021-07-13 19:52:34,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:34,378 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 663 transitions. [2021-07-13 19:52:34,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:34,378 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 663 transitions. [2021-07-13 19:52:34,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:34,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:34,378 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:34,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 578 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15858 [2021-07-13 19:52:34,579 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:34,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:34,579 INFO L82 PathProgramCache]: Analyzing trace with hash 905601189, now seen corresponding path program 575 times [2021-07-13 19:52:34,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:34,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266001260] [2021-07-13 19:52:34,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:34,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:34,647 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:34,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:34,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266001260] [2021-07-13 19:52:34,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266001260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:34,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303052067] [2021-07-13 19:52:34,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:34,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:52:34,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:34,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:34,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:34,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:52:34,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:34,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:34,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:34,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:34,892 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-07-13 19:52:34,892 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:34,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:52:34,895 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:34,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:34,909 INFO L518 ElimStorePlain]: Eliminatee v_prenex_609 vanished before elimination [2021-07-13 19:52:34,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:34,910 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:52:34,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:34,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303052067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:34,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:34,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:52:34,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605222741] [2021-07-13 19:52:34,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:34,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:34,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:34,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:34,964 INFO L87 Difference]: Start difference. First operand 266 states and 663 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:35,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:35,279 INFO L93 Difference]: Finished difference Result 339 states and 789 transitions. [2021-07-13 19:52:35,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:52:35,279 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:35,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:35,280 INFO L225 Difference]: With dead ends: 339 [2021-07-13 19:52:35,280 INFO L226 Difference]: Without dead ends: 336 [2021-07-13 19:52:35,280 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 336.3ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:52:35,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-07-13 19:52:35,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 266. [2021-07-13 19:52:35,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.5018867924528303) internal successors, (663), 265 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:35,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 663 transitions. [2021-07-13 19:52:35,283 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 663 transitions. Word has length 19 [2021-07-13 19:52:35,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:35,283 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 663 transitions. [2021-07-13 19:52:35,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:35,283 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 663 transitions. [2021-07-13 19:52:35,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:35,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:35,283 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:35,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15868,579 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:35,484 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:35,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:35,484 INFO L82 PathProgramCache]: Analyzing trace with hash 458263466, now seen corresponding path program 576 times [2021-07-13 19:52:35,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:35,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163072252] [2021-07-13 19:52:35,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:35,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:35,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:35,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163072252] [2021-07-13 19:52:35,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163072252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:35,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470251377] [2021-07-13 19:52:35,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:35,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:52:35,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:35,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:35,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:35,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:35,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:35,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:35,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:35,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:35,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:35,736 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:35,763 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:52:35,763 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:35,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:35,764 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:52:35,808 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:35,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470251377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:35,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:35,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:52:35,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995197118] [2021-07-13 19:52:35,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:35,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:35,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:35,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:35,808 INFO L87 Difference]: Start difference. First operand 266 states and 663 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:36,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:36,376 INFO L93 Difference]: Finished difference Result 402 states and 911 transitions. [2021-07-13 19:52:36,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:52:36,376 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:36,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:36,377 INFO L225 Difference]: With dead ends: 402 [2021-07-13 19:52:36,377 INFO L226 Difference]: Without dead ends: 402 [2021-07-13 19:52:36,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 572.4ms TimeCoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:52:36,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-07-13 19:52:36,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 264. [2021-07-13 19:52:36,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.4904942965779466) internal successors, (655), 263 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:36,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 655 transitions. [2021-07-13 19:52:36,380 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 655 transitions. Word has length 19 [2021-07-13 19:52:36,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:36,380 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 655 transitions. [2021-07-13 19:52:36,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:36,380 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 655 transitions. [2021-07-13 19:52:36,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:36,380 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:36,380 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:36,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 580 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15879 [2021-07-13 19:52:36,581 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:36,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:36,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1524533779, now seen corresponding path program 577 times [2021-07-13 19:52:36,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:36,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450610140] [2021-07-13 19:52:36,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:36,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:36,649 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:36,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:36,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450610140] [2021-07-13 19:52:36,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450610140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:36,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606312117] [2021-07-13 19:52:36,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:36,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:36,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:36,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:36,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:36,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:36,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:36,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:36,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:52:36,857 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:36,898 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-07-13 19:52:36,898 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:36,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:52:36,901 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:36,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:36,915 INFO L518 ElimStorePlain]: Eliminatee v_prenex_612 vanished before elimination [2021-07-13 19:52:36,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:36,916 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:52:36,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:36,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606312117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:36,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:36,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:52:36,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806909976] [2021-07-13 19:52:36,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:36,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:36,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:36,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:36,991 INFO L87 Difference]: Start difference. First operand 264 states and 655 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:37,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:37,530 INFO L93 Difference]: Finished difference Result 333 states and 770 transitions. [2021-07-13 19:52:37,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:52:37,530 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:37,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:37,531 INFO L225 Difference]: With dead ends: 333 [2021-07-13 19:52:37,531 INFO L226 Difference]: Without dead ends: 329 [2021-07-13 19:52:37,531 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 513.4ms TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:52:37,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-07-13 19:52:37,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 262. [2021-07-13 19:52:37,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.4865900383141764) internal successors, (649), 261 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:37,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 649 transitions. [2021-07-13 19:52:37,535 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 649 transitions. Word has length 19 [2021-07-13 19:52:37,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:37,535 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 649 transitions. [2021-07-13 19:52:37,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:37,535 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 649 transitions. [2021-07-13 19:52:37,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:37,536 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:37,536 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:37,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15887,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:37,758 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:37,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:37,758 INFO L82 PathProgramCache]: Analyzing trace with hash -76966336, now seen corresponding path program 578 times [2021-07-13 19:52:37,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:37,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095857207] [2021-07-13 19:52:37,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:37,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:37,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:37,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095857207] [2021-07-13 19:52:37,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095857207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:37,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061775311] [2021-07-13 19:52:37,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:37,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:37,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:37,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:37,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:38,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:38,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:38,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:38,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:38,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:38,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:38,009 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:38,030 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:52:38,030 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:38,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:38,031 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:52:38,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:38,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061775311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:38,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:38,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:52:38,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912303097] [2021-07-13 19:52:38,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:38,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:38,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:38,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:38,054 INFO L87 Difference]: Start difference. First operand 262 states and 649 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:38,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:38,466 INFO L93 Difference]: Finished difference Result 347 states and 809 transitions. [2021-07-13 19:52:38,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:52:38,466 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:38,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:38,467 INFO L225 Difference]: With dead ends: 347 [2021-07-13 19:52:38,467 INFO L226 Difference]: Without dead ends: 347 [2021-07-13 19:52:38,467 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 388.2ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:52:38,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-07-13 19:52:38,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 258. [2021-07-13 19:52:38,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.470817120622568) internal successors, (635), 257 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:38,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 635 transitions. [2021-07-13 19:52:38,471 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 635 transitions. Word has length 19 [2021-07-13 19:52:38,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:38,471 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 635 transitions. [2021-07-13 19:52:38,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:38,471 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 635 transitions. [2021-07-13 19:52:38,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:38,472 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:38,472 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:38,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15907,582 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:38,677 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:38,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:38,677 INFO L82 PathProgramCache]: Analyzing trace with hash -448822623, now seen corresponding path program 579 times [2021-07-13 19:52:38,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:38,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411263523] [2021-07-13 19:52:38,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:38,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:38,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:38,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411263523] [2021-07-13 19:52:38,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411263523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:38,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434246224] [2021-07-13 19:52:38,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:38,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:52:38,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:38,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:38,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:39,059 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:52:39,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:39,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:39,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:39,064 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:39,098 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:52:39,098 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:39,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:52:39,101 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:39,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:39,114 INFO L518 ElimStorePlain]: Eliminatee v_prenex_618 vanished before elimination [2021-07-13 19:52:39,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:52:39,115 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:52:39,143 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:39,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434246224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:39,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:39,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:52:39,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760194855] [2021-07-13 19:52:39,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:39,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:39,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:39,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:39,144 INFO L87 Difference]: Start difference. First operand 258 states and 635 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:39,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:39,499 INFO L93 Difference]: Finished difference Result 285 states and 679 transitions. [2021-07-13 19:52:39,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:52:39,499 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:39,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:39,500 INFO L225 Difference]: With dead ends: 285 [2021-07-13 19:52:39,500 INFO L226 Difference]: Without dead ends: 277 [2021-07-13 19:52:39,500 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 370.8ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:52:39,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-07-13 19:52:39,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 256. [2021-07-13 19:52:39,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.466666666666667) internal successors, (629), 255 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:39,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 629 transitions. [2021-07-13 19:52:39,502 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 629 transitions. Word has length 19 [2021-07-13 19:52:39,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:39,502 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 629 transitions. [2021-07-13 19:52:39,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:39,502 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 629 transitions. [2021-07-13 19:52:39,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:39,503 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:39,503 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:39,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15911 [2021-07-13 19:52:39,703 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:39,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:39,704 INFO L82 PathProgramCache]: Analyzing trace with hash 510778986, now seen corresponding path program 580 times [2021-07-13 19:52:39,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:39,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560950384] [2021-07-13 19:52:39,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:39,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:39,774 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:39,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:39,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560950384] [2021-07-13 19:52:39,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560950384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:39,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784356116] [2021-07-13 19:52:39,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:39,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:52:39,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:39,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:39,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:39,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:39,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:39,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:39,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:39,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:39,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:39,955 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:39,976 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:52:39,976 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:39,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:39,977 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:52:39,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:39,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784356116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:39,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:39,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:52:39,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503760020] [2021-07-13 19:52:39,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:39,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:40,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:40,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:40,000 INFO L87 Difference]: Start difference. First operand 256 states and 629 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:40,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:40,265 INFO L93 Difference]: Finished difference Result 315 states and 738 transitions. [2021-07-13 19:52:40,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:52:40,266 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:40,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:40,266 INFO L225 Difference]: With dead ends: 315 [2021-07-13 19:52:40,266 INFO L226 Difference]: Without dead ends: 315 [2021-07-13 19:52:40,266 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 220.8ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:52:40,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-07-13 19:52:40,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 252. [2021-07-13 19:52:40,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.450199203187251) internal successors, (615), 251 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:40,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 615 transitions. [2021-07-13 19:52:40,269 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 615 transitions. Word has length 19 [2021-07-13 19:52:40,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:40,269 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 615 transitions. [2021-07-13 19:52:40,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:40,269 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 615 transitions. [2021-07-13 19:52:40,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:40,269 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:40,269 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:40,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15927,584 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:40,470 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:40,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:40,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1461515155, now seen corresponding path program 581 times [2021-07-13 19:52:40,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:40,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747652670] [2021-07-13 19:52:40,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:40,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:40,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:40,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:40,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747652670] [2021-07-13 19:52:40,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747652670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:40,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224268122] [2021-07-13 19:52:40,540 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:40,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:52:40,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:40,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:40,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:40,867 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:52:40,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:40,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:40,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:40,871 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:40,905 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:52:40,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:52:40,908 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:40,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:40,921 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:40,921 INFO L518 ElimStorePlain]: Eliminatee v_prenex_623 vanished before elimination [2021-07-13 19:52:40,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:52:40,922 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:52:40,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:40,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224268122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:40,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:40,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:52:40,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475653134] [2021-07-13 19:52:40,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:40,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:40,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:40,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:40,951 INFO L87 Difference]: Start difference. First operand 252 states and 615 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:41,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:41,242 INFO L93 Difference]: Finished difference Result 274 states and 650 transitions. [2021-07-13 19:52:41,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:52:41,242 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:41,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:41,242 INFO L225 Difference]: With dead ends: 274 [2021-07-13 19:52:41,243 INFO L226 Difference]: Without dead ends: 262 [2021-07-13 19:52:41,243 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 330.1ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:52:41,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-07-13 19:52:41,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 251. [2021-07-13 19:52:41,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.444) internal successors, (611), 250 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:41,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 611 transitions. [2021-07-13 19:52:41,245 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 611 transitions. Word has length 19 [2021-07-13 19:52:41,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:41,245 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 611 transitions. [2021-07-13 19:52:41,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:41,245 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 611 transitions. [2021-07-13 19:52:41,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:41,246 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:41,246 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:41,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15931 [2021-07-13 19:52:41,446 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:41,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:41,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1182927888, now seen corresponding path program 582 times [2021-07-13 19:52:41,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:41,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818121369] [2021-07-13 19:52:41,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:41,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:41,523 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:41,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:41,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818121369] [2021-07-13 19:52:41,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818121369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:41,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315369863] [2021-07-13 19:52:41,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:41,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:52:41,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:41,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:41,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:41,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:41,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:41,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:41,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:41,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:52:41,718 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:41,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:52:41,721 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:41,755 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-07-13 19:52:41,755 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:41,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:52:41,756 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-07-13 19:52:41,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:41,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315369863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:41,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:41,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:52:41,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825143994] [2021-07-13 19:52:41,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:41,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:41,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:41,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:41,784 INFO L87 Difference]: Start difference. First operand 251 states and 611 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:41,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:41,989 INFO L93 Difference]: Finished difference Result 285 states and 669 transitions. [2021-07-13 19:52:41,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:52:41,989 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:41,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:41,989 INFO L225 Difference]: With dead ends: 285 [2021-07-13 19:52:41,989 INFO L226 Difference]: Without dead ends: 267 [2021-07-13 19:52:41,989 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 257.7ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:52:41,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-07-13 19:52:41,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 252. [2021-07-13 19:52:41,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.442231075697211) internal successors, (613), 251 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:41,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 613 transitions. [2021-07-13 19:52:41,992 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 613 transitions. Word has length 19 [2021-07-13 19:52:41,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:41,992 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 613 transitions. [2021-07-13 19:52:41,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:41,992 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 613 transitions. [2021-07-13 19:52:41,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:41,992 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:41,992 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:42,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15947,586 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:42,193 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:42,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:42,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1581113201, now seen corresponding path program 583 times [2021-07-13 19:52:42,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:42,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109240234] [2021-07-13 19:52:42,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:42,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:42,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:42,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:42,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109240234] [2021-07-13 19:52:42,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109240234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:42,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731164930] [2021-07-13 19:52:42,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:42,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:42,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:42,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:42,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:42,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:42,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:42,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:42,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:42,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:42,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:42,445 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-07-13 19:52:42,445 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:42,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:42,446 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-07-13 19:52:42,466 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:42,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731164930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:42,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:42,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:52:42,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380780298] [2021-07-13 19:52:42,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:42,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:42,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:42,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:42,467 INFO L87 Difference]: Start difference. First operand 252 states and 613 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:42,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:42,741 INFO L93 Difference]: Finished difference Result 328 states and 765 transitions. [2021-07-13 19:52:42,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:52:42,741 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:42,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:42,741 INFO L225 Difference]: With dead ends: 328 [2021-07-13 19:52:42,742 INFO L226 Difference]: Without dead ends: 328 [2021-07-13 19:52:42,742 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 264.1ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:52:42,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-07-13 19:52:42,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 252. [2021-07-13 19:52:42,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.442231075697211) internal successors, (613), 251 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:42,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 613 transitions. [2021-07-13 19:52:42,744 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 613 transitions. Word has length 19 [2021-07-13 19:52:42,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:42,744 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 613 transitions. [2021-07-13 19:52:42,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:42,744 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 613 transitions. [2021-07-13 19:52:42,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:42,745 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:42,745 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:42,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15960,587 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:42,945 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:42,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:42,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1975935404, now seen corresponding path program 584 times [2021-07-13 19:52:42,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:42,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810390637] [2021-07-13 19:52:42,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:42,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:43,015 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:43,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:43,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810390637] [2021-07-13 19:52:43,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810390637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:43,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441146790] [2021-07-13 19:52:43,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:43,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:43,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:43,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:43,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:43,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:52:43,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:43,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:43,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:43,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:43,207 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:43,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:52:43,210 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:43,245 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-07-13 19:52:43,245 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:43,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:52:43,246 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-07-13 19:52:43,272 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:43,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441146790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:43,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:43,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:52:43,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965075714] [2021-07-13 19:52:43,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:43,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:43,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:43,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:43,273 INFO L87 Difference]: Start difference. First operand 252 states and 613 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:43,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:43,570 INFO L93 Difference]: Finished difference Result 284 states and 669 transitions. [2021-07-13 19:52:43,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:52:43,571 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:43,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:43,571 INFO L225 Difference]: With dead ends: 284 [2021-07-13 19:52:43,571 INFO L226 Difference]: Without dead ends: 272 [2021-07-13 19:52:43,571 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 342.9ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:52:43,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-07-13 19:52:43,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 252. [2021-07-13 19:52:43,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.442231075697211) internal successors, (613), 251 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:43,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 613 transitions. [2021-07-13 19:52:43,574 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 613 transitions. Word has length 19 [2021-07-13 19:52:43,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:43,574 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 613 transitions. [2021-07-13 19:52:43,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:43,574 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 613 transitions. [2021-07-13 19:52:43,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:43,574 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:43,574 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:43,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 588 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15964 [2021-07-13 19:52:43,775 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:43,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:43,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1233814027, now seen corresponding path program 585 times [2021-07-13 19:52:43,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:43,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619472745] [2021-07-13 19:52:43,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:43,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:43,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:43,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:43,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619472745] [2021-07-13 19:52:43,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619472745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:43,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718705776] [2021-07-13 19:52:43,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:43,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:52:43,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:43,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:43,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:43,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:43,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:43,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:43,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:44,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:44,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:44,001 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:44,021 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-07-13 19:52:44,021 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:44,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:44,022 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-07-13 19:52:44,042 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:44,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718705776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:44,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:44,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:52:44,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519580410] [2021-07-13 19:52:44,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:44,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:44,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:44,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:44,043 INFO L87 Difference]: Start difference. First operand 252 states and 613 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:44,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:44,485 INFO L93 Difference]: Finished difference Result 404 states and 917 transitions. [2021-07-13 19:52:44,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:52:44,486 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:44,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:44,486 INFO L225 Difference]: With dead ends: 404 [2021-07-13 19:52:44,486 INFO L226 Difference]: Without dead ends: 404 [2021-07-13 19:52:44,486 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 409.4ms TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:52:44,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-07-13 19:52:44,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 253. [2021-07-13 19:52:44,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.4404761904761907) internal successors, (615), 252 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:44,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 615 transitions. [2021-07-13 19:52:44,489 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 615 transitions. Word has length 19 [2021-07-13 19:52:44,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:44,489 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 615 transitions. [2021-07-13 19:52:44,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:44,489 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 615 transitions. [2021-07-13 19:52:44,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:44,490 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:44,490 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:44,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 589 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15977 [2021-07-13 19:52:44,690 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:44,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:44,690 INFO L82 PathProgramCache]: Analyzing trace with hash 2078585744, now seen corresponding path program 586 times [2021-07-13 19:52:44,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:44,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709500817] [2021-07-13 19:52:44,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:44,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:44,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:44,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709500817] [2021-07-13 19:52:44,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709500817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:44,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822072231] [2021-07-13 19:52:44,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:44,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:52:44,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:44,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:44,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:44,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:44,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:44,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:44,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:44,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:44,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:44,942 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:44,971 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:52:44,971 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:44,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:44,972 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:52:45,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:45,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822072231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:45,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:45,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:52:45,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903864173] [2021-07-13 19:52:45,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:45,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:45,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:45,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:45,023 INFO L87 Difference]: Start difference. First operand 253 states and 615 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:45,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:45,707 INFO L93 Difference]: Finished difference Result 333 states and 757 transitions. [2021-07-13 19:52:45,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:52:45,707 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:45,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:45,708 INFO L225 Difference]: With dead ends: 333 [2021-07-13 19:52:45,708 INFO L226 Difference]: Without dead ends: 327 [2021-07-13 19:52:45,708 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 677.3ms TimeCoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:52:45,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-07-13 19:52:45,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 255. [2021-07-13 19:52:45,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.4488188976377954) internal successors, (622), 254 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:45,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 622 transitions. [2021-07-13 19:52:45,711 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 622 transitions. Word has length 19 [2021-07-13 19:52:45,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:45,711 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 622 transitions. [2021-07-13 19:52:45,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:45,711 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 622 transitions. [2021-07-13 19:52:45,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:45,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:45,711 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:45,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 590 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15981 [2021-07-13 19:52:45,912 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:45,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:45,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1825430479, now seen corresponding path program 587 times [2021-07-13 19:52:45,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:45,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992083934] [2021-07-13 19:52:45,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:45,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:45,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:45,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:45,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992083934] [2021-07-13 19:52:45,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992083934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:45,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225233182] [2021-07-13 19:52:45,980 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:46,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:52:46,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:46,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:46,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:46,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:46,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:46,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:46,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:46,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:52:46,128 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:46,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:52:46,131 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:46,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:46,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:46,134 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:46,172 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-07-13 19:52:46,172 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:46,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:46,173 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:52:46,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:46,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225233182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:46,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:46,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:52:46,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765454575] [2021-07-13 19:52:46,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:46,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:46,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:46,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:46,218 INFO L87 Difference]: Start difference. First operand 255 states and 622 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:46,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:46,951 INFO L93 Difference]: Finished difference Result 463 states and 1023 transitions. [2021-07-13 19:52:46,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:52:46,952 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:46,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:46,952 INFO L225 Difference]: With dead ends: 463 [2021-07-13 19:52:46,952 INFO L226 Difference]: Without dead ends: 463 [2021-07-13 19:52:46,952 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 683.8ms TimeCoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:52:46,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-07-13 19:52:46,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 255. [2021-07-13 19:52:46,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.4488188976377954) internal successors, (622), 254 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:46,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 622 transitions. [2021-07-13 19:52:46,955 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 622 transitions. Word has length 19 [2021-07-13 19:52:46,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:46,955 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 622 transitions. [2021-07-13 19:52:46,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:46,956 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 622 transitions. [2021-07-13 19:52:46,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:46,956 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:46,956 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:47,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 591 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15999 [2021-07-13 19:52:47,156 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:47,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:47,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1378092756, now seen corresponding path program 588 times [2021-07-13 19:52:47,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:47,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657484819] [2021-07-13 19:52:47,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:47,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:47,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:47,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:47,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657484819] [2021-07-13 19:52:47,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657484819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:47,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278206909] [2021-07-13 19:52:47,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:47,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:52:47,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:47,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:47,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:47,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:47,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:47,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:47,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:47,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:47,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:47,408 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:47,436 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:52:47,437 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:47,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:47,437 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:52:47,480 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:47,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278206909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:47,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:47,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:52:47,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709708102] [2021-07-13 19:52:47,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:47,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:47,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:47,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:47,481 INFO L87 Difference]: Start difference. First operand 255 states and 622 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:47,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:47,902 INFO L93 Difference]: Finished difference Result 303 states and 715 transitions. [2021-07-13 19:52:47,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:52:47,903 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:47,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:47,903 INFO L225 Difference]: With dead ends: 303 [2021-07-13 19:52:47,903 INFO L226 Difference]: Without dead ends: 303 [2021-07-13 19:52:47,903 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 433.0ms TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:52:47,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-07-13 19:52:47,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 254. [2021-07-13 19:52:47,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.4426877470355732) internal successors, (618), 253 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:47,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 618 transitions. [2021-07-13 19:52:47,906 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 618 transitions. Word has length 19 [2021-07-13 19:52:47,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:47,906 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 618 transitions. [2021-07-13 19:52:47,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:47,906 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 618 transitions. [2021-07-13 19:52:47,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:47,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:47,906 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:48,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16009,592 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:48,107 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:48,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:48,107 INFO L82 PathProgramCache]: Analyzing trace with hash -604704489, now seen corresponding path program 589 times [2021-07-13 19:52:48,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:48,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788491677] [2021-07-13 19:52:48,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:48,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:48,175 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:48,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:48,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788491677] [2021-07-13 19:52:48,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788491677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:48,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663362857] [2021-07-13 19:52:48,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:48,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:48,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:48,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:48,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:48,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:48,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:48,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:48,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:52:48,323 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:48,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:48,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:48,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:48,326 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:48,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:52:48,329 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:48,363 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-07-13 19:52:48,363 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:48,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:48,364 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:52:48,429 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:48,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663362857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:48,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:48,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:52:48,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124912784] [2021-07-13 19:52:48,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:52:48,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:48,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:52:48,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:48,430 INFO L87 Difference]: Start difference. First operand 254 states and 618 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:49,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:49,377 INFO L93 Difference]: Finished difference Result 392 states and 889 transitions. [2021-07-13 19:52:49,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:52:49,378 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:49,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:49,378 INFO L225 Difference]: With dead ends: 392 [2021-07-13 19:52:49,378 INFO L226 Difference]: Without dead ends: 388 [2021-07-13 19:52:49,379 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 913.7ms TimeCoverageRelationStatistics Valid=227, Invalid=1579, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:52:49,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-07-13 19:52:49,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 245. [2021-07-13 19:52:49,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.4549180327868854) internal successors, (599), 244 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:49,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 599 transitions. [2021-07-13 19:52:49,381 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 599 transitions. Word has length 19 [2021-07-13 19:52:49,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:49,381 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 599 transitions. [2021-07-13 19:52:49,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:49,382 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 599 transitions. [2021-07-13 19:52:49,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:49,382 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:49,382 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:49,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 593 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16025 [2021-07-13 19:52:49,583 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:49,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:49,583 INFO L82 PathProgramCache]: Analyzing trace with hash 928182347, now seen corresponding path program 590 times [2021-07-13 19:52:49,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:49,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977218075] [2021-07-13 19:52:49,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:49,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:49,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:49,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:49,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977218075] [2021-07-13 19:52:49,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977218075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:49,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287656192] [2021-07-13 19:52:49,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:49,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:49,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:49,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:49,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:49,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:49,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:49,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:49,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:49,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:49,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:49,791 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:49,812 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-07-13 19:52:49,812 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:49,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:49,813 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-07-13 19:52:49,832 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:49,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287656192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:49,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:49,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:52:49,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072217780] [2021-07-13 19:52:49,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:52:49,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:49,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:52:49,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:52:49,833 INFO L87 Difference]: Start difference. First operand 245 states and 599 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:50,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:50,127 INFO L93 Difference]: Finished difference Result 371 states and 827 transitions. [2021-07-13 19:52:50,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:52:50,127 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:50,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:50,128 INFO L225 Difference]: With dead ends: 371 [2021-07-13 19:52:50,128 INFO L226 Difference]: Without dead ends: 371 [2021-07-13 19:52:50,128 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 224.4ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:52:50,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-07-13 19:52:50,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 247. [2021-07-13 19:52:50,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.459349593495935) internal successors, (605), 246 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:50,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 605 transitions. [2021-07-13 19:52:50,131 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 605 transitions. Word has length 19 [2021-07-13 19:52:50,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:50,131 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 605 transitions. [2021-07-13 19:52:50,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:50,131 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 605 transitions. [2021-07-13 19:52:50,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:50,131 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:50,132 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:50,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 594 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16038 [2021-07-13 19:52:50,332 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:50,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:50,332 INFO L82 PathProgramCache]: Analyzing trace with hash -54385178, now seen corresponding path program 591 times [2021-07-13 19:52:50,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:50,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233347398] [2021-07-13 19:52:50,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:50,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:50,402 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:50,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:50,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233347398] [2021-07-13 19:52:50,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233347398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:50,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725515725] [2021-07-13 19:52:50,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:50,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:52:50,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:50,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:50,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:50,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:50,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:50,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:50,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:50,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:50,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:50,577 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:50,606 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:52:50,606 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:50,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:50,607 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:52:50,656 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:50,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725515725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:50,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:50,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:52:50,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340684566] [2021-07-13 19:52:50,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:52:50,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:50,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:52:50,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:52:50,657 INFO L87 Difference]: Start difference. First operand 247 states and 605 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:51,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:51,227 INFO L93 Difference]: Finished difference Result 367 states and 804 transitions. [2021-07-13 19:52:51,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:52:51,227 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:51,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:51,228 INFO L225 Difference]: With dead ends: 367 [2021-07-13 19:52:51,228 INFO L226 Difference]: Without dead ends: 361 [2021-07-13 19:52:51,228 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 515.5ms TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:52:51,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-07-13 19:52:51,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 249. [2021-07-13 19:52:51,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.467741935483871) internal successors, (612), 248 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:51,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 612 transitions. [2021-07-13 19:52:51,232 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 612 transitions. Word has length 19 [2021-07-13 19:52:51,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:51,232 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 612 transitions. [2021-07-13 19:52:51,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:51,232 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 612 transitions. [2021-07-13 19:52:51,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:51,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:51,233 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:51,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 595 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16042 [2021-07-13 19:52:51,453 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:51,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:51,453 INFO L82 PathProgramCache]: Analyzing trace with hash -307540443, now seen corresponding path program 592 times [2021-07-13 19:52:51,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:51,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933804451] [2021-07-13 19:52:51,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:51,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:51,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:51,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:51,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933804451] [2021-07-13 19:52:51,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933804451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:51,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833250857] [2021-07-13 19:52:51,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:51,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:52:51,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:51,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:51,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:51,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:52:51,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:51,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:52:51,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:51,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:51,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:51,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:51,656 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:51,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:51,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:51,658 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:51,693 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-07-13 19:52:51,693 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:51,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:51,694 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:52:51,735 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:51,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833250857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:51,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:51,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:52:51,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918690497] [2021-07-13 19:52:51,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:52:51,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:51,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:52:51,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:52:51,736 INFO L87 Difference]: Start difference. First operand 249 states and 612 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:51,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:51,974 INFO L93 Difference]: Finished difference Result 420 states and 920 transitions. [2021-07-13 19:52:51,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:52:51,975 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:51,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:51,975 INFO L225 Difference]: With dead ends: 420 [2021-07-13 19:52:51,975 INFO L226 Difference]: Without dead ends: 420 [2021-07-13 19:52:51,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 196.3ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:52:51,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-07-13 19:52:51,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 249. [2021-07-13 19:52:51,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.467741935483871) internal successors, (612), 248 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:51,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 612 transitions. [2021-07-13 19:52:51,978 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 612 transitions. Word has length 19 [2021-07-13 19:52:51,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:51,978 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 612 transitions. [2021-07-13 19:52:51,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:51,978 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 612 transitions. [2021-07-13 19:52:51,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:51,979 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:51,979 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:52,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16060,596 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:52,179 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:52,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:52,180 INFO L82 PathProgramCache]: Analyzing trace with hash -754878166, now seen corresponding path program 593 times [2021-07-13 19:52:52,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:52,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724819672] [2021-07-13 19:52:52,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:52,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:52,238 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:52,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:52,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724819672] [2021-07-13 19:52:52,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724819672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:52,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901789349] [2021-07-13 19:52:52,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:52,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:52:52,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:52,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:52,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:52,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:52,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:52,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:52,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:52,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:52,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:52,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:52,441 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:52:52,441 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:52,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:52,442 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:52:52,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:52,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901789349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:52,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:52,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:52:52,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869499698] [2021-07-13 19:52:52,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:52:52,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:52,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:52:52,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:52:52,484 INFO L87 Difference]: Start difference. First operand 249 states and 612 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:52,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:52,794 INFO L93 Difference]: Finished difference Result 337 states and 762 transitions. [2021-07-13 19:52:52,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:52:52,794 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:52,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:52,794 INFO L225 Difference]: With dead ends: 337 [2021-07-13 19:52:52,795 INFO L226 Difference]: Without dead ends: 337 [2021-07-13 19:52:52,795 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 311.2ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:52:52,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-07-13 19:52:52,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 248. [2021-07-13 19:52:52,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.4615384615384617) internal successors, (608), 247 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:52,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 608 transitions. [2021-07-13 19:52:52,797 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 608 transitions. Word has length 19 [2021-07-13 19:52:52,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:52,798 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 608 transitions. [2021-07-13 19:52:52,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:52,798 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 608 transitions. [2021-07-13 19:52:52,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:52,798 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:52,798 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:52,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16069 [2021-07-13 19:52:52,998 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:52,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:52,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1557291885, now seen corresponding path program 594 times [2021-07-13 19:52:52,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:52,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035883347] [2021-07-13 19:52:52,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:53,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:53,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:53,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:53,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035883347] [2021-07-13 19:52:53,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035883347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:53,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217769439] [2021-07-13 19:52:53,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:53,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:52:53,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:53,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:53,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:53,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:52:53,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:53,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:53,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:53,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:53,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:53,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:53,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:53,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:53,202 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:53,204 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:52:53,204 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:53,236 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-07-13 19:52:53,236 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:53,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:53,237 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:52:53,299 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:53,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217769439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:53,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:53,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:52:53,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954316819] [2021-07-13 19:52:53,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:52:53,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:53,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:52:53,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:52:53,300 INFO L87 Difference]: Start difference. First operand 248 states and 608 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:53,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:53,748 INFO L93 Difference]: Finished difference Result 420 states and 904 transitions. [2021-07-13 19:52:53,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:52:53,748 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:53,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:53,748 INFO L225 Difference]: With dead ends: 420 [2021-07-13 19:52:53,749 INFO L226 Difference]: Without dead ends: 416 [2021-07-13 19:52:53,749 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 386.5ms TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:52:53,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-07-13 19:52:53,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 246. [2021-07-13 19:52:53,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.4612244897959186) internal successors, (603), 245 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:53,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 603 transitions. [2021-07-13 19:52:53,752 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 603 transitions. Word has length 19 [2021-07-13 19:52:53,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:53,752 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 603 transitions. [2021-07-13 19:52:53,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:53,752 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 603 transitions. [2021-07-13 19:52:53,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:53,752 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:53,752 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:53,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16085,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:53,953 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:53,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:53,953 INFO L82 PathProgramCache]: Analyzing trace with hash 533360144, now seen corresponding path program 595 times [2021-07-13 19:52:53,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:53,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367102129] [2021-07-13 19:52:53,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:53,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:54,011 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:54,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:54,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367102129] [2021-07-13 19:52:54,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367102129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:54,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529016382] [2021-07-13 19:52:54,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:54,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:54,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:54,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:54,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:54,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:54,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:54,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:54,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:54,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:54,176 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:54,201 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:52:54,202 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:54,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:54,202 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:52:54,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:54,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529016382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:54,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:54,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:52:54,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28401910] [2021-07-13 19:52:54,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:52:54,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:54,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:52:54,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:52:54,252 INFO L87 Difference]: Start difference. First operand 246 states and 603 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:56,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:56,078 INFO L93 Difference]: Finished difference Result 638 states and 1284 transitions. [2021-07-13 19:52:56,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 19:52:56,079 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:56,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:56,079 INFO L225 Difference]: With dead ends: 638 [2021-07-13 19:52:56,080 INFO L226 Difference]: Without dead ends: 632 [2021-07-13 19:52:56,080 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1476 ImplicationChecksByTransitivity, 1622.8ms TimeCoverageRelationStatistics Valid=546, Invalid=4010, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 19:52:56,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-07-13 19:52:56,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 264. [2021-07-13 19:52:56,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.547528517110266) internal successors, (670), 263 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:56,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 670 transitions. [2021-07-13 19:52:56,083 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 670 transitions. Word has length 19 [2021-07-13 19:52:56,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:56,084 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 670 transitions. [2021-07-13 19:52:56,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:56,084 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 670 transitions. [2021-07-13 19:52:56,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:56,084 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:56,084 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:56,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 599 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16098 [2021-07-13 19:52:56,285 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:56,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:56,285 INFO L82 PathProgramCache]: Analyzing trace with hash 280204879, now seen corresponding path program 596 times [2021-07-13 19:52:56,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:56,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262644067] [2021-07-13 19:52:56,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:56,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:56,343 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:56,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:56,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262644067] [2021-07-13 19:52:56,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262644067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:56,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741612315] [2021-07-13 19:52:56,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:56,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:56,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:56,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:56,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:56,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:56,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:56,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:56,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:56,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:52:56,521 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:56,562 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-07-13 19:52:56,562 INFO L518 ElimStorePlain]: Eliminatee v_prenex_626 vanished before elimination [2021-07-13 19:52:56,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:52:56,565 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:56,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:56,579 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:56,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:56,580 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:52:56,631 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:56,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741612315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:56,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:56,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:52:56,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248685604] [2021-07-13 19:52:56,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:52:56,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:56,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:52:56,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:52:56,632 INFO L87 Difference]: Start difference. First operand 264 states and 670 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:56,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:56,985 INFO L93 Difference]: Finished difference Result 389 states and 875 transitions. [2021-07-13 19:52:56,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:52:56,985 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:56,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:56,986 INFO L225 Difference]: With dead ends: 389 [2021-07-13 19:52:56,986 INFO L226 Difference]: Without dead ends: 383 [2021-07-13 19:52:56,986 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 327.0ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:52:56,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-07-13 19:52:56,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 264. [2021-07-13 19:52:56,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.547528517110266) internal successors, (670), 263 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:56,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 670 transitions. [2021-07-13 19:52:56,989 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 670 transitions. Word has length 19 [2021-07-13 19:52:56,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:56,989 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 670 transitions. [2021-07-13 19:52:56,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:56,989 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 670 transitions. [2021-07-13 19:52:56,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:56,989 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:56,989 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:57,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16108,600 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:57,190 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:57,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:57,190 INFO L82 PathProgramCache]: Analyzing trace with hash -167132844, now seen corresponding path program 597 times [2021-07-13 19:52:57,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:57,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837627802] [2021-07-13 19:52:57,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:57,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:57,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:57,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:57,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837627802] [2021-07-13 19:52:57,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837627802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:57,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194105082] [2021-07-13 19:52:57,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:57,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:52:57,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:57,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:57,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:57,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:57,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:57,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:57,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:57,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:57,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:57,411 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:57,436 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:52:57,436 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:57,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:57,437 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:52:57,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:57,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194105082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:57,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:57,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:52:57,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674202194] [2021-07-13 19:52:57,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:52:57,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:57,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:52:57,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:52:57,479 INFO L87 Difference]: Start difference. First operand 264 states and 670 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:58,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:58,352 INFO L93 Difference]: Finished difference Result 512 states and 1095 transitions. [2021-07-13 19:52:58,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:52:58,352 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:58,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:58,353 INFO L225 Difference]: With dead ends: 512 [2021-07-13 19:52:58,353 INFO L226 Difference]: Without dead ends: 512 [2021-07-13 19:52:58,353 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 769.9ms TimeCoverageRelationStatistics Valid=233, Invalid=1407, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:52:58,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-07-13 19:52:58,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 258. [2021-07-13 19:52:58,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.5136186770428015) internal successors, (646), 257 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:58,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 646 transitions. [2021-07-13 19:52:58,356 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 646 transitions. Word has length 19 [2021-07-13 19:52:58,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:58,356 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 646 transitions. [2021-07-13 19:52:58,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:58,356 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 646 transitions. [2021-07-13 19:52:58,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:58,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:58,357 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:58,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16119,601 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:58,557 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:58,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:58,557 INFO L82 PathProgramCache]: Analyzing trace with hash 2145037207, now seen corresponding path program 598 times [2021-07-13 19:52:58,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:58,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3665547] [2021-07-13 19:52:58,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:58,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:58,615 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:58,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:58,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3665547] [2021-07-13 19:52:58,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3665547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:58,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737336863] [2021-07-13 19:52:58,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:58,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:52:58,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:58,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:58,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:58,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:58,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:58,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:58,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:58,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:52:58,787 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:58,827 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-07-13 19:52:58,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:52:58,830 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:58,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:58,844 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:58,844 INFO L518 ElimStorePlain]: Eliminatee v_prenex_629 vanished before elimination [2021-07-13 19:52:58,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:52:58,845 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:52:58,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:58,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737336863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:58,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:58,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:52:58,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617156351] [2021-07-13 19:52:58,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:52:58,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:58,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:52:58,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:52:58,916 INFO L87 Difference]: Start difference. First operand 258 states and 646 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:59,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:59,527 INFO L93 Difference]: Finished difference Result 411 states and 891 transitions. [2021-07-13 19:52:59,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:52:59,527 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:52:59,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:59,528 INFO L225 Difference]: With dead ends: 411 [2021-07-13 19:52:59,528 INFO L226 Difference]: Without dead ends: 407 [2021-07-13 19:52:59,528 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 583.1ms TimeCoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:52:59,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-07-13 19:52:59,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 257. [2021-07-13 19:52:59,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.51171875) internal successors, (643), 256 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:59,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 643 transitions. [2021-07-13 19:52:59,531 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 643 transitions. Word has length 19 [2021-07-13 19:52:59,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:59,531 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 643 transitions. [2021-07-13 19:52:59,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:59,531 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 643 transitions. [2021-07-13 19:52:59,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:52:59,531 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:59,531 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:59,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16127,602 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:59,732 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:59,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:59,732 INFO L82 PathProgramCache]: Analyzing trace with hash -702362646, now seen corresponding path program 599 times [2021-07-13 19:52:59,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:59,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932662107] [2021-07-13 19:52:59,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:59,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:59,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932662107] [2021-07-13 19:52:59,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932662107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:59,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211016177] [2021-07-13 19:52:59,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:59,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:52:59,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:59,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:59,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:59,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:59,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:59,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:52:59,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:59,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:59,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:52:59,957 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:59,978 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:52:59,978 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:52:59,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:59,979 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:53:00,000 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:00,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211016177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:00,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:00,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:53:00,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451271936] [2021-07-13 19:53:00,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:00,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:00,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:00,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:00,001 INFO L87 Difference]: Start difference. First operand 257 states and 643 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:00,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:00,417 INFO L93 Difference]: Finished difference Result 417 states and 924 transitions. [2021-07-13 19:53:00,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:53:00,417 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:00,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:00,418 INFO L225 Difference]: With dead ends: 417 [2021-07-13 19:53:00,418 INFO L226 Difference]: Without dead ends: 417 [2021-07-13 19:53:00,418 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 390.1ms TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:53:00,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-07-13 19:53:00,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 254. [2021-07-13 19:53:00,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.4822134387351777) internal successors, (628), 253 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:00,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 628 transitions. [2021-07-13 19:53:00,421 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 628 transitions. Word has length 19 [2021-07-13 19:53:00,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:00,421 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 628 transitions. [2021-07-13 19:53:00,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:00,421 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 628 transitions. [2021-07-13 19:53:00,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:00,422 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:00,422 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:00,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 603 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16141 [2021-07-13 19:53:00,622 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:00,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:00,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1074218933, now seen corresponding path program 600 times [2021-07-13 19:53:00,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:00,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694912041] [2021-07-13 19:53:00,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:00,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:00,682 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:53:00,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:00,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694912041] [2021-07-13 19:53:00,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694912041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:00,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406116126] [2021-07-13 19:53:00,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:00,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:53:00,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:00,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:00,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:00,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:00,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:00,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:00,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:00,922 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:53:00,922 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:00,956 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:53:00,957 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:00,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:53:00,959 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:00,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:00,972 INFO L518 ElimStorePlain]: Eliminatee v_prenex_634 vanished before elimination [2021-07-13 19:53:00,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:53:00,973 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:53:00,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:00,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406116126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:00,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:00,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 19:53:00,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610685119] [2021-07-13 19:53:00,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:01,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:01,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:01,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:01,000 INFO L87 Difference]: Start difference. First operand 254 states and 628 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:01,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:01,480 INFO L93 Difference]: Finished difference Result 325 states and 743 transitions. [2021-07-13 19:53:01,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:53:01,480 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:01,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:01,481 INFO L225 Difference]: With dead ends: 325 [2021-07-13 19:53:01,481 INFO L226 Difference]: Without dead ends: 317 [2021-07-13 19:53:01,481 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 474.1ms TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:53:01,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-07-13 19:53:01,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 253. [2021-07-13 19:53:01,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.4801587301587302) internal successors, (625), 252 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:01,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 625 transitions. [2021-07-13 19:53:01,483 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 625 transitions. Word has length 19 [2021-07-13 19:53:01,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:01,484 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 625 transitions. [2021-07-13 19:53:01,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:01,484 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 625 transitions. [2021-07-13 19:53:01,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:01,484 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:01,484 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:01,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16145,604 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:01,685 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:01,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:01,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1573595942, now seen corresponding path program 601 times [2021-07-13 19:53:01,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:01,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912590916] [2021-07-13 19:53:01,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:01,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:01,755 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:53:01,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:01,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912590916] [2021-07-13 19:53:01,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912590916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:01,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443136699] [2021-07-13 19:53:01,756 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:01,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:01,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:01,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:01,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:01,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:01,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:01,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:01,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:01,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:53:01,928 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:01,954 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:53:01,954 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:01,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:53:01,955 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:53:02,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:02,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443136699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:02,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:02,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:53:02,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913159420] [2021-07-13 19:53:02,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:53:02,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:02,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:53:02,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:53:02,006 INFO L87 Difference]: Start difference. First operand 253 states and 625 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:04,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:04,357 INFO L93 Difference]: Finished difference Result 573 states and 1191 transitions. [2021-07-13 19:53:04,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 19:53:04,358 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:04,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:04,358 INFO L225 Difference]: With dead ends: 573 [2021-07-13 19:53:04,358 INFO L226 Difference]: Without dead ends: 567 [2021-07-13 19:53:04,359 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 2199.6ms TimeCoverageRelationStatistics Valid=626, Invalid=3406, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 19:53:04,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-07-13 19:53:04,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 266. [2021-07-13 19:53:04,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.5283018867924527) internal successors, (670), 265 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:04,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 670 transitions. [2021-07-13 19:53:04,362 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 670 transitions. Word has length 19 [2021-07-13 19:53:04,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:04,362 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 670 transitions. [2021-07-13 19:53:04,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:04,362 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 670 transitions. [2021-07-13 19:53:04,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:04,363 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:04,363 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:04,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16162,605 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:04,563 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:04,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:04,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1320440677, now seen corresponding path program 602 times [2021-07-13 19:53:04,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:04,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451965474] [2021-07-13 19:53:04,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:04,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:04,631 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:53:04,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:04,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451965474] [2021-07-13 19:53:04,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451965474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:04,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20792997] [2021-07-13 19:53:04,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:04,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:04,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:04,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:04,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:04,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:04,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:04,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:53:04,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:04,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:53:04,841 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:04,882 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-07-13 19:53:04,882 INFO L518 ElimStorePlain]: Eliminatee v_prenex_637 vanished before elimination [2021-07-13 19:53:04,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:53:04,885 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:04,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:04,899 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:04,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:53:04,900 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:53:04,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:04,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20792997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:04,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:04,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:53:04,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260449707] [2021-07-13 19:53:04,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:53:04,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:04,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:53:04,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:53:04,962 INFO L87 Difference]: Start difference. First operand 266 states and 670 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:05,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:05,448 INFO L93 Difference]: Finished difference Result 369 states and 833 transitions. [2021-07-13 19:53:05,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:53:05,448 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:05,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:05,449 INFO L225 Difference]: With dead ends: 369 [2021-07-13 19:53:05,449 INFO L226 Difference]: Without dead ends: 363 [2021-07-13 19:53:05,449 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 481.7ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:53:05,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-07-13 19:53:05,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 265. [2021-07-13 19:53:05,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.522727272727273) internal successors, (666), 264 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:05,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 666 transitions. [2021-07-13 19:53:05,452 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 666 transitions. Word has length 19 [2021-07-13 19:53:05,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:05,452 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 666 transitions. [2021-07-13 19:53:05,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:05,452 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 666 transitions. [2021-07-13 19:53:05,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:05,452 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:05,452 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:05,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16172,606 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:05,653 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:05,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:05,653 INFO L82 PathProgramCache]: Analyzing trace with hash 873102954, now seen corresponding path program 603 times [2021-07-13 19:53:05,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:05,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178292637] [2021-07-13 19:53:05,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:05,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:05,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:53:05,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:05,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178292637] [2021-07-13 19:53:05,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178292637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:05,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242062825] [2021-07-13 19:53:05,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:05,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:53:05,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:05,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:05,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:05,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:05,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:05,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:05,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:05,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:05,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:53:05,899 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:05,926 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:53:05,926 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:05,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:53:05,927 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:53:05,969 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:05,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242062825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:05,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:05,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:53:05,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424108544] [2021-07-13 19:53:05,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:53:05,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:05,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:53:05,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:53:05,970 INFO L87 Difference]: Start difference. First operand 265 states and 666 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:07,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:07,282 INFO L93 Difference]: Finished difference Result 499 states and 1069 transitions. [2021-07-13 19:53:07,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:53:07,282 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:07,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:07,283 INFO L225 Difference]: With dead ends: 499 [2021-07-13 19:53:07,283 INFO L226 Difference]: Without dead ends: 495 [2021-07-13 19:53:07,283 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1233.4ms TimeCoverageRelationStatistics Valid=354, Invalid=1716, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:53:07,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-07-13 19:53:07,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 254. [2021-07-13 19:53:07,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.4822134387351777) internal successors, (628), 253 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:07,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 628 transitions. [2021-07-13 19:53:07,286 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 628 transitions. Word has length 19 [2021-07-13 19:53:07,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:07,286 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 628 transitions. [2021-07-13 19:53:07,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:07,287 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 628 transitions. [2021-07-13 19:53:07,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:07,287 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:07,287 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:07,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 607 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16189 [2021-07-13 19:53:07,487 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:07,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:07,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1109694291, now seen corresponding path program 604 times [2021-07-13 19:53:07,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:07,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826067749] [2021-07-13 19:53:07,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:07,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:07,557 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:53:07,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:07,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826067749] [2021-07-13 19:53:07,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826067749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:07,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363846569] [2021-07-13 19:53:07,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:07,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:53:07,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:07,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:07,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:07,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:07,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:07,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:53:07,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:07,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:53:07,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:07,805 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-07-13 19:53:07,805 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:07,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:53:07,808 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:07,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:07,822 INFO L518 ElimStorePlain]: Eliminatee v_prenex_640 vanished before elimination [2021-07-13 19:53:07,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:53:07,823 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:53:07,898 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:07,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363846569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:07,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:07,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:53:07,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473099165] [2021-07-13 19:53:07,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:53:07,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:07,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:53:07,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:53:07,899 INFO L87 Difference]: Start difference. First operand 254 states and 628 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:08,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:08,555 INFO L93 Difference]: Finished difference Result 335 states and 758 transitions. [2021-07-13 19:53:08,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:53:08,556 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:08,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:08,556 INFO L225 Difference]: With dead ends: 335 [2021-07-13 19:53:08,556 INFO L226 Difference]: Without dead ends: 331 [2021-07-13 19:53:08,556 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 681.5ms TimeCoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:53:08,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-07-13 19:53:08,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 253. [2021-07-13 19:53:08,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.4801587301587302) internal successors, (625), 252 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:08,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 625 transitions. [2021-07-13 19:53:08,559 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 625 transitions. Word has length 19 [2021-07-13 19:53:08,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:08,559 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 625 transitions. [2021-07-13 19:53:08,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:08,559 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 625 transitions. [2021-07-13 19:53:08,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:08,559 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:08,559 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:08,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16197,608 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:08,760 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:08,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:08,760 INFO L82 PathProgramCache]: Analyzing trace with hash 337873152, now seen corresponding path program 605 times [2021-07-13 19:53:08,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:08,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767302997] [2021-07-13 19:53:08,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:08,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:08,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:53:08,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:08,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767302997] [2021-07-13 19:53:08,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767302997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:08,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776009735] [2021-07-13 19:53:08,831 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:08,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:53:08,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:08,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:08,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:09,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:09,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:09,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:09,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:09,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:09,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:53:09,013 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:09,034 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:53:09,034 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:09,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:09,035 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:53:09,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:09,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776009735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:09,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:09,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:53:09,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863734439] [2021-07-13 19:53:09,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:53:09,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:09,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:53:09,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:53:09,058 INFO L87 Difference]: Start difference. First operand 253 states and 625 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:10,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:10,086 INFO L93 Difference]: Finished difference Result 378 states and 859 transitions. [2021-07-13 19:53:10,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:53:10,086 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:10,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:10,087 INFO L225 Difference]: With dead ends: 378 [2021-07-13 19:53:10,087 INFO L226 Difference]: Without dead ends: 378 [2021-07-13 19:53:10,087 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 999.5ms TimeCoverageRelationStatistics Valid=275, Invalid=1365, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:53:10,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-07-13 19:53:10,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 247. [2021-07-13 19:53:10,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.4552845528455283) internal successors, (604), 246 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:10,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 604 transitions. [2021-07-13 19:53:10,093 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 604 transitions. Word has length 19 [2021-07-13 19:53:10,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:10,093 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 604 transitions. [2021-07-13 19:53:10,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:10,093 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 604 transitions. [2021-07-13 19:53:10,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:10,093 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:10,093 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:10,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 609 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16211 [2021-07-13 19:53:10,294 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:10,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:10,294 INFO L82 PathProgramCache]: Analyzing trace with hash -33983135, now seen corresponding path program 606 times [2021-07-13 19:53:10,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:10,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096419375] [2021-07-13 19:53:10,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:10,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:10,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:53:10,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:10,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096419375] [2021-07-13 19:53:10,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096419375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:10,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765860228] [2021-07-13 19:53:10,364 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:10,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:53:10,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:10,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:10,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:10,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:10,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:10,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:10,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:10,656 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:53:10,657 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:10,692 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:53:10,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:53:10,695 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:10,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:10,708 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:10,708 INFO L518 ElimStorePlain]: Eliminatee v_prenex_645 vanished before elimination [2021-07-13 19:53:10,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:53:10,709 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:53:10,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:10,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765860228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:10,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:10,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:53:10,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498373026] [2021-07-13 19:53:10,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:53:10,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:10,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:53:10,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:53:10,737 INFO L87 Difference]: Start difference. First operand 247 states and 604 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:11,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:11,207 INFO L93 Difference]: Finished difference Result 275 states and 649 transitions. [2021-07-13 19:53:11,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:53:11,207 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:11,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:11,208 INFO L225 Difference]: With dead ends: 275 [2021-07-13 19:53:11,208 INFO L226 Difference]: Without dead ends: 267 [2021-07-13 19:53:11,208 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 540.7ms TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:53:11,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-07-13 19:53:11,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 246. [2021-07-13 19:53:11,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.453061224489796) internal successors, (601), 245 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:11,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 601 transitions. [2021-07-13 19:53:11,210 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 601 transitions. Word has length 19 [2021-07-13 19:53:11,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:11,210 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 601 transitions. [2021-07-13 19:53:11,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:11,210 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 601 transitions. [2021-07-13 19:53:11,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:11,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:11,211 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:11,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16215,610 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:11,411 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:11,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:11,411 INFO L82 PathProgramCache]: Analyzing trace with hash 925618474, now seen corresponding path program 607 times [2021-07-13 19:53:11,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:11,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923810012] [2021-07-13 19:53:11,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:11,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:11,481 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:53:11,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:11,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923810012] [2021-07-13 19:53:11,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923810012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:11,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122284926] [2021-07-13 19:53:11,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:11,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:11,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:11,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:11,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:11,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:11,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:53:11,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:11,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:11,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:11,655 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:11,675 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:53:11,675 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:11,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:11,676 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:53:11,698 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:11,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122284926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:11,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:11,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:53:11,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208269828] [2021-07-13 19:53:11,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:53:11,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:11,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:53:11,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:53:11,699 INFO L87 Difference]: Start difference. First operand 246 states and 601 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:11,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:11,994 INFO L93 Difference]: Finished difference Result 317 states and 732 transitions. [2021-07-13 19:53:11,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:53:11,994 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:11,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:11,995 INFO L225 Difference]: With dead ends: 317 [2021-07-13 19:53:11,995 INFO L226 Difference]: Without dead ends: 317 [2021-07-13 19:53:11,995 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 290.7ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:53:11,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-07-13 19:53:11,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 240. [2021-07-13 19:53:11,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.430962343096234) internal successors, (581), 239 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:11,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 581 transitions. [2021-07-13 19:53:11,997 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 581 transitions. Word has length 19 [2021-07-13 19:53:11,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:11,998 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 581 transitions. [2021-07-13 19:53:11,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:11,998 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 581 transitions. [2021-07-13 19:53:11,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:11,998 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:11,998 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:12,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 611 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16231 [2021-07-13 19:53:12,199 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:12,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:12,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1046675667, now seen corresponding path program 608 times [2021-07-13 19:53:12,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:12,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068178243] [2021-07-13 19:53:12,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:12,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:12,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:53:12,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:12,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068178243] [2021-07-13 19:53:12,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068178243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:12,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171309143] [2021-07-13 19:53:12,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:12,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:12,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:12,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:12,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:12,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:12,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:12,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:12,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:12,554 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:53:12,554 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:12,590 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:53:12,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:53:12,593 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:12,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:12,606 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:12,606 INFO L518 ElimStorePlain]: Eliminatee v_prenex_650 vanished before elimination [2021-07-13 19:53:12,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:53:12,607 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:53:12,636 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:12,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171309143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:12,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:12,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 19:53:12,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735541186] [2021-07-13 19:53:12,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:53:12,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:12,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:53:12,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:53:12,637 INFO L87 Difference]: Start difference. First operand 240 states and 581 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:13,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:13,056 INFO L93 Difference]: Finished difference Result 261 states and 614 transitions. [2021-07-13 19:53:13,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:53:13,056 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:13,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:13,056 INFO L225 Difference]: With dead ends: 261 [2021-07-13 19:53:13,056 INFO L226 Difference]: Without dead ends: 249 [2021-07-13 19:53:13,057 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 483.8ms TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:53:13,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-07-13 19:53:13,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 239. [2021-07-13 19:53:13,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.4285714285714284) internal successors, (578), 238 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:13,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 578 transitions. [2021-07-13 19:53:13,059 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 578 transitions. Word has length 19 [2021-07-13 19:53:13,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:13,059 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 578 transitions. [2021-07-13 19:53:13,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:13,059 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 578 transitions. [2021-07-13 19:53:13,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:13,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:13,059 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:13,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16235 [2021-07-13 19:53:13,260 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:13,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:13,260 INFO L82 PathProgramCache]: Analyzing trace with hash -538832688, now seen corresponding path program 609 times [2021-07-13 19:53:13,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:13,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681645742] [2021-07-13 19:53:13,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:13,346 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:13,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:13,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681645742] [2021-07-13 19:53:13,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681645742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:13,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73590965] [2021-07-13 19:53:13,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:13,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:53:13,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:13,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:13,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:13,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:13,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:13,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:13,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:13,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:13,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:53:13,543 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:13,569 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:53:13,569 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:13,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:53:13,570 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:53:13,627 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:13,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73590965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:13,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:13,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:53:13,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203653842] [2021-07-13 19:53:13,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:53:13,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:13,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:53:13,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:13,628 INFO L87 Difference]: Start difference. First operand 239 states and 578 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:14,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:14,688 INFO L93 Difference]: Finished difference Result 322 states and 724 transitions. [2021-07-13 19:53:14,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:53:14,688 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:14,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:14,688 INFO L225 Difference]: With dead ends: 322 [2021-07-13 19:53:14,689 INFO L226 Difference]: Without dead ends: 316 [2021-07-13 19:53:14,689 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1082.8ms TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:53:14,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-07-13 19:53:14,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 247. [2021-07-13 19:53:14,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.451219512195122) internal successors, (603), 246 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:14,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 603 transitions. [2021-07-13 19:53:14,691 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 603 transitions. Word has length 19 [2021-07-13 19:53:14,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:14,691 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 603 transitions. [2021-07-13 19:53:14,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:14,691 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 603 transitions. [2021-07-13 19:53:14,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:14,692 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:14,692 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:14,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 613 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16252 [2021-07-13 19:53:14,892 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:14,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:14,893 INFO L82 PathProgramCache]: Analyzing trace with hash -791987953, now seen corresponding path program 610 times [2021-07-13 19:53:14,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:14,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132273370] [2021-07-13 19:53:14,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:14,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:14,974 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:14,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:14,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132273370] [2021-07-13 19:53:14,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132273370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:14,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302242470] [2021-07-13 19:53:14,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:15,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:53:15,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:15,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:15,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:15,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:15,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:15,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:53:15,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:15,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:53:15,201 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:15,241 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-07-13 19:53:15,241 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:15,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:53:15,243 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:15,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:15,258 INFO L518 ElimStorePlain]: Eliminatee v_prenex_653 vanished before elimination [2021-07-13 19:53:15,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:53:15,259 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:53:15,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:15,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302242470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:15,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:15,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:53:15,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188513913] [2021-07-13 19:53:15,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:53:15,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:15,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:53:15,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:15,320 INFO L87 Difference]: Start difference. First operand 247 states and 603 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:15,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:15,715 INFO L93 Difference]: Finished difference Result 328 states and 736 transitions. [2021-07-13 19:53:15,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:53:15,715 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:15,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:15,716 INFO L225 Difference]: With dead ends: 328 [2021-07-13 19:53:15,716 INFO L226 Difference]: Without dead ends: 328 [2021-07-13 19:53:15,716 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 410.2ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:53:15,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-07-13 19:53:15,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 247. [2021-07-13 19:53:15,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.451219512195122) internal successors, (603), 246 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:15,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 603 transitions. [2021-07-13 19:53:15,718 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 603 transitions. Word has length 19 [2021-07-13 19:53:15,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:15,719 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 603 transitions. [2021-07-13 19:53:15,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:15,719 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 603 transitions. [2021-07-13 19:53:15,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:15,719 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:15,719 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:15,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16262,614 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:15,919 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:15,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:15,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1239325676, now seen corresponding path program 611 times [2021-07-13 19:53:15,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:15,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512907462] [2021-07-13 19:53:15,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:15,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:16,001 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:16,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:16,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512907462] [2021-07-13 19:53:16,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512907462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:16,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088852649] [2021-07-13 19:53:16,002 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:16,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:53:16,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:16,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:16,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:16,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:16,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:16,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:53:16,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:16,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:16,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:16,195 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:16,220 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:53:16,220 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:16,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:53:16,225 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:53:16,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:16,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088852649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:16,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:16,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:53:16,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695489156] [2021-07-13 19:53:16,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:53:16,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:16,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:53:16,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:16,271 INFO L87 Difference]: Start difference. First operand 247 states and 603 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:17,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:17,255 INFO L93 Difference]: Finished difference Result 335 states and 756 transitions. [2021-07-13 19:53:17,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:53:17,256 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:17,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:17,256 INFO L225 Difference]: With dead ends: 335 [2021-07-13 19:53:17,256 INFO L226 Difference]: Without dead ends: 335 [2021-07-13 19:53:17,256 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 985.1ms TimeCoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:53:17,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-07-13 19:53:17,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 247. [2021-07-13 19:53:17,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.451219512195122) internal successors, (603), 246 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:17,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 603 transitions. [2021-07-13 19:53:17,259 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 603 transitions. Word has length 19 [2021-07-13 19:53:17,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:17,259 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 603 transitions. [2021-07-13 19:53:17,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:17,259 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 603 transitions. [2021-07-13 19:53:17,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:17,260 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:17,260 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:17,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 615 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16273 [2021-07-13 19:53:17,460 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:17,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:17,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1072844375, now seen corresponding path program 612 times [2021-07-13 19:53:17,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:17,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908003909] [2021-07-13 19:53:17,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:17,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:17,542 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:17,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:17,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908003909] [2021-07-13 19:53:17,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908003909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:17,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948717724] [2021-07-13 19:53:17,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:17,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:53:17,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:17,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:17,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:17,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:17,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:17,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:17,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:17,781 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:53:17,782 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:17,817 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-07-13 19:53:17,818 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:17,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:53:17,820 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:17,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:17,835 INFO L518 ElimStorePlain]: Eliminatee v_prenex_656 vanished before elimination [2021-07-13 19:53:17,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:53:17,835 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:53:17,917 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:17,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948717724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:17,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:17,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:53:17,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901164332] [2021-07-13 19:53:17,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:53:17,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:17,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:53:17,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:17,918 INFO L87 Difference]: Start difference. First operand 247 states and 603 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:18,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:18,511 INFO L93 Difference]: Finished difference Result 332 states and 738 transitions. [2021-07-13 19:53:18,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:53:18,512 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:18,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:18,512 INFO L225 Difference]: With dead ends: 332 [2021-07-13 19:53:18,512 INFO L226 Difference]: Without dead ends: 328 [2021-07-13 19:53:18,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 619.7ms TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:53:18,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-07-13 19:53:18,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 246. [2021-07-13 19:53:18,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.4489795918367347) internal successors, (600), 245 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:18,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 600 transitions. [2021-07-13 19:53:18,515 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 600 transitions. Word has length 19 [2021-07-13 19:53:18,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:18,515 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 600 transitions. [2021-07-13 19:53:18,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:18,515 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 600 transitions. [2021-07-13 19:53:18,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:18,515 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:18,515 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:18,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16281,616 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:18,716 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:18,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:18,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1774555478, now seen corresponding path program 613 times [2021-07-13 19:53:18,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:18,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425065067] [2021-07-13 19:53:18,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:18,800 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:18,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:18,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425065067] [2021-07-13 19:53:18,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425065067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:18,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279797121] [2021-07-13 19:53:18,800 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:18,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:18,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:18,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:19,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:19,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:19,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:53:19,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:19,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:19,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:19,008 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:19,028 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:53:19,029 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:19,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:19,029 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:53:19,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:19,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279797121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:19,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:19,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:53:19,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156108302] [2021-07-13 19:53:19,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:53:19,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:19,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:53:19,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:19,053 INFO L87 Difference]: Start difference. First operand 246 states and 600 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:20,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:20,045 INFO L93 Difference]: Finished difference Result 325 states and 750 transitions. [2021-07-13 19:53:20,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:53:20,045 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:20,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:20,045 INFO L225 Difference]: With dead ends: 325 [2021-07-13 19:53:20,045 INFO L226 Difference]: Without dead ends: 325 [2021-07-13 19:53:20,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 908.3ms TimeCoverageRelationStatistics Valid=199, Invalid=1207, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:53:20,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-07-13 19:53:20,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 246. [2021-07-13 19:53:20,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.4489795918367347) internal successors, (600), 245 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:20,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 600 transitions. [2021-07-13 19:53:20,048 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 600 transitions. Word has length 19 [2021-07-13 19:53:20,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:20,048 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 600 transitions. [2021-07-13 19:53:20,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:20,048 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 600 transitions. [2021-07-13 19:53:20,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:20,049 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:20,049 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:20,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 617 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16301 [2021-07-13 19:53:20,249 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:20,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:20,249 INFO L82 PathProgramCache]: Analyzing trace with hash -2146411765, now seen corresponding path program 614 times [2021-07-13 19:53:20,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:20,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649159598] [2021-07-13 19:53:20,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:20,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:20,333 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:20,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:20,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649159598] [2021-07-13 19:53:20,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649159598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:20,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773112949] [2021-07-13 19:53:20,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:20,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:20,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:20,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:20,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:20,659 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:53:20,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:20,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:20,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:20,663 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:20,698 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:53:20,698 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:20,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:53:20,701 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:20,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:20,714 INFO L518 ElimStorePlain]: Eliminatee v_prenex_662 vanished before elimination [2021-07-13 19:53:20,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:53:20,714 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:53:20,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:20,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773112949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:20,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:20,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:53:20,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134581067] [2021-07-13 19:53:20,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:53:20,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:20,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:53:20,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:20,744 INFO L87 Difference]: Start difference. First operand 246 states and 600 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:21,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:21,101 INFO L93 Difference]: Finished difference Result 278 states and 649 transitions. [2021-07-13 19:53:21,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:53:21,101 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:21,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:21,102 INFO L225 Difference]: With dead ends: 278 [2021-07-13 19:53:21,102 INFO L226 Difference]: Without dead ends: 270 [2021-07-13 19:53:21,102 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 447.7ms TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:53:21,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-07-13 19:53:21,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 245. [2021-07-13 19:53:21,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.44672131147541) internal successors, (597), 244 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:21,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 597 transitions. [2021-07-13 19:53:21,104 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 597 transitions. Word has length 19 [2021-07-13 19:53:21,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:21,105 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 597 transitions. [2021-07-13 19:53:21,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:21,105 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 597 transitions. [2021-07-13 19:53:21,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:21,105 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:21,105 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:21,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16305,618 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:21,305 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:21,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:21,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1186810156, now seen corresponding path program 615 times [2021-07-13 19:53:21,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:21,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280684635] [2021-07-13 19:53:21,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:21,389 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:21,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:21,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280684635] [2021-07-13 19:53:21,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280684635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:21,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239313169] [2021-07-13 19:53:21,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:21,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:53:21,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:21,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:21,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:21,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:21,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:21,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:53:21,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:21,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:21,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:21,597 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:21,618 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:53:21,618 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:21,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:21,619 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:53:21,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:21,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239313169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:21,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:21,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:53:21,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396484453] [2021-07-13 19:53:21,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:53:21,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:21,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:53:21,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:21,643 INFO L87 Difference]: Start difference. First operand 245 states and 597 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:22,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:22,095 INFO L93 Difference]: Finished difference Result 304 states and 709 transitions. [2021-07-13 19:53:22,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:53:22,095 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:22,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:22,096 INFO L225 Difference]: With dead ends: 304 [2021-07-13 19:53:22,096 INFO L226 Difference]: Without dead ends: 304 [2021-07-13 19:53:22,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 476.0ms TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:53:22,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-07-13 19:53:22,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 245. [2021-07-13 19:53:22,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.44672131147541) internal successors, (597), 244 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:22,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 597 transitions. [2021-07-13 19:53:22,099 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 597 transitions. Word has length 19 [2021-07-13 19:53:22,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:22,099 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 597 transitions. [2021-07-13 19:53:22,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:22,099 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 597 transitions. [2021-07-13 19:53:22,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:22,099 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:22,099 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:22,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 619 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16321 [2021-07-13 19:53:22,300 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:22,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:22,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1135862999, now seen corresponding path program 616 times [2021-07-13 19:53:22,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:22,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414212113] [2021-07-13 19:53:22,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:22,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:22,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:22,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:22,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414212113] [2021-07-13 19:53:22,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414212113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:22,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238175175] [2021-07-13 19:53:22,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:22,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:53:22,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:22,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:22,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:22,686 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:53:22,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:22,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:22,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:22,690 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:22,725 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:53:22,725 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:22,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:53:22,728 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:22,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:22,741 INFO L518 ElimStorePlain]: Eliminatee v_prenex_666 vanished before elimination [2021-07-13 19:53:22,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:53:22,742 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:53:22,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:22,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238175175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:22,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:22,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:53:22,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115590824] [2021-07-13 19:53:22,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:53:22,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:22,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:53:22,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:22,773 INFO L87 Difference]: Start difference. First operand 245 states and 597 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:23,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:23,084 INFO L93 Difference]: Finished difference Result 272 states and 639 transitions. [2021-07-13 19:53:23,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:53:23,084 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:23,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:23,084 INFO L225 Difference]: With dead ends: 272 [2021-07-13 19:53:23,084 INFO L226 Difference]: Without dead ends: 266 [2021-07-13 19:53:23,085 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 400.2ms TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:53:23,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-07-13 19:53:23,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 243. [2021-07-13 19:53:23,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.4421487603305785) internal successors, (591), 242 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:23,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 591 transitions. [2021-07-13 19:53:23,087 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 591 transitions. Word has length 19 [2021-07-13 19:53:23,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:23,087 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 591 transitions. [2021-07-13 19:53:23,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:23,087 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 591 transitions. [2021-07-13 19:53:23,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:23,087 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:23,087 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:23,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16325,620 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:23,288 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:23,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:23,288 INFO L82 PathProgramCache]: Analyzing trace with hash -146574358, now seen corresponding path program 617 times [2021-07-13 19:53:23,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:23,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937098136] [2021-07-13 19:53:23,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:23,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:23,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:23,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:23,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937098136] [2021-07-13 19:53:23,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937098136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:23,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050074410] [2021-07-13 19:53:23,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:23,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:53:23,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:23,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:23,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:23,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:23,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:23,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:23,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:23,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:23,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:53:23,567 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:23,588 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:53:23,588 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:23,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:23,589 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:53:23,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:23,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050074410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:23,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:23,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:53:23,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514054531] [2021-07-13 19:53:23,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:53:23,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:23,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:53:23,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:23,613 INFO L87 Difference]: Start difference. First operand 243 states and 591 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:23,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:23,850 INFO L93 Difference]: Finished difference Result 292 states and 682 transitions. [2021-07-13 19:53:23,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:53:23,850 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:23,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:23,851 INFO L225 Difference]: With dead ends: 292 [2021-07-13 19:53:23,851 INFO L226 Difference]: Without dead ends: 292 [2021-07-13 19:53:23,851 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 250.5ms TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:53:23,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-07-13 19:53:23,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 239. [2021-07-13 19:53:23,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.4285714285714284) internal successors, (578), 238 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:23,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 578 transitions. [2021-07-13 19:53:23,853 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 578 transitions. Word has length 19 [2021-07-13 19:53:23,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:23,853 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 578 transitions. [2021-07-13 19:53:23,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:23,853 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 578 transitions. [2021-07-13 19:53:23,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:23,854 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:23,854 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:24,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 621 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16342 [2021-07-13 19:53:24,054 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:24,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:24,055 INFO L82 PathProgramCache]: Analyzing trace with hash -192834421, now seen corresponding path program 618 times [2021-07-13 19:53:24,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:24,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480819812] [2021-07-13 19:53:24,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:24,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:24,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:24,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:24,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480819812] [2021-07-13 19:53:24,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480819812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:24,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241219171] [2021-07-13 19:53:24,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:24,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:53:24,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:24,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:24,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:24,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:24,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:24,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:24,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:24,507 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:53:24,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:24,543 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:53:24,543 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:24,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:53:24,546 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:24,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:24,559 INFO L518 ElimStorePlain]: Eliminatee v_prenex_672 vanished before elimination [2021-07-13 19:53:24,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:53:24,560 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:53:24,589 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:24,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241219171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:24,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:24,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:53:24,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512072681] [2021-07-13 19:53:24,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:53:24,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:24,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:53:24,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:24,590 INFO L87 Difference]: Start difference. First operand 239 states and 578 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:24,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:24,802 INFO L93 Difference]: Finished difference Result 262 states and 612 transitions. [2021-07-13 19:53:24,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:53:24,802 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:24,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:24,802 INFO L225 Difference]: With dead ends: 262 [2021-07-13 19:53:24,802 INFO L226 Difference]: Without dead ends: 246 [2021-07-13 19:53:24,803 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 378.8ms TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:53:24,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-07-13 19:53:24,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 229. [2021-07-13 19:53:24,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.43859649122807) internal successors, (556), 228 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:24,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 556 transitions. [2021-07-13 19:53:24,805 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 556 transitions. Word has length 19 [2021-07-13 19:53:24,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:24,805 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 556 transitions. [2021-07-13 19:53:24,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:24,806 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 556 transitions. [2021-07-13 19:53:24,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:24,806 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:24,806 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:25,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 622 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16346 [2021-07-13 19:53:25,006 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:25,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:25,007 INFO L82 PathProgramCache]: Analyzing trace with hash -2076858112, now seen corresponding path program 619 times [2021-07-13 19:53:25,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:25,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448303101] [2021-07-13 19:53:25,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:25,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:25,092 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:25,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:25,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448303101] [2021-07-13 19:53:25,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448303101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:25,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895875648] [2021-07-13 19:53:25,093 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:25,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:25,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:25,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:25,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:53:25,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:25,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:53:25,273 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:25,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:25,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:53:25,276 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:25,311 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-07-13 19:53:25,311 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:25,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:53:25,312 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-07-13 19:53:25,339 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:25,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895875648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:25,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:25,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:53:25,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34371907] [2021-07-13 19:53:25,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:53:25,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:25,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:53:25,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:53:25,341 INFO L87 Difference]: Start difference. First operand 229 states and 556 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:25,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:25,761 INFO L93 Difference]: Finished difference Result 360 states and 780 transitions. [2021-07-13 19:53:25,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:53:25,761 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:25,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:25,765 INFO L225 Difference]: With dead ends: 360 [2021-07-13 19:53:25,765 INFO L226 Difference]: Without dead ends: 348 [2021-07-13 19:53:25,765 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 364.2ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:53:25,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-07-13 19:53:25,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 229. [2021-07-13 19:53:25,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.4342105263157894) internal successors, (555), 228 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:25,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 555 transitions. [2021-07-13 19:53:25,769 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 555 transitions. Word has length 19 [2021-07-13 19:53:25,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:25,769 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 555 transitions. [2021-07-13 19:53:25,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:25,769 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 555 transitions. [2021-07-13 19:53:25,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:25,770 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:25,770 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:25,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 623 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16372 [2021-07-13 19:53:25,986 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:25,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:25,986 INFO L82 PathProgramCache]: Analyzing trace with hash -545931905, now seen corresponding path program 620 times [2021-07-13 19:53:25,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:25,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470281632] [2021-07-13 19:53:25,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:25,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:26,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:26,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:26,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470281632] [2021-07-13 19:53:26,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470281632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:26,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596053868] [2021-07-13 19:53:26,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:26,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:26,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:26,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:26,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:26,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:26,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:26,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:53:26,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:26,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:26,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:26,215 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:26,235 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-07-13 19:53:26,235 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:26,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:26,236 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-07-13 19:53:26,257 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:26,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596053868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:26,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:26,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:53:26,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870214064] [2021-07-13 19:53:26,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:53:26,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:26,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:53:26,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:53:26,258 INFO L87 Difference]: Start difference. First operand 229 states and 555 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:26,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:26,646 INFO L93 Difference]: Finished difference Result 447 states and 963 transitions. [2021-07-13 19:53:26,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:53:26,646 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:26,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:26,647 INFO L225 Difference]: With dead ends: 447 [2021-07-13 19:53:26,647 INFO L226 Difference]: Without dead ends: 447 [2021-07-13 19:53:26,647 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 279.5ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:53:26,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-07-13 19:53:26,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 237. [2021-07-13 19:53:26,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.4364406779661016) internal successors, (575), 236 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:26,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 575 transitions. [2021-07-13 19:53:26,650 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 575 transitions. Word has length 19 [2021-07-13 19:53:26,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:26,650 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 575 transitions. [2021-07-13 19:53:26,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:26,650 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 575 transitions. [2021-07-13 19:53:26,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:26,651 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:26,651 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:26,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 624 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16385 [2021-07-13 19:53:26,851 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:26,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:26,851 INFO L82 PathProgramCache]: Analyzing trace with hash -940754108, now seen corresponding path program 621 times [2021-07-13 19:53:26,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:26,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743135100] [2021-07-13 19:53:26,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:26,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:26,933 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:26,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:26,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743135100] [2021-07-13 19:53:26,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743135100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:26,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472250186] [2021-07-13 19:53:26,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:26,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:53:26,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:26,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:26,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:27,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:53:27,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:27,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:53:27,122 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:27,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:27,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:53:27,125 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:27,160 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-07-13 19:53:27,160 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:27,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:53:27,161 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-07-13 19:53:27,188 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:27,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472250186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:27,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:27,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:53:27,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386694309] [2021-07-13 19:53:27,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:53:27,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:27,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:53:27,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:53:27,189 INFO L87 Difference]: Start difference. First operand 237 states and 575 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:27,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:27,824 INFO L93 Difference]: Finished difference Result 385 states and 825 transitions. [2021-07-13 19:53:27,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:53:27,824 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:27,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:27,825 INFO L225 Difference]: With dead ends: 385 [2021-07-13 19:53:27,825 INFO L226 Difference]: Without dead ends: 370 [2021-07-13 19:53:27,825 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 581.9ms TimeCoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:53:27,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-07-13 19:53:27,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 235. [2021-07-13 19:53:27,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.427350427350427) internal successors, (568), 234 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:27,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 568 transitions. [2021-07-13 19:53:27,828 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 568 transitions. Word has length 19 [2021-07-13 19:53:27,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:27,828 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 568 transitions. [2021-07-13 19:53:27,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:27,828 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 568 transitions. [2021-07-13 19:53:27,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:27,828 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:27,828 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:28,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 625 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16389 [2021-07-13 19:53:28,029 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:28,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:28,029 INFO L82 PathProgramCache]: Analyzing trace with hash -198632731, now seen corresponding path program 622 times [2021-07-13 19:53:28,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:28,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935007998] [2021-07-13 19:53:28,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:28,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:28,108 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:28,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:28,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935007998] [2021-07-13 19:53:28,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935007998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:28,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906133087] [2021-07-13 19:53:28,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:28,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:53:28,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:28,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:28,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:28,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:28,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:28,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:53:28,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:28,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:28,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:28,262 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:28,282 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-07-13 19:53:28,282 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:28,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:28,283 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-07-13 19:53:28,304 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:28,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906133087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:28,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:28,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:53:28,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656702992] [2021-07-13 19:53:28,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:53:28,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:28,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:53:28,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:53:28,305 INFO L87 Difference]: Start difference. First operand 235 states and 568 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:28,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:28,858 INFO L93 Difference]: Finished difference Result 494 states and 1060 transitions. [2021-07-13 19:53:28,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:53:28,858 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:28,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:28,859 INFO L225 Difference]: With dead ends: 494 [2021-07-13 19:53:28,859 INFO L226 Difference]: Without dead ends: 488 [2021-07-13 19:53:28,859 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 476.7ms TimeCoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:53:28,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-07-13 19:53:28,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 225. [2021-07-13 19:53:28,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.4375) internal successors, (546), 224 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:28,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 546 transitions. [2021-07-13 19:53:28,862 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 546 transitions. Word has length 19 [2021-07-13 19:53:28,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:28,862 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 546 transitions. [2021-07-13 19:53:28,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:28,862 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 546 transitions. [2021-07-13 19:53:28,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:28,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:28,863 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:29,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16404,626 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:29,063 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:29,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:29,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1181200256, now seen corresponding path program 623 times [2021-07-13 19:53:29,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:29,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242903556] [2021-07-13 19:53:29,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:29,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:29,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:29,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:29,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242903556] [2021-07-13 19:53:29,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242903556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:29,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109902572] [2021-07-13 19:53:29,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:29,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:53:29,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:29,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:29,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:29,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:29,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:29,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:29,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:29,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:29,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:53:29,310 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:29,339 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:53:29,339 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:29,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:53:29,339 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:53:29,394 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:29,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109902572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:29,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:29,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:53:29,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782737732] [2021-07-13 19:53:29,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:53:29,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:29,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:53:29,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:53:29,395 INFO L87 Difference]: Start difference. First operand 225 states and 546 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:30,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:30,433 INFO L93 Difference]: Finished difference Result 449 states and 929 transitions. [2021-07-13 19:53:30,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 19:53:30,434 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:30,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:30,434 INFO L225 Difference]: With dead ends: 449 [2021-07-13 19:53:30,434 INFO L226 Difference]: Without dead ends: 440 [2021-07-13 19:53:30,434 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 886.5ms TimeCoverageRelationStatistics Valid=236, Invalid=1656, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:53:30,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-07-13 19:53:30,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 229. [2021-07-13 19:53:30,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.456140350877193) internal successors, (560), 228 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:30,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 560 transitions. [2021-07-13 19:53:30,437 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 560 transitions. Word has length 19 [2021-07-13 19:53:30,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:30,437 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 560 transitions. [2021-07-13 19:53:30,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:30,437 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 560 transitions. [2021-07-13 19:53:30,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:30,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:30,438 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:30,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16408,627 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:30,638 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:30,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:30,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1434355521, now seen corresponding path program 624 times [2021-07-13 19:53:30,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:30,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996785244] [2021-07-13 19:53:30,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:30,715 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:30,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:30,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996785244] [2021-07-13 19:53:30,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996785244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:30,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784087839] [2021-07-13 19:53:30,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:30,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:53:30,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:30,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:30,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:30,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:53:30,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:30,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:30,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:30,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:30,854 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:30,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:53:30,857 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:30,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:30,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:53:30,860 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:30,894 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-07-13 19:53:30,895 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:30,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:53:30,896 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:53:30,939 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:30,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784087839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:30,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:30,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:53:30,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473299198] [2021-07-13 19:53:30,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:53:30,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:30,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:53:30,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:53:30,940 INFO L87 Difference]: Start difference. First operand 229 states and 560 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:31,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:31,855 INFO L93 Difference]: Finished difference Result 584 states and 1209 transitions. [2021-07-13 19:53:31,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:53:31,855 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:31,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:31,856 INFO L225 Difference]: With dead ends: 584 [2021-07-13 19:53:31,856 INFO L226 Difference]: Without dead ends: 578 [2021-07-13 19:53:31,856 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 802.6ms TimeCoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:53:31,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-07-13 19:53:31,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 229. [2021-07-13 19:53:31,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.456140350877193) internal successors, (560), 228 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:31,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 560 transitions. [2021-07-13 19:53:31,859 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 560 transitions. Word has length 19 [2021-07-13 19:53:31,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:31,859 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 560 transitions. [2021-07-13 19:53:31,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:31,859 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 560 transitions. [2021-07-13 19:53:31,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:31,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:31,860 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:32,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16426,628 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:32,060 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:32,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:32,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1881693244, now seen corresponding path program 625 times [2021-07-13 19:53:32,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:32,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247404231] [2021-07-13 19:53:32,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:32,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:32,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:32,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:32,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247404231] [2021-07-13 19:53:32,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247404231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:32,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232646031] [2021-07-13 19:53:32,137 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:32,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:32,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:32,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:32,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:32,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:32,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:53:32,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:32,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:32,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:32,300 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:32,329 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:53:32,329 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:32,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:53:32,330 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:53:32,373 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:32,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232646031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:32,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:32,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:53:32,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765568340] [2021-07-13 19:53:32,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:53:32,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:32,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:53:32,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:53:32,374 INFO L87 Difference]: Start difference. First operand 229 states and 560 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:32,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:32,902 INFO L93 Difference]: Finished difference Result 382 states and 836 transitions. [2021-07-13 19:53:32,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:53:32,902 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:32,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:32,903 INFO L225 Difference]: With dead ends: 382 [2021-07-13 19:53:32,903 INFO L226 Difference]: Without dead ends: 382 [2021-07-13 19:53:32,903 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 486.5ms TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:53:32,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-07-13 19:53:32,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 227. [2021-07-13 19:53:32,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.4424778761061945) internal successors, (552), 226 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:32,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 552 transitions. [2021-07-13 19:53:32,906 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 552 transitions. Word has length 19 [2021-07-13 19:53:32,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:32,906 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 552 transitions. [2021-07-13 19:53:32,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:32,906 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 552 transitions. [2021-07-13 19:53:32,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:32,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:32,906 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:33,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16436,629 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:33,107 INFO L430 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:33,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:33,107 INFO L82 PathProgramCache]: Analyzing trace with hash 430476807, now seen corresponding path program 626 times [2021-07-13 19:53:33,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:33,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606886809] [2021-07-13 19:53:33,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:33,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:33,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:33,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:33,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606886809] [2021-07-13 19:53:33,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606886809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:33,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981244053] [2021-07-13 19:53:33,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:33,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:33,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:33,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:33,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:33,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:53:33,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:33,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:53:33,321 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:33,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:33,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:33,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:33,325 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:33,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:33,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:53:33,328 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:33,362 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-07-13 19:53:33,362 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:33,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:53:33,363 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:53:33,452 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:33,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981244053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:33,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:33,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:53:33,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101045803] [2021-07-13 19:53:33,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:53:33,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:33,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:53:33,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:53:33,453 INFO L87 Difference]: Start difference. First operand 227 states and 552 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:34,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:34,812 INFO L93 Difference]: Finished difference Result 519 states and 1080 transitions. [2021-07-13 19:53:34,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 19:53:34,812 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:34,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:34,813 INFO L225 Difference]: With dead ends: 519 [2021-07-13 19:53:34,813 INFO L226 Difference]: Without dead ends: 513 [2021-07-13 19:53:34,813 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 1211.3ms TimeCoverageRelationStatistics Valid=330, Invalid=2532, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 19:53:34,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-07-13 19:53:34,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 222. [2021-07-13 19:53:34,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.4434389140271495) internal successors, (540), 221 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:34,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 540 transitions. [2021-07-13 19:53:34,816 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 540 transitions. Word has length 19 [2021-07-13 19:53:34,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:34,816 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 540 transitions. [2021-07-13 19:53:34,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:34,816 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 540 transitions. [2021-07-13 19:53:34,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:34,816 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:34,817 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:35,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16446,630 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:35,017 INFO L430 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:35,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:35,017 INFO L82 PathProgramCache]: Analyzing trace with hash 446780864, now seen corresponding path program 627 times [2021-07-13 19:53:35,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:35,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179121361] [2021-07-13 19:53:35,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:35,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:35,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:35,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179121361] [2021-07-13 19:53:35,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179121361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:35,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500773616] [2021-07-13 19:53:35,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:35,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:53:35,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:35,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:35,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:35,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:35,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:35,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:35,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:35,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:35,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:53:35,232 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:35,257 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:53:35,257 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:35,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:53:35,258 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:53:35,307 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:35,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500773616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:35,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:35,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:53:35,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072406742] [2021-07-13 19:53:35,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:35,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:35,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:35,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:35,308 INFO L87 Difference]: Start difference. First operand 222 states and 540 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:36,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:36,521 INFO L93 Difference]: Finished difference Result 523 states and 1059 transitions. [2021-07-13 19:53:36,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 19:53:36,521 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:36,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:36,522 INFO L225 Difference]: With dead ends: 523 [2021-07-13 19:53:36,522 INFO L226 Difference]: Without dead ends: 517 [2021-07-13 19:53:36,522 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1063.6ms TimeCoverageRelationStatistics Valid=332, Invalid=2118, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 19:53:36,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-07-13 19:53:36,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 227. [2021-07-13 19:53:36,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.4646017699115044) internal successors, (557), 226 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:36,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 557 transitions. [2021-07-13 19:53:36,525 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 557 transitions. Word has length 19 [2021-07-13 19:53:36,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:36,525 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 557 transitions. [2021-07-13 19:53:36,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:36,525 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 557 transitions. [2021-07-13 19:53:36,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:36,526 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:36,526 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:36,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 631 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16459 [2021-07-13 19:53:36,726 INFO L430 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:36,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:36,726 INFO L82 PathProgramCache]: Analyzing trace with hash 193625599, now seen corresponding path program 628 times [2021-07-13 19:53:36,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:36,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110710987] [2021-07-13 19:53:36,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:36,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:36,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:36,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:36,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110710987] [2021-07-13 19:53:36,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110710987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:36,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160676689] [2021-07-13 19:53:36,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:36,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:53:36,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:36,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:36,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:36,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:53:36,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:37,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:37,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:37,002 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:37,051 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-07-13 19:53:37,051 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:37,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:53:37,055 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:37,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:37,072 INFO L518 ElimStorePlain]: Eliminatee v_prenex_674 vanished before elimination [2021-07-13 19:53:37,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:53:37,073 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:53:37,126 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:37,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160676689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:37,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:37,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:53:37,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425008337] [2021-07-13 19:53:37,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:37,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:37,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:37,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:37,127 INFO L87 Difference]: Start difference. First operand 227 states and 557 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:37,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:37,624 INFO L93 Difference]: Finished difference Result 384 states and 813 transitions. [2021-07-13 19:53:37,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:53:37,624 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:37,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:37,625 INFO L225 Difference]: With dead ends: 384 [2021-07-13 19:53:37,625 INFO L226 Difference]: Without dead ends: 372 [2021-07-13 19:53:37,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 490.5ms TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:53:37,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-07-13 19:53:37,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 221. [2021-07-13 19:53:37,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.440909090909091) internal successors, (537), 220 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:37,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 537 transitions. [2021-07-13 19:53:37,627 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 537 transitions. Word has length 19 [2021-07-13 19:53:37,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:37,627 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 537 transitions. [2021-07-13 19:53:37,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:37,628 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 537 transitions. [2021-07-13 19:53:37,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:37,628 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:37,628 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:37,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16469,632 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:37,828 INFO L430 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:37,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:37,829 INFO L82 PathProgramCache]: Analyzing trace with hash -253712124, now seen corresponding path program 629 times [2021-07-13 19:53:37,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:37,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459578721] [2021-07-13 19:53:37,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:37,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:37,896 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:37,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:37,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459578721] [2021-07-13 19:53:37,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459578721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:37,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687054055] [2021-07-13 19:53:37,896 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:37,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:53:37,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:37,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:37,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:38,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:38,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:38,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:53:38,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:38,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:38,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:38,049 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:38,074 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:53:38,075 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:38,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:53:38,075 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:53:38,120 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:38,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687054055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:38,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:38,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:53:38,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913578916] [2021-07-13 19:53:38,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:38,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:38,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:38,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:38,121 INFO L87 Difference]: Start difference. First operand 221 states and 537 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:38,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:38,683 INFO L93 Difference]: Finished difference Result 423 states and 911 transitions. [2021-07-13 19:53:38,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:53:38,683 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:38,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:38,684 INFO L225 Difference]: With dead ends: 423 [2021-07-13 19:53:38,684 INFO L226 Difference]: Without dead ends: 423 [2021-07-13 19:53:38,684 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 508.6ms TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:53:38,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-07-13 19:53:38,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 216. [2021-07-13 19:53:38,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.4046511627906977) internal successors, (517), 215 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:38,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 517 transitions. [2021-07-13 19:53:38,686 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 517 transitions. Word has length 19 [2021-07-13 19:53:38,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:38,687 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 517 transitions. [2021-07-13 19:53:38,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:38,687 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 517 transitions. [2021-07-13 19:53:38,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:38,687 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:38,687 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:38,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 633 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16486 [2021-07-13 19:53:38,888 INFO L430 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:38,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:38,888 INFO L82 PathProgramCache]: Analyzing trace with hash 2058457927, now seen corresponding path program 630 times [2021-07-13 19:53:38,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:38,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744159901] [2021-07-13 19:53:38,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:38,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:38,958 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:38,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:38,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744159901] [2021-07-13 19:53:38,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744159901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:38,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743562451] [2021-07-13 19:53:38,958 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:38,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:53:38,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:38,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:38,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:39,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:53:39,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:39,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:39,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:39,137 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:39,177 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-07-13 19:53:39,177 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:39,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:53:39,180 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:39,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:39,194 INFO L518 ElimStorePlain]: Eliminatee v_prenex_678 vanished before elimination [2021-07-13 19:53:39,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:53:39,195 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:53:39,268 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:39,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743562451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:39,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:39,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:53:39,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451487666] [2021-07-13 19:53:39,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:39,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:39,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:39,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:39,269 INFO L87 Difference]: Start difference. First operand 216 states and 517 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:40,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:40,105 INFO L93 Difference]: Finished difference Result 346 states and 741 transitions. [2021-07-13 19:53:40,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:53:40,105 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:40,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:40,106 INFO L225 Difference]: With dead ends: 346 [2021-07-13 19:53:40,106 INFO L226 Difference]: Without dead ends: 342 [2021-07-13 19:53:40,106 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 781.8ms TimeCoverageRelationStatistics Valid=200, Invalid=1360, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:53:40,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-07-13 19:53:40,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 214. [2021-07-13 19:53:40,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.39906103286385) internal successors, (511), 213 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:40,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 511 transitions. [2021-07-13 19:53:40,108 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 511 transitions. Word has length 19 [2021-07-13 19:53:40,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:40,108 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 511 transitions. [2021-07-13 19:53:40,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:40,108 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 511 transitions. [2021-07-13 19:53:40,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:40,109 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:40,109 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:40,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16494,634 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:40,309 INFO L430 AbstractCegarLoop]: === Iteration 652 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:40,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:40,310 INFO L82 PathProgramCache]: Analyzing trace with hash -788941926, now seen corresponding path program 631 times [2021-07-13 19:53:40,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:40,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723690207] [2021-07-13 19:53:40,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:40,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:40,380 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:40,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:40,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723690207] [2021-07-13 19:53:40,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723690207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:40,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409089832] [2021-07-13 19:53:40,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:40,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:40,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:40,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:40,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:40,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:40,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:53:40,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:40,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:40,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:40,540 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:40,562 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:53:40,563 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:40,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:40,563 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:53:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:40,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409089832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:40,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:40,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:53:40,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271289090] [2021-07-13 19:53:40,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:40,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:40,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:40,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:40,586 INFO L87 Difference]: Start difference. First operand 214 states and 511 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:40,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:40,922 INFO L93 Difference]: Finished difference Result 344 states and 758 transitions. [2021-07-13 19:53:40,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:53:40,922 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:40,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:40,922 INFO L225 Difference]: With dead ends: 344 [2021-07-13 19:53:40,922 INFO L226 Difference]: Without dead ends: 344 [2021-07-13 19:53:40,923 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 287.9ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:53:40,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-07-13 19:53:40,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 210. [2021-07-13 19:53:40,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.3779904306220097) internal successors, (497), 209 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:40,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 497 transitions. [2021-07-13 19:53:40,925 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 497 transitions. Word has length 19 [2021-07-13 19:53:40,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:40,925 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 497 transitions. [2021-07-13 19:53:40,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:40,925 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 497 transitions. [2021-07-13 19:53:40,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:40,926 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:40,926 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:41,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16514,635 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:41,126 INFO L430 AbstractCegarLoop]: === Iteration 653 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:41,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:41,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1160798213, now seen corresponding path program 632 times [2021-07-13 19:53:41,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:41,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119957252] [2021-07-13 19:53:41,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:41,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:41,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:41,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:41,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119957252] [2021-07-13 19:53:41,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119957252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:41,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349666317] [2021-07-13 19:53:41,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:41,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:41,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:41,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:41,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:41,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:41,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:41,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:41,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:41,448 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:53:41,448 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:41,484 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:53:41,484 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:41,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:53:41,487 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:41,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:41,500 INFO L518 ElimStorePlain]: Eliminatee v_prenex_681 vanished before elimination [2021-07-13 19:53:41,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:53:41,501 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:53:41,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:41,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349666317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:41,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:41,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:53:41,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699058411] [2021-07-13 19:53:41,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:41,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:41,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:41,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:41,528 INFO L87 Difference]: Start difference. First operand 210 states and 497 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:41,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:41,936 INFO L93 Difference]: Finished difference Result 270 states and 610 transitions. [2021-07-13 19:53:41,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:53:41,936 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:41,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:41,936 INFO L225 Difference]: With dead ends: 270 [2021-07-13 19:53:41,936 INFO L226 Difference]: Without dead ends: 262 [2021-07-13 19:53:41,936 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 421.5ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:53:41,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-07-13 19:53:41,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 208. [2021-07-13 19:53:41,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.3719806763285023) internal successors, (491), 207 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:41,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 491 transitions. [2021-07-13 19:53:41,939 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 491 transitions. Word has length 19 [2021-07-13 19:53:41,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:41,939 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 491 transitions. [2021-07-13 19:53:41,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:41,939 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 491 transitions. [2021-07-13 19:53:41,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:41,939 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:41,939 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:42,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 636 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16518 [2021-07-13 19:53:42,140 INFO L430 AbstractCegarLoop]: === Iteration 654 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:42,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:42,140 INFO L82 PathProgramCache]: Analyzing trace with hash -625411968, now seen corresponding path program 633 times [2021-07-13 19:53:42,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:42,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526527776] [2021-07-13 19:53:42,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:42,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:42,206 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:42,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:42,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526527776] [2021-07-13 19:53:42,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526527776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:42,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802365808] [2021-07-13 19:53:42,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:42,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:53:42,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:42,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:42,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:42,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:42,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:42,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:42,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:42,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:42,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:53:42,370 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:42,395 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:53:42,395 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:42,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:53:42,396 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:53:42,446 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:42,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802365808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:42,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:42,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:53:42,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318360459] [2021-07-13 19:53:42,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:42,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:42,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:42,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:42,447 INFO L87 Difference]: Start difference. First operand 208 states and 491 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:43,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:43,406 INFO L93 Difference]: Finished difference Result 417 states and 905 transitions. [2021-07-13 19:53:43,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:53:43,407 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:43,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:43,407 INFO L225 Difference]: With dead ends: 417 [2021-07-13 19:53:43,407 INFO L226 Difference]: Without dead ends: 411 [2021-07-13 19:53:43,408 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 924.3ms TimeCoverageRelationStatistics Valid=222, Invalid=1418, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:53:43,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-07-13 19:53:43,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 217. [2021-07-13 19:53:43,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.4166666666666665) internal successors, (522), 216 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:43,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 522 transitions. [2021-07-13 19:53:43,410 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 522 transitions. Word has length 19 [2021-07-13 19:53:43,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:43,410 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 522 transitions. [2021-07-13 19:53:43,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:43,410 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 522 transitions. [2021-07-13 19:53:43,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:43,411 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:43,411 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:43,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16545,637 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:43,611 INFO L430 AbstractCegarLoop]: === Iteration 655 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:43,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:43,612 INFO L82 PathProgramCache]: Analyzing trace with hash -878567233, now seen corresponding path program 634 times [2021-07-13 19:53:43,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:43,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262228920] [2021-07-13 19:53:43,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:43,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:43,678 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:43,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:43,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262228920] [2021-07-13 19:53:43,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262228920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:43,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513100591] [2021-07-13 19:53:43,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:43,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:53:43,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:43,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:43,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:43,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:43,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:43,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:53:43,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:43,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:53:43,877 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:43,926 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-07-13 19:53:43,926 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:43,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:53:43,929 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:43,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:43,943 INFO L518 ElimStorePlain]: Eliminatee v_prenex_685 vanished before elimination [2021-07-13 19:53:43,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:53:43,944 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:53:43,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:43,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513100591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:43,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:43,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:53:43,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102937161] [2021-07-13 19:53:43,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:43,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:43,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:43,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:43,999 INFO L87 Difference]: Start difference. First operand 217 states and 522 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:44,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:44,421 INFO L93 Difference]: Finished difference Result 345 states and 755 transitions. [2021-07-13 19:53:44,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:53:44,421 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:44,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:44,421 INFO L225 Difference]: With dead ends: 345 [2021-07-13 19:53:44,421 INFO L226 Difference]: Without dead ends: 339 [2021-07-13 19:53:44,422 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 391.2ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:53:44,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-07-13 19:53:44,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 217. [2021-07-13 19:53:44,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.4166666666666665) internal successors, (522), 216 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:44,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 522 transitions. [2021-07-13 19:53:44,424 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 522 transitions. Word has length 19 [2021-07-13 19:53:44,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:44,424 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 522 transitions. [2021-07-13 19:53:44,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:44,424 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 522 transitions. [2021-07-13 19:53:44,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:44,425 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:44,425 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:44,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 638 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16555 [2021-07-13 19:53:44,625 INFO L430 AbstractCegarLoop]: === Iteration 656 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:44,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:44,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1325904956, now seen corresponding path program 635 times [2021-07-13 19:53:44,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:44,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068859860] [2021-07-13 19:53:44,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:44,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:44,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:44,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:44,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068859860] [2021-07-13 19:53:44,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068859860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:44,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204999798] [2021-07-13 19:53:44,693 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:44,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:53:44,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:44,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:44,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:44,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:44,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:44,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:53:44,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:44,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:44,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:44,857 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:44,882 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:53:44,882 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:44,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:53:44,883 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:53:44,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:44,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204999798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:44,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:44,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:53:44,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828118892] [2021-07-13 19:53:44,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:44,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:44,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:44,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:44,925 INFO L87 Difference]: Start difference. First operand 217 states and 522 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:45,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:45,708 INFO L93 Difference]: Finished difference Result 448 states and 964 transitions. [2021-07-13 19:53:45,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:53:45,708 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:45,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:45,709 INFO L225 Difference]: With dead ends: 448 [2021-07-13 19:53:45,709 INFO L226 Difference]: Without dead ends: 448 [2021-07-13 19:53:45,709 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 722.4ms TimeCoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:53:45,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-07-13 19:53:45,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 215. [2021-07-13 19:53:45,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.4018691588785046) internal successors, (514), 214 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:45,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 514 transitions. [2021-07-13 19:53:45,712 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 514 transitions. Word has length 19 [2021-07-13 19:53:45,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:45,712 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 514 transitions. [2021-07-13 19:53:45,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:45,712 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 514 transitions. [2021-07-13 19:53:45,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:45,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:45,712 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:45,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16572,639 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:45,913 INFO L430 AbstractCegarLoop]: === Iteration 657 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:45,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:45,913 INFO L82 PathProgramCache]: Analyzing trace with hash 986265095, now seen corresponding path program 636 times [2021-07-13 19:53:45,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:45,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54040556] [2021-07-13 19:53:45,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:45,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:45,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:45,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:45,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54040556] [2021-07-13 19:53:45,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54040556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:45,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358080214] [2021-07-13 19:53:45,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:46,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:53:46,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:46,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:46,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:46,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:53:46,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:46,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:46,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:46,177 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:46,219 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-07-13 19:53:46,219 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:46,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:53:46,222 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:46,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:46,236 INFO L518 ElimStorePlain]: Eliminatee v_prenex_688 vanished before elimination [2021-07-13 19:53:46,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:53:46,237 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:53:46,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:46,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358080214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:46,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:46,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:53:46,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077994602] [2021-07-13 19:53:46,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:46,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:46,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:46,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:46,314 INFO L87 Difference]: Start difference. First operand 215 states and 514 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:46,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:46,944 INFO L93 Difference]: Finished difference Result 336 states and 733 transitions. [2021-07-13 19:53:46,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:53:46,944 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:46,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:46,945 INFO L225 Difference]: With dead ends: 336 [2021-07-13 19:53:46,945 INFO L226 Difference]: Without dead ends: 332 [2021-07-13 19:53:46,945 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 571.6ms TimeCoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:53:46,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-07-13 19:53:46,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 214. [2021-07-13 19:53:46,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.39906103286385) internal successors, (511), 213 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:46,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 511 transitions. [2021-07-13 19:53:46,947 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 511 transitions. Word has length 19 [2021-07-13 19:53:46,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:46,948 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 511 transitions. [2021-07-13 19:53:46,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:46,948 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 511 transitions. [2021-07-13 19:53:46,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:46,948 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:46,948 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:47,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 640 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16580 [2021-07-13 19:53:47,148 INFO L430 AbstractCegarLoop]: === Iteration 658 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:47,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:47,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1861134758, now seen corresponding path program 637 times [2021-07-13 19:53:47,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:47,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074849754] [2021-07-13 19:53:47,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:47,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:47,218 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:47,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:47,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074849754] [2021-07-13 19:53:47,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074849754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:47,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037019597] [2021-07-13 19:53:47,218 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:47,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:47,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:47,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:47,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:47,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:47,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:53:47,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:47,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:47,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:47,390 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:47,412 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:53:47,412 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:47,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:47,413 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:53:47,435 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:47,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037019597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:47,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:47,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:53:47,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052393547] [2021-07-13 19:53:47,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:47,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:47,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:47,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:47,436 INFO L87 Difference]: Start difference. First operand 214 states and 511 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:47,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:47,877 INFO L93 Difference]: Finished difference Result 389 states and 858 transitions. [2021-07-13 19:53:47,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:53:47,877 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:47,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:47,878 INFO L225 Difference]: With dead ends: 389 [2021-07-13 19:53:47,878 INFO L226 Difference]: Without dead ends: 389 [2021-07-13 19:53:47,878 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 428.7ms TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:53:47,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-07-13 19:53:47,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 214. [2021-07-13 19:53:47,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.3943661971830985) internal successors, (510), 213 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:47,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 510 transitions. [2021-07-13 19:53:47,880 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 510 transitions. Word has length 19 [2021-07-13 19:53:47,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:47,880 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 510 transitions. [2021-07-13 19:53:47,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:47,881 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 510 transitions. [2021-07-13 19:53:47,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:47,881 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:47,881 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:48,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 641 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16594 [2021-07-13 19:53:48,081 INFO L430 AbstractCegarLoop]: === Iteration 659 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:48,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:48,082 INFO L82 PathProgramCache]: Analyzing trace with hash 2061976251, now seen corresponding path program 638 times [2021-07-13 19:53:48,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:48,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674658565] [2021-07-13 19:53:48,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:48,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:48,151 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:48,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:48,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674658565] [2021-07-13 19:53:48,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674658565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:48,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898513457] [2021-07-13 19:53:48,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:48,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:48,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:48,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:48,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:48,434 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:53:48,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:48,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:48,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:48,439 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:48,473 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:53:48,474 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:48,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:53:48,477 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:48,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:48,490 INFO L518 ElimStorePlain]: Eliminatee v_prenex_694 vanished before elimination [2021-07-13 19:53:48,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:53:48,491 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:53:48,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:48,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898513457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:48,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:48,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:53:48,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389063053] [2021-07-13 19:53:48,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:48,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:48,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:48,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:48,520 INFO L87 Difference]: Start difference. First operand 214 states and 510 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:48,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:48,833 INFO L93 Difference]: Finished difference Result 278 states and 628 transitions. [2021-07-13 19:53:48,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:53:48,834 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:48,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:48,834 INFO L225 Difference]: With dead ends: 278 [2021-07-13 19:53:48,834 INFO L226 Difference]: Without dead ends: 270 [2021-07-13 19:53:48,834 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 391.0ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:53:48,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-07-13 19:53:48,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 214. [2021-07-13 19:53:48,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.3896713615023475) internal successors, (509), 213 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:48,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 509 transitions. [2021-07-13 19:53:48,837 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 509 transitions. Word has length 19 [2021-07-13 19:53:48,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:48,837 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 509 transitions. [2021-07-13 19:53:48,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:48,837 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 509 transitions. [2021-07-13 19:53:48,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:48,837 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:48,837 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:49,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 642 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16598 [2021-07-13 19:53:49,038 INFO L430 AbstractCegarLoop]: === Iteration 660 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:49,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:49,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1273389436, now seen corresponding path program 639 times [2021-07-13 19:53:49,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:49,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404004262] [2021-07-13 19:53:49,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:49,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:49,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:49,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404004262] [2021-07-13 19:53:49,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404004262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:49,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966317680] [2021-07-13 19:53:49,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:49,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:53:49,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:49,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:49,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:49,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:49,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:49,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:53:49,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:49,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:49,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:49,275 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:49,296 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:53:49,296 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:49,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:49,297 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:53:49,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:49,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966317680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:49,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:49,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:53:49,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567835568] [2021-07-13 19:53:49,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:49,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:49,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:49,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:49,319 INFO L87 Difference]: Start difference. First operand 214 states and 509 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:49,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:49,532 INFO L93 Difference]: Finished difference Result 330 states and 737 transitions. [2021-07-13 19:53:49,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:53:49,532 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:49,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:49,533 INFO L225 Difference]: With dead ends: 330 [2021-07-13 19:53:49,533 INFO L226 Difference]: Without dead ends: 330 [2021-07-13 19:53:49,533 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 213.9ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:53:49,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-07-13 19:53:49,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 211. [2021-07-13 19:53:49,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.376190476190476) internal successors, (499), 210 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:49,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 499 transitions. [2021-07-13 19:53:49,535 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 499 transitions. Word has length 19 [2021-07-13 19:53:49,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:49,535 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 499 transitions. [2021-07-13 19:53:49,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:49,536 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 499 transitions. [2021-07-13 19:53:49,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:49,536 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:49,536 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:49,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 643 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16614 [2021-07-13 19:53:49,736 INFO L430 AbstractCegarLoop]: === Iteration 661 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:49,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:49,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1049283719, now seen corresponding path program 640 times [2021-07-13 19:53:49,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:49,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86848103] [2021-07-13 19:53:49,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:49,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:49,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:49,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:49,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86848103] [2021-07-13 19:53:49,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86848103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:49,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630948890] [2021-07-13 19:53:49,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:49,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:53:49,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:49,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:49,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:50,110 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:53:50,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:50,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:50,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:50,114 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:50,148 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:53:50,148 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:50,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:53:50,151 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:50,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:50,164 INFO L518 ElimStorePlain]: Eliminatee v_prenex_700 vanished before elimination [2021-07-13 19:53:50,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:53:50,165 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:53:50,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:50,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630948890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:50,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:50,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:53:50,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851628269] [2021-07-13 19:53:50,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:50,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:50,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:50,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:50,193 INFO L87 Difference]: Start difference. First operand 211 states and 499 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:50,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:50,435 INFO L93 Difference]: Finished difference Result 268 states and 604 transitions. [2021-07-13 19:53:50,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:53:50,435 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:50,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:50,435 INFO L225 Difference]: With dead ends: 268 [2021-07-13 19:53:50,435 INFO L226 Difference]: Without dead ends: 256 [2021-07-13 19:53:50,435 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 330.0ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:53:50,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-07-13 19:53:50,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 211. [2021-07-13 19:53:50,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.3714285714285714) internal successors, (498), 210 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:50,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 498 transitions. [2021-07-13 19:53:50,438 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 498 transitions. Word has length 19 [2021-07-13 19:53:50,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:50,438 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 498 transitions. [2021-07-13 19:53:50,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:50,438 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 498 transitions. [2021-07-13 19:53:50,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:50,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:50,438 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:50,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16618,644 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:50,639 INFO L430 AbstractCegarLoop]: === Iteration 662 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:50,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:50,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1963363643, now seen corresponding path program 641 times [2021-07-13 19:53:50,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:50,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878935445] [2021-07-13 19:53:50,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:50,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:50,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:50,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:50,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878935445] [2021-07-13 19:53:50,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878935445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:50,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096003977] [2021-07-13 19:53:50,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:50,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:53:50,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:50,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:50,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:50,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:50,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:50,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:53:50,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:50,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:50,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:50,854 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:50,874 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-07-13 19:53:50,874 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:50,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:50,875 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-07-13 19:53:50,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:50,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096003977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:50,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:50,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:53:50,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122528167] [2021-07-13 19:53:50,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:50,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:50,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:50,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:50,896 INFO L87 Difference]: Start difference. First operand 211 states and 498 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:51,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:51,316 INFO L93 Difference]: Finished difference Result 437 states and 918 transitions. [2021-07-13 19:53:51,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:53:51,316 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:51,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:51,317 INFO L225 Difference]: With dead ends: 437 [2021-07-13 19:53:51,317 INFO L226 Difference]: Without dead ends: 437 [2021-07-13 19:53:51,317 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 294.0ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:53:51,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-07-13 19:53:51,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 211. [2021-07-13 19:53:51,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.3714285714285714) internal successors, (498), 210 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:51,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 498 transitions. [2021-07-13 19:53:51,320 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 498 transitions. Word has length 19 [2021-07-13 19:53:51,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:51,320 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 498 transitions. [2021-07-13 19:53:51,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:51,320 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 498 transitions. [2021-07-13 19:53:51,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:51,320 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:51,320 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:51,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16644,645 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:51,521 INFO L430 AbstractCegarLoop]: === Iteration 663 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:51,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:51,521 INFO L82 PathProgramCache]: Analyzing trace with hash 980796118, now seen corresponding path program 642 times [2021-07-13 19:53:51,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:51,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143852814] [2021-07-13 19:53:51,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:51,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:51,588 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:51,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:51,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143852814] [2021-07-13 19:53:51,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143852814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:51,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032779194] [2021-07-13 19:53:51,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:51,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:53:51,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:51,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:51,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:51,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:51,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:51,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:51,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:51,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:51,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:53:51,752 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:51,781 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:53:51,781 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:51,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:53:51,782 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:53:51,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:51,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032779194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:51,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:51,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:53:51,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347083369] [2021-07-13 19:53:51,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:51,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:51,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:51,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:51,831 INFO L87 Difference]: Start difference. First operand 211 states and 498 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:52,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:52,497 INFO L93 Difference]: Finished difference Result 425 states and 880 transitions. [2021-07-13 19:53:52,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:53:52,497 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:52,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:52,498 INFO L225 Difference]: With dead ends: 425 [2021-07-13 19:53:52,498 INFO L226 Difference]: Without dead ends: 419 [2021-07-13 19:53:52,498 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 559.2ms TimeCoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:53:52,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-07-13 19:53:52,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 213. [2021-07-13 19:53:52,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.3820754716981134) internal successors, (505), 212 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:52,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 505 transitions. [2021-07-13 19:53:52,503 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 505 transitions. Word has length 19 [2021-07-13 19:53:52,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:52,504 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 505 transitions. [2021-07-13 19:53:52,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:52,504 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 505 transitions. [2021-07-13 19:53:52,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:52,504 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:52,504 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:52,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16648,646 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:52,705 INFO L430 AbstractCegarLoop]: === Iteration 664 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:52,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:52,705 INFO L82 PathProgramCache]: Analyzing trace with hash 727640853, now seen corresponding path program 643 times [2021-07-13 19:53:52,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:52,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890245031] [2021-07-13 19:53:52,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:52,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:52,773 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:52,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:52,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890245031] [2021-07-13 19:53:52,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890245031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:52,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886773269] [2021-07-13 19:53:52,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:52,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:52,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:52,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:53:52,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:52,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:52,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:52,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:52,905 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:52,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:52,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:52,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:53:52,909 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:52,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:53:52,912 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:52,946 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-07-13 19:53:52,946 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:52,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:53:52,947 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:53:52,989 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:52,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886773269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:52,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:52,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:53:52,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047249746] [2021-07-13 19:53:52,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:52,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:52,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:52,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:52,990 INFO L87 Difference]: Start difference. First operand 213 states and 505 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:53,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:53,332 INFO L93 Difference]: Finished difference Result 491 states and 1021 transitions. [2021-07-13 19:53:53,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:53:53,332 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:53,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:53,332 INFO L225 Difference]: With dead ends: 491 [2021-07-13 19:53:53,332 INFO L226 Difference]: Without dead ends: 491 [2021-07-13 19:53:53,333 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 260.2ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:53:53,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-07-13 19:53:53,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 213. [2021-07-13 19:53:53,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.3820754716981134) internal successors, (505), 212 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:53,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 505 transitions. [2021-07-13 19:53:53,335 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 505 transitions. Word has length 19 [2021-07-13 19:53:53,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:53,335 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 505 transitions. [2021-07-13 19:53:53,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:53,336 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 505 transitions. [2021-07-13 19:53:53,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:53,336 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:53,336 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:53,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16666,647 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:53,537 INFO L430 AbstractCegarLoop]: === Iteration 665 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:53,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:53,537 INFO L82 PathProgramCache]: Analyzing trace with hash 280303130, now seen corresponding path program 644 times [2021-07-13 19:53:53,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:53,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581241093] [2021-07-13 19:53:53,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:53,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:53,611 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:53,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:53,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581241093] [2021-07-13 19:53:53,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581241093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:53,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044120485] [2021-07-13 19:53:53,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:53,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:53,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:53,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:53,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:53,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:53,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:53,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:53:53,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:53,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:53,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:53,761 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:53,789 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:53:53,789 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:53,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:53:53,790 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:53:53,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:53,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044120485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:53,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:53,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:53:53,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876763783] [2021-07-13 19:53:53,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:53,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:53,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:53,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:53,832 INFO L87 Difference]: Start difference. First operand 213 states and 505 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:54,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:54,279 INFO L93 Difference]: Finished difference Result 397 states and 841 transitions. [2021-07-13 19:53:54,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:53:54,279 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:54,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:54,280 INFO L225 Difference]: With dead ends: 397 [2021-07-13 19:53:54,280 INFO L226 Difference]: Without dead ends: 397 [2021-07-13 19:53:54,280 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 395.5ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:53:54,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-07-13 19:53:54,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 212. [2021-07-13 19:53:54,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.374407582938389) internal successors, (501), 211 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:54,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 501 transitions. [2021-07-13 19:53:54,282 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 501 transitions. Word has length 19 [2021-07-13 19:53:54,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:54,283 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 501 transitions. [2021-07-13 19:53:54,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:54,283 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 501 transitions. [2021-07-13 19:53:54,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:54,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:54,283 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:54,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 648 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16676 [2021-07-13 19:53:54,484 INFO L430 AbstractCegarLoop]: === Iteration 666 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:54,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:54,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1702494115, now seen corresponding path program 645 times [2021-07-13 19:53:54,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:54,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852002014] [2021-07-13 19:53:54,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:54,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:54,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:54,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852002014] [2021-07-13 19:53:54,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852002014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:54,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834834426] [2021-07-13 19:53:54,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:54,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:53:54,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:54,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:54,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:54,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:54,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:54,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:53:54,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:54,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:53:54,730 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:54,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:53:54,733 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:54,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:54,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:54,736 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:54,771 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-07-13 19:53:54,772 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:54,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:53:54,773 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:53:54,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:54,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834834426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:54,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:54,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:53:54,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407972794] [2021-07-13 19:53:54,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:54,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:54,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:54,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:54,849 INFO L87 Difference]: Start difference. First operand 212 states and 501 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:55,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:55,562 INFO L93 Difference]: Finished difference Result 488 states and 999 transitions. [2021-07-13 19:53:55,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:53:55,563 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:55,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:55,563 INFO L225 Difference]: With dead ends: 488 [2021-07-13 19:53:55,563 INFO L226 Difference]: Without dead ends: 484 [2021-07-13 19:53:55,563 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 538.9ms TimeCoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:53:55,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-07-13 19:53:55,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 210. [2021-07-13 19:53:55,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.373205741626794) internal successors, (496), 209 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:55,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 496 transitions. [2021-07-13 19:53:55,566 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 496 transitions. Word has length 19 [2021-07-13 19:53:55,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:55,566 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 496 transitions. [2021-07-13 19:53:55,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:55,566 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 496 transitions. [2021-07-13 19:53:55,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:55,567 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:55,567 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:55,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 649 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16687 [2021-07-13 19:53:55,767 INFO L430 AbstractCegarLoop]: === Iteration 667 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:55,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:55,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1568541440, now seen corresponding path program 646 times [2021-07-13 19:53:55,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:55,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91433304] [2021-07-13 19:53:55,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:55,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:55,834 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:55,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:55,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91433304] [2021-07-13 19:53:55,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91433304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:55,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315016364] [2021-07-13 19:53:55,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:55,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:53:55,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:55,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:55,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:55,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:55,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:55,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:53:55,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:55,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:55,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:55,981 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:56,006 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:53:56,006 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:56,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:53:56,007 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:53:56,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:56,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315016364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:56,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:56,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:53:56,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909261365] [2021-07-13 19:53:56,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:56,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:56,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:56,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:56,057 INFO L87 Difference]: Start difference. First operand 210 states and 496 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:58,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:58,216 INFO L93 Difference]: Finished difference Result 698 states and 1341 transitions. [2021-07-13 19:53:58,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-07-13 19:53:58,216 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:58,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:58,217 INFO L225 Difference]: With dead ends: 698 [2021-07-13 19:53:58,217 INFO L226 Difference]: Without dead ends: 692 [2021-07-13 19:53:58,217 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2088 ImplicationChecksByTransitivity, 1954.9ms TimeCoverageRelationStatistics Valid=651, Invalid=5511, Unknown=0, NotChecked=0, Total=6162 [2021-07-13 19:53:58,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-07-13 19:53:58,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 221. [2021-07-13 19:53:58,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.440909090909091) internal successors, (537), 220 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:58,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 537 transitions. [2021-07-13 19:53:58,221 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 537 transitions. Word has length 19 [2021-07-13 19:53:58,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:58,221 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 537 transitions. [2021-07-13 19:53:58,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:58,221 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 537 transitions. [2021-07-13 19:53:58,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:58,221 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:58,221 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:58,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16700,650 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:58,422 INFO L430 AbstractCegarLoop]: === Iteration 668 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:58,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:58,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1315386175, now seen corresponding path program 647 times [2021-07-13 19:53:58,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:58,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57421368] [2021-07-13 19:53:58,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:58,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:58,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:58,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:58,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57421368] [2021-07-13 19:53:58,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57421368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:58,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342954727] [2021-07-13 19:53:58,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:58,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:53:58,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:58,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:58,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:58,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:58,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:58,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:53:58,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:58,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:53:58,666 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:58,711 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-07-13 19:53:58,711 INFO L518 ElimStorePlain]: Eliminatee v_prenex_702 vanished before elimination [2021-07-13 19:53:58,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:53:58,714 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:58,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:58,728 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:58,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:53:58,729 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:53:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:58,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342954727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:58,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:58,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:53:58,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735872078] [2021-07-13 19:53:58,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:58,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:58,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:58,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:58,781 INFO L87 Difference]: Start difference. First operand 221 states and 537 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:59,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:59,282 INFO L93 Difference]: Finished difference Result 445 states and 934 transitions. [2021-07-13 19:53:59,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:53:59,282 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:53:59,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:59,282 INFO L225 Difference]: With dead ends: 445 [2021-07-13 19:53:59,283 INFO L226 Difference]: Without dead ends: 439 [2021-07-13 19:53:59,283 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 459.8ms TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:53:59,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-07-13 19:53:59,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 221. [2021-07-13 19:53:59,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.440909090909091) internal successors, (537), 220 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:59,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 537 transitions. [2021-07-13 19:53:59,285 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 537 transitions. Word has length 19 [2021-07-13 19:53:59,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:59,285 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 537 transitions. [2021-07-13 19:53:59,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:59,286 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 537 transitions. [2021-07-13 19:53:59,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:53:59,286 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:59,286 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:59,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16710,651 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:59,486 INFO L430 AbstractCegarLoop]: === Iteration 669 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:59,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:59,487 INFO L82 PathProgramCache]: Analyzing trace with hash 868048452, now seen corresponding path program 648 times [2021-07-13 19:53:59,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:59,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248741221] [2021-07-13 19:53:59,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:59,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:59,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:59,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:59,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248741221] [2021-07-13 19:53:59,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248741221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:59,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454661354] [2021-07-13 19:53:59,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:59,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:53:59,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:59,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:59,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:59,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:59,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:59,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:53:59,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:59,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:59,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:53:59,703 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:59,729 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:53:59,729 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:53:59,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:53:59,729 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:53:59,771 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:59,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454661354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:59,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:59,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:53:59,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317720001] [2021-07-13 19:53:59,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:59,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:59,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:59,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:59,772 INFO L87 Difference]: Start difference. First operand 221 states and 537 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:01,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:01,067 INFO L93 Difference]: Finished difference Result 585 states and 1189 transitions. [2021-07-13 19:54:01,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 19:54:01,067 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:01,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:01,068 INFO L225 Difference]: With dead ends: 585 [2021-07-13 19:54:01,068 INFO L226 Difference]: Without dead ends: 585 [2021-07-13 19:54:01,068 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1110.2ms TimeCoverageRelationStatistics Valid=370, Invalid=2386, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 19:54:01,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-07-13 19:54:01,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 217. [2021-07-13 19:54:01,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.412037037037037) internal successors, (521), 216 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:01,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 521 transitions. [2021-07-13 19:54:01,072 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 521 transitions. Word has length 19 [2021-07-13 19:54:01,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:01,072 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 521 transitions. [2021-07-13 19:54:01,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:01,072 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 521 transitions. [2021-07-13 19:54:01,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:01,072 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:01,072 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:01,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 652 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16727 [2021-07-13 19:54:01,273 INFO L430 AbstractCegarLoop]: === Iteration 670 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:01,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:01,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1114748793, now seen corresponding path program 649 times [2021-07-13 19:54:01,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:01,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800610574] [2021-07-13 19:54:01,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:01,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:01,341 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:01,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:01,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800610574] [2021-07-13 19:54:01,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800610574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:01,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510650236] [2021-07-13 19:54:01,341 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:01,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:01,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:01,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:01,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:01,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:01,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:01,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:01,521 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:54:01,521 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:01,564 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-07-13 19:54:01,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:54:01,567 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:01,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:01,581 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:01,581 INFO L518 ElimStorePlain]: Eliminatee v_prenex_706 vanished before elimination [2021-07-13 19:54:01,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:54:01,582 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:54:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:01,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510650236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:01,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:01,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:54:01,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965008666] [2021-07-13 19:54:01,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:01,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:01,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:01,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:01,656 INFO L87 Difference]: Start difference. First operand 217 states and 521 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:02,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:02,485 INFO L93 Difference]: Finished difference Result 457 states and 934 transitions. [2021-07-13 19:54:02,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:54:02,486 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:02,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:02,486 INFO L225 Difference]: With dead ends: 457 [2021-07-13 19:54:02,486 INFO L226 Difference]: Without dead ends: 453 [2021-07-13 19:54:02,486 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 724.9ms TimeCoverageRelationStatistics Valid=207, Invalid=1685, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:54:02,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-07-13 19:54:02,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 216. [2021-07-13 19:54:02,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.4093023255813955) internal successors, (518), 215 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:02,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 518 transitions. [2021-07-13 19:54:02,489 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 518 transitions. Word has length 19 [2021-07-13 19:54:02,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:02,489 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 518 transitions. [2021-07-13 19:54:02,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:02,489 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 518 transitions. [2021-07-13 19:54:02,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:02,490 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:02,490 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:02,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16735,653 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:02,690 INFO L430 AbstractCegarLoop]: === Iteration 671 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:02,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:02,690 INFO L82 PathProgramCache]: Analyzing trace with hash 332818650, now seen corresponding path program 650 times [2021-07-13 19:54:02,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:02,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126062798] [2021-07-13 19:54:02,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:02,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:02,759 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:02,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:02,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126062798] [2021-07-13 19:54:02,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126062798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:02,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618820529] [2021-07-13 19:54:02,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:02,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:54:02,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:02,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:02,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:02,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:02,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:02,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:54:02,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:02,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:02,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:02,913 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:02,941 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:54:02,941 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:02,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:02,942 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:54:02,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:02,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618820529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:02,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:02,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:54:02,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207910099] [2021-07-13 19:54:02,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:02,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:02,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:02,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:02,964 INFO L87 Difference]: Start difference. First operand 216 states and 518 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:03,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:03,488 INFO L93 Difference]: Finished difference Result 465 states and 973 transitions. [2021-07-13 19:54:03,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:54:03,488 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:03,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:03,488 INFO L225 Difference]: With dead ends: 465 [2021-07-13 19:54:03,488 INFO L226 Difference]: Without dead ends: 465 [2021-07-13 19:54:03,489 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 429.1ms TimeCoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:54:03,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-07-13 19:54:03,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 211. [2021-07-13 19:54:03,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.380952380952381) internal successors, (500), 210 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:03,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 500 transitions. [2021-07-13 19:54:03,491 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 500 transitions. Word has length 19 [2021-07-13 19:54:03,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:03,492 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 500 transitions. [2021-07-13 19:54:03,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:03,492 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 500 transitions. [2021-07-13 19:54:03,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:03,492 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:03,492 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:03,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16755,654 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:03,692 INFO L430 AbstractCegarLoop]: === Iteration 672 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:03,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:03,693 INFO L82 PathProgramCache]: Analyzing trace with hash -39037637, now seen corresponding path program 651 times [2021-07-13 19:54:03,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:03,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990585537] [2021-07-13 19:54:03,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:03,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:03,762 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:03,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:03,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990585537] [2021-07-13 19:54:03,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990585537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:03,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932050585] [2021-07-13 19:54:03,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:03,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:54:03,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:03,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:03,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:04,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:04,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:04,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:04,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:04,030 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:54:04,031 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:04,066 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:54:04,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:54:04,069 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:04,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:04,081 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:04,082 INFO L518 ElimStorePlain]: Eliminatee v_prenex_711 vanished before elimination [2021-07-13 19:54:04,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:54:04,082 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:54:04,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:04,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932050585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:04,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:04,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:54:04,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912616656] [2021-07-13 19:54:04,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:04,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:04,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:04,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:04,110 INFO L87 Difference]: Start difference. First operand 211 states and 500 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:04,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:04,689 INFO L93 Difference]: Finished difference Result 353 states and 752 transitions. [2021-07-13 19:54:04,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:54:04,690 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:04,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:04,690 INFO L225 Difference]: With dead ends: 353 [2021-07-13 19:54:04,690 INFO L226 Difference]: Without dead ends: 345 [2021-07-13 19:54:04,690 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 559.7ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:54:04,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-07-13 19:54:04,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 210. [2021-07-13 19:54:04,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.3779904306220097) internal successors, (497), 209 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:04,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 497 transitions. [2021-07-13 19:54:04,693 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 497 transitions. Word has length 19 [2021-07-13 19:54:04,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:04,693 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 497 transitions. [2021-07-13 19:54:04,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:04,693 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 497 transitions. [2021-07-13 19:54:04,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:04,693 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:04,693 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:04,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16759,655 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:04,894 INFO L430 AbstractCegarLoop]: === Iteration 673 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:04,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:04,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1686190058, now seen corresponding path program 652 times [2021-07-13 19:54:04,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:04,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355392246] [2021-07-13 19:54:04,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:04,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:04,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:54:04,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:04,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355392246] [2021-07-13 19:54:04,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355392246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:04,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691362205] [2021-07-13 19:54:04,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:04,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:54:04,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:04,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:04,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:05,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:05,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:05,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:05,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:05,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:05,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:54:05,120 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:05,146 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:54:05,146 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:05,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:54:05,147 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:54:05,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:05,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691362205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:05,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:05,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:54:05,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712254604] [2021-07-13 19:54:05,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:05,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:05,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:05,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:05,198 INFO L87 Difference]: Start difference. First operand 210 states and 497 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:07,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:07,280 INFO L93 Difference]: Finished difference Result 483 states and 983 transitions. [2021-07-13 19:54:07,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 19:54:07,280 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:07,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:07,281 INFO L225 Difference]: With dead ends: 483 [2021-07-13 19:54:07,281 INFO L226 Difference]: Without dead ends: 477 [2021-07-13 19:54:07,281 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 1950.0ms TimeCoverageRelationStatistics Valid=545, Invalid=2995, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 19:54:07,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-07-13 19:54:07,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 219. [2021-07-13 19:54:07,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.426605504587156) internal successors, (529), 218 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:07,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 529 transitions. [2021-07-13 19:54:07,284 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 529 transitions. Word has length 19 [2021-07-13 19:54:07,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:07,284 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 529 transitions. [2021-07-13 19:54:07,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:07,284 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 529 transitions. [2021-07-13 19:54:07,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:07,285 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:07,285 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:07,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 656 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16775 [2021-07-13 19:54:07,485 INFO L430 AbstractCegarLoop]: === Iteration 674 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:07,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:07,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1939345323, now seen corresponding path program 653 times [2021-07-13 19:54:07,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:07,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600235327] [2021-07-13 19:54:07,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:07,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:07,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:54:07,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:07,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600235327] [2021-07-13 19:54:07,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600235327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:07,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489209292] [2021-07-13 19:54:07,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:07,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:54:07,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:07,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:07,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:07,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:07,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:07,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:54:07,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:07,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:54:07,741 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:07,781 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-07-13 19:54:07,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:54:07,784 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:07,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:07,799 INFO L518 ElimStorePlain]: Eliminatee v_prenex_715 vanished before elimination [2021-07-13 19:54:07,799 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:07,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:54:07,800 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:54:07,852 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:07,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489209292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:07,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:07,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:54:07,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781493278] [2021-07-13 19:54:07,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:07,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:07,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:07,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:07,853 INFO L87 Difference]: Start difference. First operand 219 states and 529 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:08,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:08,280 INFO L93 Difference]: Finished difference Result 336 states and 723 transitions. [2021-07-13 19:54:08,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:54:08,280 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:08,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:08,280 INFO L225 Difference]: With dead ends: 336 [2021-07-13 19:54:08,280 INFO L226 Difference]: Without dead ends: 330 [2021-07-13 19:54:08,281 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 401.5ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:54:08,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-07-13 19:54:08,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 219. [2021-07-13 19:54:08,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.426605504587156) internal successors, (529), 218 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:08,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 529 transitions. [2021-07-13 19:54:08,283 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 529 transitions. Word has length 19 [2021-07-13 19:54:08,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:08,283 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 529 transitions. [2021-07-13 19:54:08,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:08,283 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 529 transitions. [2021-07-13 19:54:08,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:08,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:08,283 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:08,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 657 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16785 [2021-07-13 19:54:08,484 INFO L430 AbstractCegarLoop]: === Iteration 675 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:08,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:08,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1908284250, now seen corresponding path program 654 times [2021-07-13 19:54:08,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:08,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718930224] [2021-07-13 19:54:08,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:08,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:08,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:54:08,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:08,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718930224] [2021-07-13 19:54:08,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718930224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:08,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868461743] [2021-07-13 19:54:08,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:08,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:54:08,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:08,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:08,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:08,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:08,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:08,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:54:08,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:08,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:08,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:08,714 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:08,740 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:54:08,740 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:08,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:54:08,741 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:54:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:08,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868461743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:08,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:08,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:54:08,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280485429] [2021-07-13 19:54:08,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:08,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:08,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:08,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:08,783 INFO L87 Difference]: Start difference. First operand 219 states and 529 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:09,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:09,911 INFO L93 Difference]: Finished difference Result 440 states and 916 transitions. [2021-07-13 19:54:09,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:54:09,912 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:09,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:09,912 INFO L225 Difference]: With dead ends: 440 [2021-07-13 19:54:09,912 INFO L226 Difference]: Without dead ends: 436 [2021-07-13 19:54:09,912 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1083.6ms TimeCoverageRelationStatistics Valid=290, Invalid=1516, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:54:09,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-07-13 19:54:09,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 211. [2021-07-13 19:54:09,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.380952380952381) internal successors, (500), 210 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:09,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 500 transitions. [2021-07-13 19:54:09,915 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 500 transitions. Word has length 19 [2021-07-13 19:54:09,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:09,915 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 500 transitions. [2021-07-13 19:54:09,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:09,915 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 500 transitions. [2021-07-13 19:54:09,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:09,916 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:09,916 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:10,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 658 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16796 [2021-07-13 19:54:10,116 INFO L430 AbstractCegarLoop]: === Iteration 676 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:10,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:10,116 INFO L82 PathProgramCache]: Analyzing trace with hash -74512995, now seen corresponding path program 655 times [2021-07-13 19:54:10,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:10,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291991087] [2021-07-13 19:54:10,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:10,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:10,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:54:10,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:10,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291991087] [2021-07-13 19:54:10,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291991087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:10,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294197558] [2021-07-13 19:54:10,185 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:10,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:10,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:10,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:10,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:10,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:10,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:10,412 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:54:10,413 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:10,451 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-07-13 19:54:10,451 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:10,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:54:10,454 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:10,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:10,468 INFO L518 ElimStorePlain]: Eliminatee v_prenex_718 vanished before elimination [2021-07-13 19:54:10,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:54:10,469 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:54:10,543 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:10,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294197558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:10,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:10,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:54:10,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936037334] [2021-07-13 19:54:10,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:10,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:10,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:10,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:10,544 INFO L87 Difference]: Start difference. First operand 211 states and 500 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:11,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:11,147 INFO L93 Difference]: Finished difference Result 307 states and 660 transitions. [2021-07-13 19:54:11,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:54:11,147 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:11,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:11,147 INFO L225 Difference]: With dead ends: 307 [2021-07-13 19:54:11,147 INFO L226 Difference]: Without dead ends: 303 [2021-07-13 19:54:11,148 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 605.7ms TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:54:11,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-07-13 19:54:11,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 210. [2021-07-13 19:54:11,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.3779904306220097) internal successors, (497), 209 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:11,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 497 transitions. [2021-07-13 19:54:11,150 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 497 transitions. Word has length 19 [2021-07-13 19:54:11,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:11,150 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 497 transitions. [2021-07-13 19:54:11,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:11,150 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 497 transitions. [2021-07-13 19:54:11,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:11,150 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:11,150 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:11,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 659 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16804 [2021-07-13 19:54:11,351 INFO L430 AbstractCegarLoop]: === Iteration 677 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:11,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:11,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1373054448, now seen corresponding path program 656 times [2021-07-13 19:54:11,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:11,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645631868] [2021-07-13 19:54:11,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:11,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:11,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:54:11,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:11,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645631868] [2021-07-13 19:54:11,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645631868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:11,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10950011] [2021-07-13 19:54:11,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:11,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:54:11,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:11,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:11,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:11,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:11,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:11,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:54:11,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:11,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:11,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:11,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:11,617 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:54:11,617 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:11,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:11,617 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:54:11,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:11,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10950011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:11,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:11,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:54:11,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121759686] [2021-07-13 19:54:11,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:11,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:11,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:11,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:11,640 INFO L87 Difference]: Start difference. First operand 210 states and 497 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:12,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:12,512 INFO L93 Difference]: Finished difference Result 327 states and 718 transitions. [2021-07-13 19:54:12,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:54:12,512 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:12,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:12,512 INFO L225 Difference]: With dead ends: 327 [2021-07-13 19:54:12,512 INFO L226 Difference]: Without dead ends: 327 [2021-07-13 19:54:12,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 843.7ms TimeCoverageRelationStatistics Valid=229, Invalid=1103, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:54:12,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-07-13 19:54:12,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 204. [2021-07-13 19:54:12,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.3596059113300494) internal successors, (479), 203 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:12,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 479 transitions. [2021-07-13 19:54:12,515 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 479 transitions. Word has length 19 [2021-07-13 19:54:12,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:12,515 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 479 transitions. [2021-07-13 19:54:12,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:12,515 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 479 transitions. [2021-07-13 19:54:12,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:12,515 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:12,515 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:12,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16824,660 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:12,716 INFO L430 AbstractCegarLoop]: === Iteration 678 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:12,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:12,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1960799770, now seen corresponding path program 657 times [2021-07-13 19:54:12,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:12,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183870587] [2021-07-13 19:54:12,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:12,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:12,786 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:54:12,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:12,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183870587] [2021-07-13 19:54:12,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183870587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:12,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343035604] [2021-07-13 19:54:12,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:12,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:54:12,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:12,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:12,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:12,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:12,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:12,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:12,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:12,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:12,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:54:12,950 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:12,970 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:54:12,970 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:12,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:12,971 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:54:12,993 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:12,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343035604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:12,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:12,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:54:12,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175840683] [2021-07-13 19:54:12,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:12,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:12,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:12,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:12,994 INFO L87 Difference]: Start difference. First operand 204 states and 479 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:13,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:13,322 INFO L93 Difference]: Finished difference Result 296 states and 653 transitions. [2021-07-13 19:54:13,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:54:13,323 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:13,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:13,323 INFO L225 Difference]: With dead ends: 296 [2021-07-13 19:54:13,323 INFO L226 Difference]: Without dead ends: 296 [2021-07-13 19:54:13,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 277.9ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:54:13,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-07-13 19:54:13,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 198. [2021-07-13 19:54:13,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.3451776649746194) internal successors, (462), 197 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:13,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 462 transitions. [2021-07-13 19:54:13,326 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 462 transitions. Word has length 19 [2021-07-13 19:54:13,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:13,326 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 462 transitions. [2021-07-13 19:54:13,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:13,326 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 462 transitions. [2021-07-13 19:54:13,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:13,326 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:13,326 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:13,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16828,661 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:13,527 INFO L430 AbstractCegarLoop]: === Iteration 679 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:13,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:13,527 INFO L82 PathProgramCache]: Analyzing trace with hash -11494371, now seen corresponding path program 658 times [2021-07-13 19:54:13,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:13,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131976030] [2021-07-13 19:54:13,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:13,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:13,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:54:13,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:13,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131976030] [2021-07-13 19:54:13,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131976030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:13,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590782595] [2021-07-13 19:54:13,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:13,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:54:13,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:13,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:13,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:13,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:13,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:13,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:13,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:13,876 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:54:13,876 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:13,911 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:54:13,911 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:13,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:54:13,914 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:13,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:13,927 INFO L518 ElimStorePlain]: Eliminatee v_prenex_722 vanished before elimination [2021-07-13 19:54:13,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:54:13,928 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:54:13,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:13,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590782595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:13,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:13,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 19:54:13,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489761735] [2021-07-13 19:54:13,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:13,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:13,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:13,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:13,956 INFO L87 Difference]: Start difference. First operand 198 states and 462 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:14,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:14,349 INFO L93 Difference]: Finished difference Result 246 states and 547 transitions. [2021-07-13 19:54:14,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:54:14,350 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:14,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:14,350 INFO L225 Difference]: With dead ends: 246 [2021-07-13 19:54:14,350 INFO L226 Difference]: Without dead ends: 234 [2021-07-13 19:54:14,350 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 452.5ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:54:14,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-07-13 19:54:14,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 198. [2021-07-13 19:54:14,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.33502538071066) internal successors, (460), 197 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:14,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 460 transitions. [2021-07-13 19:54:14,352 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 460 transitions. Word has length 19 [2021-07-13 19:54:14,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:14,352 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 460 transitions. [2021-07-13 19:54:14,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:14,353 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 460 transitions. [2021-07-13 19:54:14,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:14,353 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:14,353 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:14,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16832,662 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:14,553 INFO L430 AbstractCegarLoop]: === Iteration 680 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:14,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:14,554 INFO L82 PathProgramCache]: Analyzing trace with hash 496348608, now seen corresponding path program 659 times [2021-07-13 19:54:14,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:14,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247660329] [2021-07-13 19:54:14,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:14,635 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:14,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:14,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247660329] [2021-07-13 19:54:14,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247660329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:14,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68070194] [2021-07-13 19:54:14,635 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:14,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:54:14,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:14,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:14,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:14,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:14,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:14,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:54:14,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:14,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:14,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:14,831 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:14,857 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:54:14,857 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:14,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:54:14,858 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:54:14,909 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:14,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68070194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:14,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:14,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:54:14,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619251844] [2021-07-13 19:54:14,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:54:14,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:14,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:54:14,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:54:14,910 INFO L87 Difference]: Start difference. First operand 198 states and 460 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:16,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:16,217 INFO L93 Difference]: Finished difference Result 329 states and 702 transitions. [2021-07-13 19:54:16,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:54:16,217 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:16,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:16,218 INFO L225 Difference]: With dead ends: 329 [2021-07-13 19:54:16,218 INFO L226 Difference]: Without dead ends: 323 [2021-07-13 19:54:16,218 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1153.7ms TimeCoverageRelationStatistics Valid=228, Invalid=1664, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:54:16,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-07-13 19:54:16,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 206. [2021-07-13 19:54:16,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.3658536585365852) internal successors, (485), 205 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:16,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 485 transitions. [2021-07-13 19:54:16,220 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 485 transitions. Word has length 19 [2021-07-13 19:54:16,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:16,220 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 485 transitions. [2021-07-13 19:54:16,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:16,220 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 485 transitions. [2021-07-13 19:54:16,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:16,221 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:16,221 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:16,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16859,663 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:16,421 INFO L430 AbstractCegarLoop]: === Iteration 681 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:16,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:16,421 INFO L82 PathProgramCache]: Analyzing trace with hash 243193343, now seen corresponding path program 660 times [2021-07-13 19:54:16,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:16,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461827707] [2021-07-13 19:54:16,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:16,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:16,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:16,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:16,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461827707] [2021-07-13 19:54:16,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461827707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:16,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890879425] [2021-07-13 19:54:16,510 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:16,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:54:16,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:16,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:16,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:16,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:54:16,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:16,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:16,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:54:16,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:16,804 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-07-13 19:54:16,805 INFO L518 ElimStorePlain]: Eliminatee v_prenex_725 vanished before elimination [2021-07-13 19:54:16,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:54:16,807 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:16,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:16,822 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:16,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:54:16,823 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:54:16,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:16,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890879425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:16,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:16,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:54:16,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537131706] [2021-07-13 19:54:16,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:54:16,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:16,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:54:16,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:54:16,883 INFO L87 Difference]: Start difference. First operand 206 states and 485 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:17,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:17,252 INFO L93 Difference]: Finished difference Result 311 states and 665 transitions. [2021-07-13 19:54:17,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:54:17,252 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:17,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:17,252 INFO L225 Difference]: With dead ends: 311 [2021-07-13 19:54:17,252 INFO L226 Difference]: Without dead ends: 311 [2021-07-13 19:54:17,252 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 368.4ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:54:17,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-07-13 19:54:17,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 206. [2021-07-13 19:54:17,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.3658536585365852) internal successors, (485), 205 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:17,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 485 transitions. [2021-07-13 19:54:17,255 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 485 transitions. Word has length 19 [2021-07-13 19:54:17,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:17,255 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 485 transitions. [2021-07-13 19:54:17,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:17,255 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 485 transitions. [2021-07-13 19:54:17,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:17,255 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:17,255 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:17,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 664 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16869 [2021-07-13 19:54:17,456 INFO L430 AbstractCegarLoop]: === Iteration 682 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:17,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:17,456 INFO L82 PathProgramCache]: Analyzing trace with hash -204144380, now seen corresponding path program 661 times [2021-07-13 19:54:17,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:17,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352661103] [2021-07-13 19:54:17,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:17,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:17,537 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:17,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:17,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352661103] [2021-07-13 19:54:17,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352661103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:17,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084469829] [2021-07-13 19:54:17,538 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:17,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:17,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:17,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:17,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:17,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:17,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:54:17,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:17,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:17,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:17,716 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:17,742 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:54:17,742 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:17,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:54:17,743 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:54:17,792 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:17,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084469829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:17,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:17,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:54:17,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562765606] [2021-07-13 19:54:17,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:54:17,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:17,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:54:17,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:54:17,793 INFO L87 Difference]: Start difference. First operand 206 states and 485 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:18,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:18,829 INFO L93 Difference]: Finished difference Result 338 states and 726 transitions. [2021-07-13 19:54:18,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:54:18,829 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:18,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:18,830 INFO L225 Difference]: With dead ends: 338 [2021-07-13 19:54:18,830 INFO L226 Difference]: Without dead ends: 338 [2021-07-13 19:54:18,830 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 942.3ms TimeCoverageRelationStatistics Valid=196, Invalid=1286, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:54:18,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-07-13 19:54:18,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 206. [2021-07-13 19:54:18,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.3658536585365852) internal successors, (485), 205 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:18,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 485 transitions. [2021-07-13 19:54:18,832 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 485 transitions. Word has length 19 [2021-07-13 19:54:18,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:18,832 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 485 transitions. [2021-07-13 19:54:18,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:18,832 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 485 transitions. [2021-07-13 19:54:18,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:18,833 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:18,833 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:19,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16886,665 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:19,033 INFO L430 AbstractCegarLoop]: === Iteration 683 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:19,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:19,034 INFO L82 PathProgramCache]: Analyzing trace with hash 2108025671, now seen corresponding path program 662 times [2021-07-13 19:54:19,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:19,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93054105] [2021-07-13 19:54:19,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:19,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:19,114 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:19,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:19,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93054105] [2021-07-13 19:54:19,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93054105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:19,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032883152] [2021-07-13 19:54:19,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:19,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:54:19,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:19,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:19,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:19,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:54:19,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:19,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:19,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:19,336 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:19,377 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-07-13 19:54:19,377 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:19,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:54:19,380 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:19,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:19,394 INFO L518 ElimStorePlain]: Eliminatee v_prenex_728 vanished before elimination [2021-07-13 19:54:19,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:54:19,395 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:54:19,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:19,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032883152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:19,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:19,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:54:19,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072005544] [2021-07-13 19:54:19,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:54:19,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:19,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:54:19,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:54:19,473 INFO L87 Difference]: Start difference. First operand 206 states and 485 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:20,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:20,029 INFO L93 Difference]: Finished difference Result 315 states and 667 transitions. [2021-07-13 19:54:20,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:54:20,030 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:20,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:20,030 INFO L225 Difference]: With dead ends: 315 [2021-07-13 19:54:20,030 INFO L226 Difference]: Without dead ends: 311 [2021-07-13 19:54:20,030 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 553.6ms TimeCoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:54:20,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-07-13 19:54:20,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 205. [2021-07-13 19:54:20,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.3627450980392157) internal successors, (482), 204 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:20,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 482 transitions. [2021-07-13 19:54:20,032 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 482 transitions. Word has length 19 [2021-07-13 19:54:20,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:20,033 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 482 transitions. [2021-07-13 19:54:20,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:20,033 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 482 transitions. [2021-07-13 19:54:20,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:20,033 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:20,033 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:20,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 666 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16894 [2021-07-13 19:54:20,233 INFO L430 AbstractCegarLoop]: === Iteration 684 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:20,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:20,234 INFO L82 PathProgramCache]: Analyzing trace with hash -739374182, now seen corresponding path program 663 times [2021-07-13 19:54:20,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:20,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013205641] [2021-07-13 19:54:20,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:20,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:20,317 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:20,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:20,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013205641] [2021-07-13 19:54:20,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013205641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:20,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940849802] [2021-07-13 19:54:20,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:20,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:54:20,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:20,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:20,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:20,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:20,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:20,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:54:20,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:20,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:20,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:20,511 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:20,532 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:54:20,532 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:20,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:20,533 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:54:20,556 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:20,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940849802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:20,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:20,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:54:20,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002689038] [2021-07-13 19:54:20,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:54:20,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:20,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:54:20,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:54:20,557 INFO L87 Difference]: Start difference. First operand 205 states and 482 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:21,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:21,464 INFO L93 Difference]: Finished difference Result 311 states and 685 transitions. [2021-07-13 19:54:21,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:54:21,464 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:21,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:21,464 INFO L225 Difference]: With dead ends: 311 [2021-07-13 19:54:21,464 INFO L226 Difference]: Without dead ends: 311 [2021-07-13 19:54:21,464 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 800.2ms TimeCoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:54:21,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-07-13 19:54:21,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 205. [2021-07-13 19:54:21,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.3627450980392157) internal successors, (482), 204 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:21,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 482 transitions. [2021-07-13 19:54:21,467 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 482 transitions. Word has length 19 [2021-07-13 19:54:21,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:21,467 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 482 transitions. [2021-07-13 19:54:21,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:21,467 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 482 transitions. [2021-07-13 19:54:21,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:21,467 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:21,467 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:21,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16914,667 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:21,668 INFO L430 AbstractCegarLoop]: === Iteration 685 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:21,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:21,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1111230469, now seen corresponding path program 664 times [2021-07-13 19:54:21,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:21,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424320446] [2021-07-13 19:54:21,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:21,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:21,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:21,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:21,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424320446] [2021-07-13 19:54:21,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424320446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:21,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154338520] [2021-07-13 19:54:21,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:21,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:54:21,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:21,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:21,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:22,057 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:54:22,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:22,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:22,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:22,061 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:22,099 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:54:22,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:54:22,102 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:22,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:22,115 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:22,115 INFO L518 ElimStorePlain]: Eliminatee v_prenex_733 vanished before elimination [2021-07-13 19:54:22,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:54:22,116 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:54:22,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:22,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154338520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:22,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:22,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:54:22,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69981970] [2021-07-13 19:54:22,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:54:22,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:22,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:54:22,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:54:22,145 INFO L87 Difference]: Start difference. First operand 205 states and 482 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:22,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:22,555 INFO L93 Difference]: Finished difference Result 266 states and 588 transitions. [2021-07-13 19:54:22,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:54:22,555 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:22,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:22,556 INFO L225 Difference]: With dead ends: 266 [2021-07-13 19:54:22,556 INFO L226 Difference]: Without dead ends: 256 [2021-07-13 19:54:22,556 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 458.7ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:54:22,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-07-13 19:54:22,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 201. [2021-07-13 19:54:22,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.36) internal successors, (472), 200 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:22,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 472 transitions. [2021-07-13 19:54:22,558 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 472 transitions. Word has length 19 [2021-07-13 19:54:22,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:22,558 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 472 transitions. [2021-07-13 19:54:22,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:22,558 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 472 transitions. [2021-07-13 19:54:22,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:22,559 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:22,559 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:22,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16918,668 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:22,759 INFO L430 AbstractCegarLoop]: === Iteration 686 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:22,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:22,759 INFO L82 PathProgramCache]: Analyzing trace with hash -151628860, now seen corresponding path program 665 times [2021-07-13 19:54:22,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:22,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651989613] [2021-07-13 19:54:22,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:22,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:22,843 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:22,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:22,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651989613] [2021-07-13 19:54:22,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651989613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:22,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34781059] [2021-07-13 19:54:22,843 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:22,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:54:22,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:22,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:22,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:23,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:23,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:23,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:23,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:23,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:23,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:54:23,026 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:23,051 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:54:23,051 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:23,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:23,052 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:54:23,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:23,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34781059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:23,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:23,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:54:23,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187405889] [2021-07-13 19:54:23,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:54:23,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:23,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:54:23,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:54:23,076 INFO L87 Difference]: Start difference. First operand 201 states and 472 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:23,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:23,517 INFO L93 Difference]: Finished difference Result 287 states and 638 transitions. [2021-07-13 19:54:23,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:54:23,518 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:23,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:23,518 INFO L225 Difference]: With dead ends: 287 [2021-07-13 19:54:23,518 INFO L226 Difference]: Without dead ends: 287 [2021-07-13 19:54:23,518 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 456.0ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:54:23,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-07-13 19:54:23,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 201. [2021-07-13 19:54:23,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.36) internal successors, (472), 200 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:23,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 472 transitions. [2021-07-13 19:54:23,520 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 472 transitions. Word has length 19 [2021-07-13 19:54:23,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:23,521 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 472 transitions. [2021-07-13 19:54:23,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:23,521 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 472 transitions. [2021-07-13 19:54:23,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:23,521 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:23,521 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:23,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 669 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16934 [2021-07-13 19:54:23,721 INFO L430 AbstractCegarLoop]: === Iteration 687 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:23,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:23,722 INFO L82 PathProgramCache]: Analyzing trace with hash -2123923001, now seen corresponding path program 666 times [2021-07-13 19:54:23,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:23,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226096467] [2021-07-13 19:54:23,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:23,808 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:23,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:23,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226096467] [2021-07-13 19:54:23,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226096467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:23,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632003774] [2021-07-13 19:54:23,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:23,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:54:23,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:23,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:23,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:24,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:24,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:24,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:24,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:24,148 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:54:24,148 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:24,184 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:54:24,184 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:24,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:54:24,187 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:24,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:24,200 INFO L518 ElimStorePlain]: Eliminatee v_prenex_740 vanished before elimination [2021-07-13 19:54:24,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:54:24,201 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:54:24,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:24,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632003774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:24,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:24,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:54:24,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713315031] [2021-07-13 19:54:24,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:54:24,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:24,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:54:24,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:54:24,231 INFO L87 Difference]: Start difference. First operand 201 states and 472 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:24,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:24,533 INFO L93 Difference]: Finished difference Result 255 states and 568 transitions. [2021-07-13 19:54:24,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:54:24,533 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:24,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:24,534 INFO L225 Difference]: With dead ends: 255 [2021-07-13 19:54:24,534 INFO L226 Difference]: Without dead ends: 249 [2021-07-13 19:54:24,534 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 408.2ms TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:54:24,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-07-13 19:54:24,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 199. [2021-07-13 19:54:24,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.3535353535353534) internal successors, (466), 198 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:24,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 466 transitions. [2021-07-13 19:54:24,536 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 466 transitions. Word has length 19 [2021-07-13 19:54:24,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:24,536 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 466 transitions. [2021-07-13 19:54:24,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:24,536 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 466 transitions. [2021-07-13 19:54:24,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:24,537 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:24,537 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:24,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 670 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16938 [2021-07-13 19:54:24,737 INFO L430 AbstractCegarLoop]: === Iteration 688 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:24,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:24,737 INFO L82 PathProgramCache]: Analyzing trace with hash 888606938, now seen corresponding path program 667 times [2021-07-13 19:54:24,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:24,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82860213] [2021-07-13 19:54:24,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:24,821 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:24,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:24,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82860213] [2021-07-13 19:54:24,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82860213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:24,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844808897] [2021-07-13 19:54:24,822 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:24,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:24,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:24,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:24,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:24,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:24,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:24,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:25,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:25,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:54:25,000 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:25,022 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:54:25,022 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:25,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:25,023 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:54:25,046 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:25,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844808897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:25,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:25,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:54:25,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752707606] [2021-07-13 19:54:25,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:54:25,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:25,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:54:25,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:54:25,046 INFO L87 Difference]: Start difference. First operand 199 states and 466 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:25,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:25,282 INFO L93 Difference]: Finished difference Result 275 states and 611 transitions. [2021-07-13 19:54:25,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:54:25,283 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:25,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:25,283 INFO L225 Difference]: With dead ends: 275 [2021-07-13 19:54:25,283 INFO L226 Difference]: Without dead ends: 275 [2021-07-13 19:54:25,283 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 232.5ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:54:25,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-07-13 19:54:25,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 195. [2021-07-13 19:54:25,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.3350515463917527) internal successors, (453), 194 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:25,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 453 transitions. [2021-07-13 19:54:25,285 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 453 transitions. Word has length 19 [2021-07-13 19:54:25,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:25,285 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 453 transitions. [2021-07-13 19:54:25,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:25,286 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 453 transitions. [2021-07-13 19:54:25,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:25,286 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:25,286 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:25,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16964,671 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:25,486 INFO L430 AbstractCegarLoop]: === Iteration 689 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:25,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:25,487 INFO L82 PathProgramCache]: Analyzing trace with hash 842346875, now seen corresponding path program 668 times [2021-07-13 19:54:25,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:25,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186177900] [2021-07-13 19:54:25,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:25,570 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:25,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:25,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186177900] [2021-07-13 19:54:25,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186177900] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:25,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828662737] [2021-07-13 19:54:25,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:25,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:54:25,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:25,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:25,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:25,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:25,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:25,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:25,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:25,917 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:54:25,918 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:25,953 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:54:25,953 INFO L518 ElimStorePlain]: Eliminatee v_prenex_746 vanished before elimination [2021-07-13 19:54:25,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:54:25,956 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:25,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:25,969 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:25,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:54:25,970 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:54:25,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:25,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828662737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:25,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:25,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:54:25,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764059380] [2021-07-13 19:54:25,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:54:25,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:25,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:54:25,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:54:25,999 INFO L87 Difference]: Start difference. First operand 195 states and 453 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:26,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:26,227 INFO L93 Difference]: Finished difference Result 245 states and 541 transitions. [2021-07-13 19:54:26,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:54:26,227 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:26,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:26,228 INFO L225 Difference]: With dead ends: 245 [2021-07-13 19:54:26,228 INFO L226 Difference]: Without dead ends: 229 [2021-07-13 19:54:26,228 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 377.4ms TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:54:26,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-07-13 19:54:26,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 193. [2021-07-13 19:54:26,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.328125) internal successors, (447), 192 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:26,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 447 transitions. [2021-07-13 19:54:26,230 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 447 transitions. Word has length 19 [2021-07-13 19:54:26,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:26,230 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 447 transitions. [2021-07-13 19:54:26,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:26,230 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 447 transitions. [2021-07-13 19:54:26,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:26,230 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:26,230 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:26,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16968,672 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:26,431 INFO L430 AbstractCegarLoop]: === Iteration 690 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:26,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:26,431 INFO L82 PathProgramCache]: Analyzing trace with hash 146256554, now seen corresponding path program 669 times [2021-07-13 19:54:26,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:26,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161996665] [2021-07-13 19:54:26,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:26,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:26,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:26,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:26,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161996665] [2021-07-13 19:54:26,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161996665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:26,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586182319] [2021-07-13 19:54:26,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:26,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:54:26,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:26,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:26,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:26,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:26,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:26,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:54:26,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:26,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:54:26,680 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:26,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:54:26,683 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:26,717 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-07-13 19:54:26,718 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:26,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:54:26,719 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-07-13 19:54:26,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:26,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586182319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:26,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:26,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:54:26,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943913060] [2021-07-13 19:54:26,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:26,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:26,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:26,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:26,746 INFO L87 Difference]: Start difference. First operand 193 states and 447 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:27,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:27,197 INFO L93 Difference]: Finished difference Result 392 states and 810 transitions. [2021-07-13 19:54:27,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:54:27,197 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:27,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:27,197 INFO L225 Difference]: With dead ends: 392 [2021-07-13 19:54:27,197 INFO L226 Difference]: Without dead ends: 383 [2021-07-13 19:54:27,198 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 369.3ms TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:54:27,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-07-13 19:54:27,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 193. [2021-07-13 19:54:27,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.3229166666666665) internal successors, (446), 192 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:27,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 446 transitions. [2021-07-13 19:54:27,200 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 446 transitions. Word has length 19 [2021-07-13 19:54:27,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:27,200 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 446 transitions. [2021-07-13 19:54:27,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:27,200 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 446 transitions. [2021-07-13 19:54:27,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:27,201 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:27,201 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:27,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 673 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16994 [2021-07-13 19:54:27,401 INFO L430 AbstractCegarLoop]: === Iteration 691 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:27,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:27,401 INFO L82 PathProgramCache]: Analyzing trace with hash 888377931, now seen corresponding path program 670 times [2021-07-13 19:54:27,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:27,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847740297] [2021-07-13 19:54:27,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:27,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:27,486 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:27,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:27,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847740297] [2021-07-13 19:54:27,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847740297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:27,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317901697] [2021-07-13 19:54:27,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 674 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 674 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:27,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:54:27,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:27,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:27,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:27,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:27,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:27,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:54:27,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:27,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:27,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:27,616 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:27,636 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-07-13 19:54:27,637 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:27,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:27,637 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-07-13 19:54:27,658 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:27,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317901697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:27,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:27,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:54:27,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338938397] [2021-07-13 19:54:27,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:27,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:27,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:27,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:27,659 INFO L87 Difference]: Start difference. First operand 193 states and 446 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:28,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:28,086 INFO L93 Difference]: Finished difference Result 471 states and 975 transitions. [2021-07-13 19:54:28,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:54:28,086 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:28,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:28,087 INFO L225 Difference]: With dead ends: 471 [2021-07-13 19:54:28,087 INFO L226 Difference]: Without dead ends: 471 [2021-07-13 19:54:28,087 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 319.9ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:54:28,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-07-13 19:54:28,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 193. [2021-07-13 19:54:28,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.3229166666666665) internal successors, (446), 192 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:28,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 446 transitions. [2021-07-13 19:54:28,090 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 446 transitions. Word has length 19 [2021-07-13 19:54:28,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:28,090 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 446 transitions. [2021-07-13 19:54:28,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:28,090 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 446 transitions. [2021-07-13 19:54:28,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:28,090 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:28,090 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:28,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17009,674 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:28,291 INFO L430 AbstractCegarLoop]: === Iteration 692 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:28,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:28,291 INFO L82 PathProgramCache]: Analyzing trace with hash -94189594, now seen corresponding path program 671 times [2021-07-13 19:54:28,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:28,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246371436] [2021-07-13 19:54:28,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:28,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:28,368 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:28,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:28,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246371436] [2021-07-13 19:54:28,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246371436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:28,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119410311] [2021-07-13 19:54:28,368 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 675 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 675 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:28,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:54:28,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:28,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:28,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:28,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:28,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:28,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:28,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:28,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:28,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:54:28,521 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:28,550 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:54:28,550 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:28,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:54:28,551 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:54:28,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:28,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119410311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:28,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:28,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:54:28,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711128072] [2021-07-13 19:54:28,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:28,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:28,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:28,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:28,602 INFO L87 Difference]: Start difference. First operand 193 states and 446 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:29,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:29,281 INFO L93 Difference]: Finished difference Result 455 states and 924 transitions. [2021-07-13 19:54:29,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:54:29,281 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:29,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:29,282 INFO L225 Difference]: With dead ends: 455 [2021-07-13 19:54:29,282 INFO L226 Difference]: Without dead ends: 449 [2021-07-13 19:54:29,282 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 598.0ms TimeCoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:54:29,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-07-13 19:54:29,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 195. [2021-07-13 19:54:29,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.3350515463917527) internal successors, (453), 194 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:29,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 453 transitions. [2021-07-13 19:54:29,285 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 453 transitions. Word has length 19 [2021-07-13 19:54:29,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:29,285 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 453 transitions. [2021-07-13 19:54:29,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:29,285 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 453 transitions. [2021-07-13 19:54:29,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:29,285 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:29,285 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:29,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17013,675 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:29,486 INFO L430 AbstractCegarLoop]: === Iteration 693 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:29,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:29,486 INFO L82 PathProgramCache]: Analyzing trace with hash -347344859, now seen corresponding path program 672 times [2021-07-13 19:54:29,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:29,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553414959] [2021-07-13 19:54:29,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:29,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:29,559 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:29,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:29,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553414959] [2021-07-13 19:54:29,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553414959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:29,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291434970] [2021-07-13 19:54:29,560 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 676 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 676 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:29,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:54:29,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:29,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:29,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:29,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:54:29,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:29,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:54:29,683 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:29,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:29,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:29,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:29,686 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:29,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:29,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:54:29,689 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:29,724 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-07-13 19:54:29,724 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:29,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:54:29,725 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:54:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:29,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291434970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:29,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:29,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:54:29,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116569771] [2021-07-13 19:54:29,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:29,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:29,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:29,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:29,769 INFO L87 Difference]: Start difference. First operand 195 states and 453 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:30,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:30,259 INFO L93 Difference]: Finished difference Result 540 states and 1104 transitions. [2021-07-13 19:54:30,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:54:30,259 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:30,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:30,260 INFO L225 Difference]: With dead ends: 540 [2021-07-13 19:54:30,260 INFO L226 Difference]: Without dead ends: 540 [2021-07-13 19:54:30,260 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 326.2ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:54:30,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-07-13 19:54:30,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 195. [2021-07-13 19:54:30,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.3350515463917527) internal successors, (453), 194 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:30,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 453 transitions. [2021-07-13 19:54:30,263 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 453 transitions. Word has length 19 [2021-07-13 19:54:30,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:30,263 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 453 transitions. [2021-07-13 19:54:30,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:30,263 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 453 transitions. [2021-07-13 19:54:30,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:30,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:30,263 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:30,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 676 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17031 [2021-07-13 19:54:30,464 INFO L430 AbstractCegarLoop]: === Iteration 694 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:30,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:30,464 INFO L82 PathProgramCache]: Analyzing trace with hash -794682582, now seen corresponding path program 673 times [2021-07-13 19:54:30,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:30,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787244023] [2021-07-13 19:54:30,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:30,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:30,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:30,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:30,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787244023] [2021-07-13 19:54:30,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787244023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:30,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624979469] [2021-07-13 19:54:30,541 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 677 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 677 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:30,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:30,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:30,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:30,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:30,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:30,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:54:30,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:30,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:30,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:30,689 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:30,718 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-07-13 19:54:30,718 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:30,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:54:30,719 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-07-13 19:54:30,761 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:30,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624979469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:30,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:30,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:54:30,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901950489] [2021-07-13 19:54:30,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:30,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:30,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:30,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:30,762 INFO L87 Difference]: Start difference. First operand 195 states and 453 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:31,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:31,302 INFO L93 Difference]: Finished difference Result 430 states and 891 transitions. [2021-07-13 19:54:31,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:54:31,303 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:31,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:31,303 INFO L225 Difference]: With dead ends: 430 [2021-07-13 19:54:31,303 INFO L226 Difference]: Without dead ends: 430 [2021-07-13 19:54:31,304 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 454.6ms TimeCoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:54:31,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-07-13 19:54:31,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 194. [2021-07-13 19:54:31,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.326424870466321) internal successors, (449), 193 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:31,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 449 transitions. [2021-07-13 19:54:31,306 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 449 transitions. Word has length 19 [2021-07-13 19:54:31,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:31,306 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 449 transitions. [2021-07-13 19:54:31,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:31,306 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 449 transitions. [2021-07-13 19:54:31,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:31,307 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:31,307 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:31,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17040,677 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:31,507 INFO L430 AbstractCegarLoop]: === Iteration 695 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:31,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:31,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1517487469, now seen corresponding path program 674 times [2021-07-13 19:54:31,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:31,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767317577] [2021-07-13 19:54:31,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:31,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:31,588 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:31,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:31,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767317577] [2021-07-13 19:54:31,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767317577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:31,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73095491] [2021-07-13 19:54:31,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 678 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 678 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:31,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:54:31,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:31,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:31,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:31,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:31,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:31,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:54:31,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:31,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:31,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:31,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:31,711 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:31,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:54:31,714 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:31,716 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:54:31,717 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:31,753 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-07-13 19:54:31,753 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:31,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:54:31,754 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-07-13 19:54:31,818 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:31,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73095491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:31,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:31,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:54:31,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791897513] [2021-07-13 19:54:31,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:31,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:31,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:31,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:31,819 INFO L87 Difference]: Start difference. First operand 194 states and 449 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:32,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:32,543 INFO L93 Difference]: Finished difference Result 533 states and 1074 transitions. [2021-07-13 19:54:32,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 19:54:32,544 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:32,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:32,544 INFO L225 Difference]: With dead ends: 533 [2021-07-13 19:54:32,544 INFO L226 Difference]: Without dead ends: 529 [2021-07-13 19:54:32,544 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 590.2ms TimeCoverageRelationStatistics Valid=200, Invalid=1692, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:54:32,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-07-13 19:54:32,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 191. [2021-07-13 19:54:32,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.3157894736842106) internal successors, (440), 190 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:32,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 440 transitions. [2021-07-13 19:54:32,547 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 440 transitions. Word has length 19 [2021-07-13 19:54:32,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:32,547 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 440 transitions. [2021-07-13 19:54:32,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:32,547 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 440 transitions. [2021-07-13 19:54:32,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:32,548 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:32,548 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:32,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 678 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17056 [2021-07-13 19:54:32,748 INFO L430 AbstractCegarLoop]: === Iteration 696 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:32,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:32,748 INFO L82 PathProgramCache]: Analyzing trace with hash 493555728, now seen corresponding path program 675 times [2021-07-13 19:54:32,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:32,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839799031] [2021-07-13 19:54:32,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:32,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:32,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:32,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:32,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839799031] [2021-07-13 19:54:32,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839799031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:32,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306681204] [2021-07-13 19:54:32,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 679 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 679 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:32,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:54:32,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:32,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:32,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:32,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:32,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:32,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:32,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:32,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:32,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:54:32,962 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:32,987 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:54:32,987 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:32,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:54:32,987 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:54:33,038 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:33,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306681204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:33,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:33,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:54:33,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297506835] [2021-07-13 19:54:33,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:33,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:33,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:33,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:33,038 INFO L87 Difference]: Start difference. First operand 191 states and 440 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:35,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:35,292 INFO L93 Difference]: Finished difference Result 768 states and 1465 transitions. [2021-07-13 19:54:35,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-07-13 19:54:35,292 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:35,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:35,293 INFO L225 Difference]: With dead ends: 768 [2021-07-13 19:54:35,293 INFO L226 Difference]: Without dead ends: 762 [2021-07-13 19:54:35,293 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2065 ImplicationChecksByTransitivity, 1972.4ms TimeCoverageRelationStatistics Valid=656, Invalid=5506, Unknown=0, NotChecked=0, Total=6162 [2021-07-13 19:54:35,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-07-13 19:54:35,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 201. [2021-07-13 19:54:35,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.39) internal successors, (478), 200 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:35,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 478 transitions. [2021-07-13 19:54:35,297 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 478 transitions. Word has length 19 [2021-07-13 19:54:35,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:35,297 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 478 transitions. [2021-07-13 19:54:35,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:35,297 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 478 transitions. [2021-07-13 19:54:35,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:35,297 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:35,297 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:35,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 679 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17069 [2021-07-13 19:54:35,498 INFO L430 AbstractCegarLoop]: === Iteration 697 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:35,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:35,498 INFO L82 PathProgramCache]: Analyzing trace with hash 240400463, now seen corresponding path program 676 times [2021-07-13 19:54:35,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:35,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922612526] [2021-07-13 19:54:35,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:35,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:35,575 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:35,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:35,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922612526] [2021-07-13 19:54:35,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922612526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:35,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524690151] [2021-07-13 19:54:35,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 680 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 680 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:35,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:54:35,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:35,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:35,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:35,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:54:35,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:35,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:35,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:54:35,732 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:35,771 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-07-13 19:54:35,771 INFO L518 ElimStorePlain]: Eliminatee v_prenex_748 vanished before elimination [2021-07-13 19:54:35,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:54:35,774 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:35,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:35,788 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:35,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:54:35,789 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:54:35,841 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:35,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524690151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:35,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:35,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:54:35,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125239753] [2021-07-13 19:54:35,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:35,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:35,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:35,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:35,842 INFO L87 Difference]: Start difference. First operand 201 states and 478 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:36,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:36,419 INFO L93 Difference]: Finished difference Result 479 states and 984 transitions. [2021-07-13 19:54:36,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:54:36,420 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:36,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:36,420 INFO L225 Difference]: With dead ends: 479 [2021-07-13 19:54:36,420 INFO L226 Difference]: Without dead ends: 473 [2021-07-13 19:54:36,420 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 509.4ms TimeCoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:54:36,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-07-13 19:54:36,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 201. [2021-07-13 19:54:36,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.39) internal successors, (478), 200 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:36,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 478 transitions. [2021-07-13 19:54:36,423 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 478 transitions. Word has length 19 [2021-07-13 19:54:36,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:36,423 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 478 transitions. [2021-07-13 19:54:36,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:36,423 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 478 transitions. [2021-07-13 19:54:36,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:36,423 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:36,424 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:36,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 680 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17079 [2021-07-13 19:54:36,624 INFO L430 AbstractCegarLoop]: === Iteration 698 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:36,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:36,624 INFO L82 PathProgramCache]: Analyzing trace with hash -206937260, now seen corresponding path program 677 times [2021-07-13 19:54:36,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:36,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857784906] [2021-07-13 19:54:36,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:36,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:36,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:36,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:36,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857784906] [2021-07-13 19:54:36,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857784906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:36,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851677871] [2021-07-13 19:54:36,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 681 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 681 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:36,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:54:36,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:36,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:36,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:36,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:36,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:36,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:36,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:36,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:36,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:54:36,845 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:36,871 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:54:36,871 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:36,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:54:36,872 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:54:36,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:36,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851677871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:36,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:36,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:54:36,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179089211] [2021-07-13 19:54:36,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:36,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:36,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:36,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:36,915 INFO L87 Difference]: Start difference. First operand 201 states and 478 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:38,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:38,254 INFO L93 Difference]: Finished difference Result 661 states and 1325 transitions. [2021-07-13 19:54:38,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 19:54:38,255 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:38,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:38,255 INFO L225 Difference]: With dead ends: 661 [2021-07-13 19:54:38,255 INFO L226 Difference]: Without dead ends: 661 [2021-07-13 19:54:38,256 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 1144.6ms TimeCoverageRelationStatistics Valid=383, Invalid=2479, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 19:54:38,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-07-13 19:54:38,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 198. [2021-07-13 19:54:38,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.3604060913705585) internal successors, (465), 197 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:38,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 465 transitions. [2021-07-13 19:54:38,259 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 465 transitions. Word has length 19 [2021-07-13 19:54:38,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:38,259 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 465 transitions. [2021-07-13 19:54:38,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:38,259 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 465 transitions. [2021-07-13 19:54:38,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:38,260 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:38,260 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:38,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17090,681 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:38,460 INFO L430 AbstractCegarLoop]: === Iteration 699 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:38,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:38,460 INFO L82 PathProgramCache]: Analyzing trace with hash 2105232791, now seen corresponding path program 678 times [2021-07-13 19:54:38,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:38,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876010635] [2021-07-13 19:54:38,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:38,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:38,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:38,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:38,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876010635] [2021-07-13 19:54:38,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876010635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:38,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603876474] [2021-07-13 19:54:38,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 682 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 682 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:38,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:54:38,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:38,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:38,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:38,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:38,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:38,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:38,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:38,717 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:54:38,718 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:38,765 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-07-13 19:54:38,765 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:38,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:54:38,769 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:38,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:38,786 INFO L518 ElimStorePlain]: Eliminatee v_prenex_751 vanished before elimination [2021-07-13 19:54:38,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:54:38,787 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:54:38,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:38,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603876474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:38,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:38,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:54:38,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458788940] [2021-07-13 19:54:38,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:38,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:38,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:38,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:38,862 INFO L87 Difference]: Start difference. First operand 198 states and 465 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:39,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:39,848 INFO L93 Difference]: Finished difference Result 497 states and 997 transitions. [2021-07-13 19:54:39,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 19:54:39,848 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:39,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:39,849 INFO L225 Difference]: With dead ends: 497 [2021-07-13 19:54:39,849 INFO L226 Difference]: Without dead ends: 493 [2021-07-13 19:54:39,849 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 844.6ms TimeCoverageRelationStatistics Valid=240, Invalid=2016, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:54:39,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-07-13 19:54:39,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 197. [2021-07-13 19:54:39,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.357142857142857) internal successors, (462), 196 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:39,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 462 transitions. [2021-07-13 19:54:39,852 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 462 transitions. Word has length 19 [2021-07-13 19:54:39,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:39,852 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 462 transitions. [2021-07-13 19:54:39,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:39,852 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 462 transitions. [2021-07-13 19:54:39,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:39,852 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:39,852 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:40,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17098,682 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:40,053 INFO L430 AbstractCegarLoop]: === Iteration 700 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:40,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:40,053 INFO L82 PathProgramCache]: Analyzing trace with hash -742167062, now seen corresponding path program 679 times [2021-07-13 19:54:40,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:40,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934749272] [2021-07-13 19:54:40,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:40,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:40,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:40,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:40,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934749272] [2021-07-13 19:54:40,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934749272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:40,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926028091] [2021-07-13 19:54:40,133 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 683 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 683 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:40,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:40,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:40,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:40,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:40,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:40,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:54:40,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:40,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:40,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:40,283 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:40,304 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:54:40,304 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:40,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:40,305 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:54:40,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:40,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926028091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:40,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:40,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:54:40,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107677816] [2021-07-13 19:54:40,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:40,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:40,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:40,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:40,328 INFO L87 Difference]: Start difference. First operand 197 states and 462 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:40,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:40,878 INFO L93 Difference]: Finished difference Result 519 states and 1068 transitions. [2021-07-13 19:54:40,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:54:40,879 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:40,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:40,879 INFO L225 Difference]: With dead ends: 519 [2021-07-13 19:54:40,879 INFO L226 Difference]: Without dead ends: 519 [2021-07-13 19:54:40,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 447.7ms TimeCoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:54:40,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-07-13 19:54:40,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 194. [2021-07-13 19:54:40,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.33160621761658) internal successors, (450), 193 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:40,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 450 transitions. [2021-07-13 19:54:40,882 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 450 transitions. Word has length 19 [2021-07-13 19:54:40,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:40,882 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 450 transitions. [2021-07-13 19:54:40,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:40,883 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 450 transitions. [2021-07-13 19:54:40,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:40,883 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:40,883 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:41,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17118,683 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:41,083 INFO L430 AbstractCegarLoop]: === Iteration 701 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:41,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:41,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1114023349, now seen corresponding path program 680 times [2021-07-13 19:54:41,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:41,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967431699] [2021-07-13 19:54:41,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:41,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:41,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:41,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:41,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967431699] [2021-07-13 19:54:41,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967431699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:41,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735053348] [2021-07-13 19:54:41,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 684 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 684 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:41,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:54:41,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:41,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:41,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:41,415 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:54:41,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:41,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:41,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:41,419 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:41,454 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:54:41,454 INFO L518 ElimStorePlain]: Eliminatee v_prenex_758 vanished before elimination [2021-07-13 19:54:41,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:54:41,457 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:41,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:41,470 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:41,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:54:41,470 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:54:41,498 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:41,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735053348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:41,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:41,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:54:41,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035609394] [2021-07-13 19:54:41,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:41,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:41,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:41,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:41,499 INFO L87 Difference]: Start difference. First operand 194 states and 450 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:42,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:42,111 INFO L93 Difference]: Finished difference Result 385 states and 800 transitions. [2021-07-13 19:54:42,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:54:42,111 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:42,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:42,112 INFO L225 Difference]: With dead ends: 385 [2021-07-13 19:54:42,112 INFO L226 Difference]: Without dead ends: 377 [2021-07-13 19:54:42,112 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 583.0ms TimeCoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:54:42,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-07-13 19:54:42,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 184. [2021-07-13 19:54:42,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.273224043715847) internal successors, (416), 183 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:42,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 416 transitions. [2021-07-13 19:54:42,114 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 416 transitions. Word has length 19 [2021-07-13 19:54:42,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:42,114 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 416 transitions. [2021-07-13 19:54:42,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:42,114 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 416 transitions. [2021-07-13 19:54:42,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:42,115 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:42,115 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:42,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17122,684 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:42,315 INFO L430 AbstractCegarLoop]: === Iteration 702 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:42,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:42,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1533791526, now seen corresponding path program 681 times [2021-07-13 19:54:42,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:42,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393020236] [2021-07-13 19:54:42,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:42,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:42,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:42,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:42,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393020236] [2021-07-13 19:54:42,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393020236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:42,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936461282] [2021-07-13 19:54:42,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 685 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 685 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:42,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:54:42,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:42,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:42,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:42,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:42,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:42,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:54:42,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:42,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:42,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:42,545 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:42,570 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:54:42,570 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:42,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:54:42,571 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:54:42,621 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:42,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936461282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:42,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:42,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:54:42,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064825434] [2021-07-13 19:54:42,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:42,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:42,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:42,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:42,622 INFO L87 Difference]: Start difference. First operand 184 states and 416 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:44,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:44,974 INFO L93 Difference]: Finished difference Result 542 states and 1062 transitions. [2021-07-13 19:54:44,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 19:54:44,975 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:44,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:44,975 INFO L225 Difference]: With dead ends: 542 [2021-07-13 19:54:44,975 INFO L226 Difference]: Without dead ends: 536 [2021-07-13 19:54:44,976 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 2149.3ms TimeCoverageRelationStatistics Valid=573, Invalid=4119, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 19:54:44,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-07-13 19:54:44,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 193. [2021-07-13 19:54:44,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.3333333333333335) internal successors, (448), 192 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:44,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 448 transitions. [2021-07-13 19:54:44,979 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 448 transitions. Word has length 19 [2021-07-13 19:54:44,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:44,979 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 448 transitions. [2021-07-13 19:54:44,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:44,979 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 448 transitions. [2021-07-13 19:54:44,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:44,979 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:44,979 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:45,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 685 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17138 [2021-07-13 19:54:45,180 INFO L430 AbstractCegarLoop]: === Iteration 703 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:45,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:45,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1280636261, now seen corresponding path program 682 times [2021-07-13 19:54:45,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:45,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652682680] [2021-07-13 19:54:45,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:45,257 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:45,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:45,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652682680] [2021-07-13 19:54:45,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652682680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:45,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365253134] [2021-07-13 19:54:45,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 686 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 686 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:45,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:54:45,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:45,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:45,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:45,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:54:45,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:45,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:45,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:54:45,439 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:45,480 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-07-13 19:54:45,480 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:45,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:54:45,483 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:45,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:45,497 INFO L518 ElimStorePlain]: Eliminatee v_prenex_761 vanished before elimination [2021-07-13 19:54:45,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:54:45,498 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:54:45,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:45,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365253134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:45,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:45,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:54:45,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651020329] [2021-07-13 19:54:45,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:45,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:45,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:45,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:45,552 INFO L87 Difference]: Start difference. First operand 193 states and 448 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:46,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:46,043 INFO L93 Difference]: Finished difference Result 371 states and 765 transitions. [2021-07-13 19:54:46,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:54:46,044 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:46,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:46,044 INFO L225 Difference]: With dead ends: 371 [2021-07-13 19:54:46,044 INFO L226 Difference]: Without dead ends: 365 [2021-07-13 19:54:46,044 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 479.7ms TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:54:46,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-07-13 19:54:46,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 193. [2021-07-13 19:54:46,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.3333333333333335) internal successors, (448), 192 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:46,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 448 transitions. [2021-07-13 19:54:46,047 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 448 transitions. Word has length 19 [2021-07-13 19:54:46,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:46,047 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 448 transitions. [2021-07-13 19:54:46,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:46,047 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 448 transitions. [2021-07-13 19:54:46,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:46,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:46,047 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:46,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 686 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17148 [2021-07-13 19:54:46,248 INFO L430 AbstractCegarLoop]: === Iteration 704 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:46,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:46,248 INFO L82 PathProgramCache]: Analyzing trace with hash 833298538, now seen corresponding path program 683 times [2021-07-13 19:54:46,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:46,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482972340] [2021-07-13 19:54:46,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:46,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:46,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:46,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:46,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482972340] [2021-07-13 19:54:46,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482972340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:46,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505360426] [2021-07-13 19:54:46,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 687 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 687 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:46,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:54:46,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:46,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:46,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:46,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:46,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:46,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:54:46,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:46,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:46,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:46,481 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:46,505 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:54:46,506 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:46,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:54:46,506 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:54:46,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:46,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505360426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:46,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:46,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:54:46,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018386470] [2021-07-13 19:54:46,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:46,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:46,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:46,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:46,550 INFO L87 Difference]: Start difference. First operand 193 states and 448 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:48,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:48,008 INFO L93 Difference]: Finished difference Result 505 states and 1011 transitions. [2021-07-13 19:54:48,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 19:54:48,009 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:48,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:48,009 INFO L225 Difference]: With dead ends: 505 [2021-07-13 19:54:48,009 INFO L226 Difference]: Without dead ends: 501 [2021-07-13 19:54:48,010 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1308.5ms TimeCoverageRelationStatistics Valid=354, Invalid=2196, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:54:48,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-07-13 19:54:48,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 186. [2021-07-13 19:54:48,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.2864864864864867) internal successors, (423), 185 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:48,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 423 transitions. [2021-07-13 19:54:48,012 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 423 transitions. Word has length 19 [2021-07-13 19:54:48,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:48,012 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 423 transitions. [2021-07-13 19:54:48,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:48,012 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 423 transitions. [2021-07-13 19:54:48,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:48,013 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:48,013 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:48,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 687 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17159 [2021-07-13 19:54:48,213 INFO L430 AbstractCegarLoop]: === Iteration 705 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:48,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:48,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1149498707, now seen corresponding path program 684 times [2021-07-13 19:54:48,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:48,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580476620] [2021-07-13 19:54:48,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:48,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:48,290 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:48,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:48,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580476620] [2021-07-13 19:54:48,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580476620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:48,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000382346] [2021-07-13 19:54:48,291 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 688 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 688 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:48,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:54:48,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:48,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:48,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:48,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:54:48,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:48,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:48,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:48,477 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:48,519 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-07-13 19:54:48,519 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:48,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:54:48,522 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:48,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:48,536 INFO L518 ElimStorePlain]: Eliminatee v_prenex_764 vanished before elimination [2021-07-13 19:54:48,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:54:48,537 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:54:48,611 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:48,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000382346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:48,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:48,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:54:48,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386489499] [2021-07-13 19:54:48,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:48,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:48,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:48,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:48,612 INFO L87 Difference]: Start difference. First operand 186 states and 423 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:49,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:49,356 INFO L93 Difference]: Finished difference Result 340 states and 701 transitions. [2021-07-13 19:54:49,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:54:49,357 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:49,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:49,357 INFO L225 Difference]: With dead ends: 340 [2021-07-13 19:54:49,357 INFO L226 Difference]: Without dead ends: 336 [2021-07-13 19:54:49,357 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 736.8ms TimeCoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:54:49,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-07-13 19:54:49,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 185. [2021-07-13 19:54:49,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.282608695652174) internal successors, (420), 184 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:49,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 420 transitions. [2021-07-13 19:54:49,359 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 420 transitions. Word has length 19 [2021-07-13 19:54:49,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:49,360 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 420 transitions. [2021-07-13 19:54:49,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:49,360 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 420 transitions. [2021-07-13 19:54:49,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:49,360 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:49,360 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:49,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17167,688 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:49,560 INFO L430 AbstractCegarLoop]: === Iteration 706 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:49,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:49,561 INFO L82 PathProgramCache]: Analyzing trace with hash 298068736, now seen corresponding path program 685 times [2021-07-13 19:54:49,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:49,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633534717] [2021-07-13 19:54:49,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:49,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:49,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:49,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:49,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633534717] [2021-07-13 19:54:49,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633534717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:49,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821439696] [2021-07-13 19:54:49,641 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 689 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 689 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:49,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:49,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:49,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:49,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:49,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:49,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:49,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:49,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:49,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:54:49,810 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:49,832 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:54:49,832 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:49,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:49,833 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:54:49,855 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:49,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821439696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:49,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:49,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:54:49,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066916557] [2021-07-13 19:54:49,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:49,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:49,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:49,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:49,856 INFO L87 Difference]: Start difference. First operand 185 states and 420 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:50,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:50,946 INFO L93 Difference]: Finished difference Result 388 states and 818 transitions. [2021-07-13 19:54:50,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:54:50,946 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:50,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:50,946 INFO L225 Difference]: With dead ends: 388 [2021-07-13 19:54:50,946 INFO L226 Difference]: Without dead ends: 388 [2021-07-13 19:54:50,947 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1030.1ms TimeCoverageRelationStatistics Valid=280, Invalid=1526, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:54:50,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-07-13 19:54:50,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 179. [2021-07-13 19:54:50,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.264044943820225) internal successors, (403), 178 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:50,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 403 transitions. [2021-07-13 19:54:50,949 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 403 transitions. Word has length 19 [2021-07-13 19:54:50,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:50,949 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 403 transitions. [2021-07-13 19:54:50,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:50,949 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 403 transitions. [2021-07-13 19:54:50,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:50,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:50,949 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:51,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17181,689 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:51,150 INFO L430 AbstractCegarLoop]: === Iteration 707 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:51,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:51,150 INFO L82 PathProgramCache]: Analyzing trace with hash -73787551, now seen corresponding path program 686 times [2021-07-13 19:54:51,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:51,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246736491] [2021-07-13 19:54:51,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:51,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:51,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:51,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:51,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246736491] [2021-07-13 19:54:51,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246736491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:51,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56457513] [2021-07-13 19:54:51,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 690 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 690 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:51,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:54:51,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:51,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:51,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:51,485 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:54:51,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:51,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:51,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:51,489 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:51,524 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:54:51,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:54:51,527 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:51,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:51,539 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:51,540 INFO L518 ElimStorePlain]: Eliminatee v_prenex_766 vanished before elimination [2021-07-13 19:54:51,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:54:51,540 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:54:51,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:51,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56457513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:51,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:51,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:54:51,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338005506] [2021-07-13 19:54:51,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:51,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:51,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:51,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:51,569 INFO L87 Difference]: Start difference. First operand 179 states and 403 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:52,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:52,031 INFO L93 Difference]: Finished difference Result 284 states and 604 transitions. [2021-07-13 19:54:52,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:54:52,031 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:52,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:52,031 INFO L225 Difference]: With dead ends: 284 [2021-07-13 19:54:52,031 INFO L226 Difference]: Without dead ends: 276 [2021-07-13 19:54:52,032 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 496.2ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:54:52,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-07-13 19:54:52,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 178. [2021-07-13 19:54:52,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.2598870056497176) internal successors, (400), 177 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:52,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 400 transitions. [2021-07-13 19:54:52,034 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 400 transitions. Word has length 19 [2021-07-13 19:54:52,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:52,034 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 400 transitions. [2021-07-13 19:54:52,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:52,034 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 400 transitions. [2021-07-13 19:54:52,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:52,034 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:52,034 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:52,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 690 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17185 [2021-07-13 19:54:52,235 INFO L430 AbstractCegarLoop]: === Iteration 708 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:52,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:52,235 INFO L82 PathProgramCache]: Analyzing trace with hash 885814058, now seen corresponding path program 687 times [2021-07-13 19:54:52,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:52,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994980428] [2021-07-13 19:54:52,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:52,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:52,315 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:52,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:52,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994980428] [2021-07-13 19:54:52,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994980428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:52,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842445809] [2021-07-13 19:54:52,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 691 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 691 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:52,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:54:52,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:52,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:52,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:52,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:52,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:52,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:54:52,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:52,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:52,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:52,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:52,492 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:54:52,493 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:52,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:52,493 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:54:52,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:52,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842445809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:52,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:52,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:54:52,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688396322] [2021-07-13 19:54:52,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:52,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:52,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:52,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:52,516 INFO L87 Difference]: Start difference. First operand 178 states and 400 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:52,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:52,865 INFO L93 Difference]: Finished difference Result 333 states and 703 transitions. [2021-07-13 19:54:52,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:54:52,865 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:52,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:52,865 INFO L225 Difference]: With dead ends: 333 [2021-07-13 19:54:52,865 INFO L226 Difference]: Without dead ends: 333 [2021-07-13 19:54:52,866 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 290.8ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:54:52,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-07-13 19:54:52,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 175. [2021-07-13 19:54:52,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.2413793103448274) internal successors, (390), 174 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:52,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 390 transitions. [2021-07-13 19:54:52,868 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 390 transitions. Word has length 19 [2021-07-13 19:54:52,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:52,868 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 390 transitions. [2021-07-13 19:54:52,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:52,868 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 390 transitions. [2021-07-13 19:54:52,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:52,868 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:52,868 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:53,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 691 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17212 [2021-07-13 19:54:53,069 INFO L430 AbstractCegarLoop]: === Iteration 709 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:53,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:53,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1086480083, now seen corresponding path program 688 times [2021-07-13 19:54:53,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:53,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240701379] [2021-07-13 19:54:53,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:53,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:53,148 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:53,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:53,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240701379] [2021-07-13 19:54:53,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240701379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:53,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817420567] [2021-07-13 19:54:53,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 692 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 692 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:53,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:54:53,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:53,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:53,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:53,430 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:54:53,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:53,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:53,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:53,434 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:53,470 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:54:53,470 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:53,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:54:53,473 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:53,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:53,486 INFO L518 ElimStorePlain]: Eliminatee v_prenex_774 vanished before elimination [2021-07-13 19:54:53,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:54:53,487 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:54:53,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:53,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817420567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:53,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:53,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:54:53,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076652208] [2021-07-13 19:54:53,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:53,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:53,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:53,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:53,516 INFO L87 Difference]: Start difference. First operand 175 states and 390 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:53,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:53,962 INFO L93 Difference]: Finished difference Result 275 states and 582 transitions. [2021-07-13 19:54:53,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:54:53,963 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:53,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:53,963 INFO L225 Difference]: With dead ends: 275 [2021-07-13 19:54:53,963 INFO L226 Difference]: Without dead ends: 263 [2021-07-13 19:54:53,963 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 487.2ms TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:54:53,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-07-13 19:54:53,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 175. [2021-07-13 19:54:53,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.235632183908046) internal successors, (389), 174 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:53,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 389 transitions. [2021-07-13 19:54:53,965 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 389 transitions. Word has length 19 [2021-07-13 19:54:53,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:53,965 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 389 transitions. [2021-07-13 19:54:53,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:53,965 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 389 transitions. [2021-07-13 19:54:53,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:53,965 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:53,965 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:54,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17216,692 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:54,166 INFO L430 AbstractCegarLoop]: === Iteration 710 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:54,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:54,166 INFO L82 PathProgramCache]: Analyzing trace with hash -578637104, now seen corresponding path program 689 times [2021-07-13 19:54:54,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:54,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255957840] [2021-07-13 19:54:54,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:54,247 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:54,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:54,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255957840] [2021-07-13 19:54:54,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255957840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:54,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722313342] [2021-07-13 19:54:54,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 693 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 693 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:54,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:54:54,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:54,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:54,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:54,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:54,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:54,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:54,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:54,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:54,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:54:54,415 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:54,440 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:54:54,440 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:54,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:54:54,441 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:54:54,493 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:54,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722313342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:54,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:54,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:54:54,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753279806] [2021-07-13 19:54:54,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:54,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:54,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:54,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:54,493 INFO L87 Difference]: Start difference. First operand 175 states and 389 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:54,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:54,907 INFO L93 Difference]: Finished difference Result 304 states and 636 transitions. [2021-07-13 19:54:54,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:54:54,908 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:54,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:54,908 INFO L225 Difference]: With dead ends: 304 [2021-07-13 19:54:54,908 INFO L226 Difference]: Without dead ends: 301 [2021-07-13 19:54:54,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 423.4ms TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:54:54,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-07-13 19:54:54,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 180. [2021-07-13 19:54:54,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.2625698324022347) internal successors, (405), 179 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:54,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 405 transitions. [2021-07-13 19:54:54,910 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 405 transitions. Word has length 19 [2021-07-13 19:54:54,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:54,910 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 405 transitions. [2021-07-13 19:54:54,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:54,911 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 405 transitions. [2021-07-13 19:54:54,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:54,911 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:54,911 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:55,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 693 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17232 [2021-07-13 19:54:55,111 INFO L430 AbstractCegarLoop]: === Iteration 711 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:55,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:55,112 INFO L82 PathProgramCache]: Analyzing trace with hash -831792369, now seen corresponding path program 690 times [2021-07-13 19:54:55,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:55,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661087622] [2021-07-13 19:54:55,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:55,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:55,206 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:55,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:55,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661087622] [2021-07-13 19:54:55,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661087622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:55,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069538822] [2021-07-13 19:54:55,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 694 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 694 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:55,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:54:55,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:55,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:55,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:55,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:54:55,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:55,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:55,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:54:55,407 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:55,448 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-07-13 19:54:55,448 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:55,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:54:55,451 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:55,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:55,465 INFO L518 ElimStorePlain]: Eliminatee v_prenex_777 vanished before elimination [2021-07-13 19:54:55,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:54:55,466 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:54:55,520 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:55,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069538822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:55,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:55,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:54:55,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208298351] [2021-07-13 19:54:55,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:55,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:55,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:55,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:55,521 INFO L87 Difference]: Start difference. First operand 180 states and 405 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:55,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:55,720 INFO L93 Difference]: Finished difference Result 289 states and 613 transitions. [2021-07-13 19:54:55,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:54:55,721 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:55,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:55,721 INFO L225 Difference]: With dead ends: 289 [2021-07-13 19:54:55,721 INFO L226 Difference]: Without dead ends: 289 [2021-07-13 19:54:55,721 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 234.7ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:54:55,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-07-13 19:54:55,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 180. [2021-07-13 19:54:55,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.2625698324022347) internal successors, (405), 179 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:55,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 405 transitions. [2021-07-13 19:54:55,723 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 405 transitions. Word has length 19 [2021-07-13 19:54:55,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:55,723 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 405 transitions. [2021-07-13 19:54:55,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:55,723 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 405 transitions. [2021-07-13 19:54:55,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:55,724 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:55,724 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:55,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17242,694 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:55,924 INFO L430 AbstractCegarLoop]: === Iteration 712 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:55,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:55,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1279130092, now seen corresponding path program 691 times [2021-07-13 19:54:55,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:55,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691881922] [2021-07-13 19:54:55,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:55,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:56,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:56,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:56,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691881922] [2021-07-13 19:54:56,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691881922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:56,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855042493] [2021-07-13 19:54:56,014 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 695 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 695 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:56,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:56,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:56,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:56,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:56,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:56,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:56,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:56,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:56,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:54:56,180 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:56,206 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:54:56,206 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:56,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:54:56,207 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:54:56,250 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:56,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855042493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:56,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:56,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:54:56,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241075664] [2021-07-13 19:54:56,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:56,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:56,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:56,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:56,251 INFO L87 Difference]: Start difference. First operand 180 states and 405 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:56,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:56,662 INFO L93 Difference]: Finished difference Result 304 states and 639 transitions. [2021-07-13 19:54:56,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:54:56,663 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:56,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:56,663 INFO L225 Difference]: With dead ends: 304 [2021-07-13 19:54:56,663 INFO L226 Difference]: Without dead ends: 304 [2021-07-13 19:54:56,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 396.6ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:54:56,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-07-13 19:54:56,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 180. [2021-07-13 19:54:56,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.2625698324022347) internal successors, (405), 179 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:56,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 405 transitions. [2021-07-13 19:54:56,665 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 405 transitions. Word has length 19 [2021-07-13 19:54:56,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:56,666 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 405 transitions. [2021-07-13 19:54:56,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:56,666 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 405 transitions. [2021-07-13 19:54:56,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:56,666 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:56,666 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:56,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 695 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17253 [2021-07-13 19:54:56,866 INFO L430 AbstractCegarLoop]: === Iteration 713 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:56,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:56,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1033039959, now seen corresponding path program 692 times [2021-07-13 19:54:56,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:56,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075492553] [2021-07-13 19:54:56,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:56,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:56,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:56,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:56,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075492553] [2021-07-13 19:54:56,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075492553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:56,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569039950] [2021-07-13 19:54:56,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 696 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 696 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:56,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:54:56,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:56,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:56,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:57,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:57,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:57,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:54:57,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:57,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:54:57,150 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:57,193 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-07-13 19:54:57,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:54:57,196 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:57,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:57,211 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:57,211 INFO L518 ElimStorePlain]: Eliminatee v_prenex_780 vanished before elimination [2021-07-13 19:54:57,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:54:57,212 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:54:57,288 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:57,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569039950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:57,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:57,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:54:57,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834432905] [2021-07-13 19:54:57,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:57,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:57,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:57,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:57,289 INFO L87 Difference]: Start difference. First operand 180 states and 405 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:57,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:57,681 INFO L93 Difference]: Finished difference Result 291 states and 614 transitions. [2021-07-13 19:54:57,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:54:57,681 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:57,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:57,682 INFO L225 Difference]: With dead ends: 291 [2021-07-13 19:54:57,682 INFO L226 Difference]: Without dead ends: 289 [2021-07-13 19:54:57,682 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 412.3ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:54:57,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-07-13 19:54:57,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 179. [2021-07-13 19:54:57,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.258426966292135) internal successors, (402), 178 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:57,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 402 transitions. [2021-07-13 19:54:57,684 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 402 transitions. Word has length 19 [2021-07-13 19:54:57,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:57,685 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 402 transitions. [2021-07-13 19:54:57,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:57,685 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 402 transitions. [2021-07-13 19:54:57,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:57,685 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:57,685 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:57,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17261,696 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:57,889 INFO L430 AbstractCegarLoop]: === Iteration 714 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:57,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:57,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1814359894, now seen corresponding path program 693 times [2021-07-13 19:54:57,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:57,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621525453] [2021-07-13 19:54:57,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:57,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:57,972 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:57,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:57,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621525453] [2021-07-13 19:54:57,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621525453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:57,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543933706] [2021-07-13 19:54:57,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 697 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 697 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:58,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:54:58,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:58,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:58,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:58,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:58,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:58,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:58,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:58,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:58,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:54:58,150 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:58,171 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:54:58,171 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:58,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:58,172 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:54:58,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:58,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543933706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:58,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:58,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:54:58,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924409342] [2021-07-13 19:54:58,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:58,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:58,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:58,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:58,196 INFO L87 Difference]: Start difference. First operand 179 states and 402 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:58,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:58,370 INFO L93 Difference]: Finished difference Result 286 states and 611 transitions. [2021-07-13 19:54:58,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:54:58,370 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:58,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:58,370 INFO L225 Difference]: With dead ends: 286 [2021-07-13 19:54:58,370 INFO L226 Difference]: Without dead ends: 286 [2021-07-13 19:54:58,370 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 205.5ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:54:58,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-07-13 19:54:58,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 178. [2021-07-13 19:54:58,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.2598870056497176) internal successors, (400), 177 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:58,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 400 transitions. [2021-07-13 19:54:58,372 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 400 transitions. Word has length 19 [2021-07-13 19:54:58,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:58,373 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 400 transitions. [2021-07-13 19:54:58,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:58,373 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 400 transitions. [2021-07-13 19:54:58,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:58,373 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:58,373 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:58,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 697 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17275 [2021-07-13 19:54:58,574 INFO L430 AbstractCegarLoop]: === Iteration 715 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:58,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:58,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1226614572, now seen corresponding path program 694 times [2021-07-13 19:54:58,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:58,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887319865] [2021-07-13 19:54:58,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:58,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:58,661 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:58,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:58,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887319865] [2021-07-13 19:54:58,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887319865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:58,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922994280] [2021-07-13 19:54:58,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 698 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 698 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:58,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:54:58,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:58,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:58,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:58,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:58,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:58,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:54:58,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:58,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:58,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:58,828 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:58,849 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:54:58,849 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:58,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:58,850 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:54:58,872 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:58,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922994280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:58,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:58,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:54:58,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930991082] [2021-07-13 19:54:58,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:58,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:58,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:58,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:58,873 INFO L87 Difference]: Start difference. First operand 178 states and 400 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:59,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:59,035 INFO L93 Difference]: Finished difference Result 287 states and 615 transitions. [2021-07-13 19:54:59,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:54:59,035 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:59,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:59,036 INFO L225 Difference]: With dead ends: 287 [2021-07-13 19:54:59,036 INFO L226 Difference]: Without dead ends: 287 [2021-07-13 19:54:59,036 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 203.2ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:54:59,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-07-13 19:54:59,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 178. [2021-07-13 19:54:59,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.2598870056497176) internal successors, (400), 177 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:59,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 400 transitions. [2021-07-13 19:54:59,038 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 400 transitions. Word has length 19 [2021-07-13 19:54:59,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:59,038 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 400 transitions. [2021-07-13 19:54:59,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:59,038 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 400 transitions. [2021-07-13 19:54:59,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:59,038 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:59,038 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:59,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17279,698 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:59,239 INFO L430 AbstractCegarLoop]: === Iteration 716 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:59,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:59,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1096058583, now seen corresponding path program 695 times [2021-07-13 19:54:59,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:59,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936840697] [2021-07-13 19:54:59,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:59,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:59,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:59,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:59,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936840697] [2021-07-13 19:54:59,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936840697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:59,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171828289] [2021-07-13 19:54:59,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 699 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 699 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:59,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:54:59,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:59,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:54:59,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:59,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:59,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:59,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:54:59,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:59,649 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:54:59,650 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:59,685 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:54:59,686 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:54:59,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:54:59,689 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:59,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:59,702 INFO L518 ElimStorePlain]: Eliminatee v_prenex_786 vanished before elimination [2021-07-13 19:54:59,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:54:59,703 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:54:59,731 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:59,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171828289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:59,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:59,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:54:59,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005687713] [2021-07-13 19:54:59,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:59,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:59,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:59,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:59,732 INFO L87 Difference]: Start difference. First operand 178 states and 400 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:59,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:59,973 INFO L93 Difference]: Finished difference Result 274 states and 586 transitions. [2021-07-13 19:54:59,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:54:59,973 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:54:59,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:59,973 INFO L225 Difference]: With dead ends: 274 [2021-07-13 19:54:59,973 INFO L226 Difference]: Without dead ends: 268 [2021-07-13 19:54:59,974 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 338.6ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:54:59,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-07-13 19:54:59,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 177. [2021-07-13 19:54:59,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.2556818181818183) internal successors, (397), 176 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:59,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 397 transitions. [2021-07-13 19:54:59,975 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 397 transitions. Word has length 19 [2021-07-13 19:54:59,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:59,976 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 397 transitions. [2021-07-13 19:54:59,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:59,976 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 397 transitions. [2021-07-13 19:54:59,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:54:59,976 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:59,976 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:00,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 699 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17283 [2021-07-13 19:55:00,176 INFO L430 AbstractCegarLoop]: === Iteration 717 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:00,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:00,177 INFO L82 PathProgramCache]: Analyzing trace with hash -186378774, now seen corresponding path program 696 times [2021-07-13 19:55:00,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:00,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134134793] [2021-07-13 19:55:00,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:00,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:00,260 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:00,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:00,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134134793] [2021-07-13 19:55:00,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134134793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:00,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679338653] [2021-07-13 19:55:00,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 700 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 700 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:00,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:55:00,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:00,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:55:00,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:00,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:00,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:00,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:55:00,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:00,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:00,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:55:00,425 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:00,446 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:55:00,446 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:55:00,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:00,447 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:55:00,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:00,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679338653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:00,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:00,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:55:00,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327655359] [2021-07-13 19:55:00,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:55:00,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:00,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:55:00,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:55:00,470 INFO L87 Difference]: Start difference. First operand 177 states and 397 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:00,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:00,659 INFO L93 Difference]: Finished difference Result 282 states and 602 transitions. [2021-07-13 19:55:00,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:55:00,659 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:55:00,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:00,659 INFO L225 Difference]: With dead ends: 282 [2021-07-13 19:55:00,659 INFO L226 Difference]: Without dead ends: 282 [2021-07-13 19:55:00,660 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 192.6ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:55:00,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-07-13 19:55:00,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 173. [2021-07-13 19:55:00,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.2325581395348837) internal successors, (384), 172 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:00,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 384 transitions. [2021-07-13 19:55:00,661 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 384 transitions. Word has length 19 [2021-07-13 19:55:00,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:00,662 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 384 transitions. [2021-07-13 19:55:00,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:00,662 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 384 transitions. [2021-07-13 19:55:00,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:55:00,662 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:00,662 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:00,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 700 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17309 [2021-07-13 19:55:00,862 INFO L430 AbstractCegarLoop]: === Iteration 718 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:00,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:00,863 INFO L82 PathProgramCache]: Analyzing trace with hash -232638837, now seen corresponding path program 697 times [2021-07-13 19:55:00,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:00,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812705620] [2021-07-13 19:55:00,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:00,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:00,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:00,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:00,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812705620] [2021-07-13 19:55:00,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812705620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:00,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423186922] [2021-07-13 19:55:00,947 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 701 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 701 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:00,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:00,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:55:00,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:01,279 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:55:01,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:01,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:01,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:55:01,284 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:01,320 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:55:01,320 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:55:01,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:55:01,323 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:01,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:01,336 INFO L518 ElimStorePlain]: Eliminatee v_prenex_792 vanished before elimination [2021-07-13 19:55:01,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:55:01,337 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:55:01,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:01,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423186922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:01,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:01,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:55:01,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883603256] [2021-07-13 19:55:01,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:55:01,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:01,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:55:01,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:55:01,368 INFO L87 Difference]: Start difference. First operand 173 states and 384 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:01,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:01,651 INFO L93 Difference]: Finished difference Result 267 states and 567 transitions. [2021-07-13 19:55:01,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:55:01,651 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:55:01,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:01,651 INFO L225 Difference]: With dead ends: 267 [2021-07-13 19:55:01,651 INFO L226 Difference]: Without dead ends: 259 [2021-07-13 19:55:01,652 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 364.5ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:55:01,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-07-13 19:55:01,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 172. [2021-07-13 19:55:01,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.2280701754385963) internal successors, (381), 171 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:01,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 381 transitions. [2021-07-13 19:55:01,653 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 381 transitions. Word has length 19 [2021-07-13 19:55:01,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:01,654 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 381 transitions. [2021-07-13 19:55:01,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:01,654 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 381 transitions. [2021-07-13 19:55:01,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:55:01,654 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:01,654 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:01,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 701 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17313 [2021-07-13 19:55:01,854 INFO L430 AbstractCegarLoop]: === Iteration 719 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:01,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:01,855 INFO L82 PathProgramCache]: Analyzing trace with hash 2019085248, now seen corresponding path program 698 times [2021-07-13 19:55:01,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:01,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471223228] [2021-07-13 19:55:01,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:01,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:01,941 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:01,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:01,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471223228] [2021-07-13 19:55:01,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471223228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:01,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724854142] [2021-07-13 19:55:01,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 702 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 702 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:01,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:55:01,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:01,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:55:01,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:02,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:02,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:02,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:55:02,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:02,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:02,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:55:02,124 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:02,150 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:55:02,150 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:55:02,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:55:02,151 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:55:02,203 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:02,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724854142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:02,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:02,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:55:02,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855569008] [2021-07-13 19:55:02,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:55:02,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:02,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:55:02,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:55:02,204 INFO L87 Difference]: Start difference. First operand 172 states and 381 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:02,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:02,709 INFO L93 Difference]: Finished difference Result 300 states and 624 transitions. [2021-07-13 19:55:02,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:55:02,709 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:55:02,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:02,710 INFO L225 Difference]: With dead ends: 300 [2021-07-13 19:55:02,710 INFO L226 Difference]: Without dead ends: 297 [2021-07-13 19:55:02,710 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 524.6ms TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:55:02,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-07-13 19:55:02,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 176. [2021-07-13 19:55:02,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.2457142857142856) internal successors, (393), 175 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:02,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 393 transitions. [2021-07-13 19:55:02,712 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 393 transitions. Word has length 19 [2021-07-13 19:55:02,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:02,712 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 393 transitions. [2021-07-13 19:55:02,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:02,712 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 393 transitions. [2021-07-13 19:55:02,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:55:02,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:02,712 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:02,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17339,702 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:02,913 INFO L430 AbstractCegarLoop]: === Iteration 720 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:02,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:02,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1765929983, now seen corresponding path program 699 times [2021-07-13 19:55:02,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:02,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605569756] [2021-07-13 19:55:02,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:02,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:03,001 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:03,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:03,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605569756] [2021-07-13 19:55:03,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605569756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:03,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708337987] [2021-07-13 19:55:03,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 703 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 703 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:03,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:55:03,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:03,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:55:03,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:03,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:55:03,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:03,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:03,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:55:03,230 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:03,271 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-07-13 19:55:03,272 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:55:03,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:55:03,275 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:03,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:03,289 INFO L518 ElimStorePlain]: Eliminatee v_prenex_795 vanished before elimination [2021-07-13 19:55:03,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:55:03,290 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:55:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:03,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708337987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:03,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:03,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:55:03,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524602842] [2021-07-13 19:55:03,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:55:03,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:03,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:55:03,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:55:03,347 INFO L87 Difference]: Start difference. First operand 176 states and 393 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:03,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:03,900 INFO L93 Difference]: Finished difference Result 362 states and 758 transitions. [2021-07-13 19:55:03,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:55:03,900 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:55:03,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:03,901 INFO L225 Difference]: With dead ends: 362 [2021-07-13 19:55:03,901 INFO L226 Difference]: Without dead ends: 362 [2021-07-13 19:55:03,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 520.9ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:55:03,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-07-13 19:55:03,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 176. [2021-07-13 19:55:03,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.2457142857142856) internal successors, (393), 175 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:03,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 393 transitions. [2021-07-13 19:55:03,903 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 393 transitions. Word has length 19 [2021-07-13 19:55:03,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:03,903 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 393 transitions. [2021-07-13 19:55:03,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:03,903 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 393 transitions. [2021-07-13 19:55:03,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:55:03,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:03,903 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:04,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17349,703 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:04,104 INFO L430 AbstractCegarLoop]: === Iteration 721 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:04,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:04,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1318592260, now seen corresponding path program 700 times [2021-07-13 19:55:04,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:04,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189373176] [2021-07-13 19:55:04,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:04,190 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:04,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:04,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189373176] [2021-07-13 19:55:04,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189373176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:04,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223469410] [2021-07-13 19:55:04,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 704 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 704 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:04,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:55:04,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:04,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:55:04,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:04,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:04,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:04,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:55:04,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:04,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:04,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:55:04,370 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:04,395 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-07-13 19:55:04,396 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:55:04,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:55:04,396 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-07-13 19:55:04,441 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:04,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223469410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:04,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:04,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:55:04,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260189092] [2021-07-13 19:55:04,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:55:04,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:04,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:55:04,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:55:04,442 INFO L87 Difference]: Start difference. First operand 176 states and 393 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:04,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:04,909 INFO L93 Difference]: Finished difference Result 303 states and 633 transitions. [2021-07-13 19:55:04,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:55:04,910 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:55:04,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:04,910 INFO L225 Difference]: With dead ends: 303 [2021-07-13 19:55:04,910 INFO L226 Difference]: Without dead ends: 303 [2021-07-13 19:55:04,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 468.1ms TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:55:04,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-07-13 19:55:04,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 176. [2021-07-13 19:55:04,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.2457142857142856) internal successors, (393), 175 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:04,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 393 transitions. [2021-07-13 19:55:04,912 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 393 transitions. Word has length 19 [2021-07-13 19:55:04,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:04,912 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 393 transitions. [2021-07-13 19:55:04,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:04,912 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 393 transitions. [2021-07-13 19:55:04,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:55:04,913 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:04,913 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:05,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17360,704 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:05,113 INFO L430 AbstractCegarLoop]: === Iteration 722 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:05,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:05,113 INFO L82 PathProgramCache]: Analyzing trace with hash -664204985, now seen corresponding path program 701 times [2021-07-13 19:55:05,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:05,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541727132] [2021-07-13 19:55:05,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:05,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:05,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:05,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:05,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541727132] [2021-07-13 19:55:05,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541727132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:05,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204148111] [2021-07-13 19:55:05,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 705 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 705 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:05,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:55:05,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:05,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:55:05,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:05,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:55:05,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:05,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:05,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:55:05,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:05,478 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-07-13 19:55:05,479 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:55:05,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-13 19:55:05,481 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:05,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:05,504 INFO L518 ElimStorePlain]: Eliminatee v_prenex_798 vanished before elimination [2021-07-13 19:55:05,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:55:05,505 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-07-13 19:55:05,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:05,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204148111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:05,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:05,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:55:05,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911264207] [2021-07-13 19:55:05,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:55:05,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:05,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:55:05,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:55:05,583 INFO L87 Difference]: Start difference. First operand 176 states and 393 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:06,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:06,555 INFO L93 Difference]: Finished difference Result 364 states and 759 transitions. [2021-07-13 19:55:06,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:55:06,555 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:55:06,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:06,556 INFO L225 Difference]: With dead ends: 364 [2021-07-13 19:55:06,556 INFO L226 Difference]: Without dead ends: 362 [2021-07-13 19:55:06,556 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 899.7ms TimeCoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:55:06,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-07-13 19:55:06,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 175. [2021-07-13 19:55:06,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.2413793103448274) internal successors, (390), 174 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:06,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 390 transitions. [2021-07-13 19:55:06,558 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 390 transitions. Word has length 19 [2021-07-13 19:55:06,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:06,558 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 390 transitions. [2021-07-13 19:55:06,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:06,558 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 390 transitions. [2021-07-13 19:55:06,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:55:06,558 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:06,558 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:06,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 705 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17368 [2021-07-13 19:55:06,759 INFO L430 AbstractCegarLoop]: === Iteration 723 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:06,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:06,759 INFO L82 PathProgramCache]: Analyzing trace with hash 783362458, now seen corresponding path program 702 times [2021-07-13 19:55:06,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:06,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379208114] [2021-07-13 19:55:06,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:06,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:06,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:06,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:06,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379208114] [2021-07-13 19:55:06,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379208114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:06,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057335793] [2021-07-13 19:55:06,849 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 706 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 706 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:06,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:55:06,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:06,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:55:06,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:07,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:07,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:07,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:55:07,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:07,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:07,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:55:07,037 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:07,058 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:55:07,058 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:55:07,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:07,059 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:55:07,082 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:07,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057335793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:07,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:07,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:55:07,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440433635] [2021-07-13 19:55:07,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:55:07,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:07,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:55:07,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:55:07,083 INFO L87 Difference]: Start difference. First operand 175 states and 390 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:07,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:07,291 INFO L93 Difference]: Finished difference Result 282 states and 599 transitions. [2021-07-13 19:55:07,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:55:07,291 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:55:07,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:07,292 INFO L225 Difference]: With dead ends: 282 [2021-07-13 19:55:07,292 INFO L226 Difference]: Without dead ends: 282 [2021-07-13 19:55:07,292 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 237.2ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:55:07,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-07-13 19:55:07,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 175. [2021-07-13 19:55:07,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.2413793103448274) internal successors, (390), 174 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:07,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 390 transitions. [2021-07-13 19:55:07,294 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 390 transitions. Word has length 19 [2021-07-13 19:55:07,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:07,294 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 390 transitions. [2021-07-13 19:55:07,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:07,294 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 390 transitions. [2021-07-13 19:55:07,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:55:07,294 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:07,294 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:07,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 706 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17388 [2021-07-13 19:55:07,495 INFO L430 AbstractCegarLoop]: === Iteration 724 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:07,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:07,495 INFO L82 PathProgramCache]: Analyzing trace with hash 411506171, now seen corresponding path program 703 times [2021-07-13 19:55:07,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:07,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849029193] [2021-07-13 19:55:07,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:07,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:07,586 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:07,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:07,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849029193] [2021-07-13 19:55:07,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849029193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:07,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563145072] [2021-07-13 19:55:07,587 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 707 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 707 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:07,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:07,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:55:07,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:07,904 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:55:07,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:07,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:07,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:55:07,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:07,944 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:55:07,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:55:07,947 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:07,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:07,960 INFO L518 ElimStorePlain]: Eliminatee v_prenex_804 vanished before elimination [2021-07-13 19:55:07,960 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:55:07,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:55:07,961 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:55:07,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:07,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563145072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:07,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:07,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:55:07,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011481081] [2021-07-13 19:55:07,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:55:07,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:07,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:55:07,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:55:07,991 INFO L87 Difference]: Start difference. First operand 175 states and 390 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:08,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:08,493 INFO L93 Difference]: Finished difference Result 356 states and 741 transitions. [2021-07-13 19:55:08,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:55:08,493 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:55:08,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:08,494 INFO L225 Difference]: With dead ends: 356 [2021-07-13 19:55:08,494 INFO L226 Difference]: Without dead ends: 352 [2021-07-13 19:55:08,494 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 542.6ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:55:08,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-07-13 19:55:08,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 174. [2021-07-13 19:55:08,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.2369942196531793) internal successors, (387), 173 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:08,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 387 transitions. [2021-07-13 19:55:08,496 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 387 transitions. Word has length 19 [2021-07-13 19:55:08,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:08,496 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 387 transitions. [2021-07-13 19:55:08,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:08,496 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 387 transitions. [2021-07-13 19:55:08,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:55:08,496 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:08,496 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:08,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 707 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17392 [2021-07-13 19:55:08,697 INFO L430 AbstractCegarLoop]: === Iteration 725 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:08,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:08,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1371107780, now seen corresponding path program 704 times [2021-07-13 19:55:08,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:08,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098052608] [2021-07-13 19:55:08,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:08,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:08,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:08,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098052608] [2021-07-13 19:55:08,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098052608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:08,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637401168] [2021-07-13 19:55:08,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 708 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 708 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:08,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:55:08,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:08,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:55:08,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:08,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:08,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:08,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:55:08,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:08,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:08,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:55:08,963 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:08,987 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:55:08,987 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:55:08,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:08,988 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:55:09,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:09,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637401168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:09,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:09,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:55:09,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426899356] [2021-07-13 19:55:09,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:55:09,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:09,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:55:09,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:55:09,013 INFO L87 Difference]: Start difference. First operand 174 states and 387 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:09,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:09,259 INFO L93 Difference]: Finished difference Result 283 states and 602 transitions. [2021-07-13 19:55:09,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:55:09,260 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:55:09,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:09,260 INFO L225 Difference]: With dead ends: 283 [2021-07-13 19:55:09,260 INFO L226 Difference]: Without dead ends: 283 [2021-07-13 19:55:09,260 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 250.2ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:55:09,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-07-13 19:55:09,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 174. [2021-07-13 19:55:09,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.2369942196531793) internal successors, (387), 173 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:09,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 387 transitions. [2021-07-13 19:55:09,262 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 387 transitions. Word has length 19 [2021-07-13 19:55:09,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:09,262 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 387 transitions. [2021-07-13 19:55:09,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:09,262 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 387 transitions. [2021-07-13 19:55:09,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:55:09,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:09,263 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:09,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17408,708 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:09,463 INFO L430 AbstractCegarLoop]: === Iteration 726 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:09,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:09,463 INFO L82 PathProgramCache]: Analyzing trace with hash -601186361, now seen corresponding path program 705 times [2021-07-13 19:55:09,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:09,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839295521] [2021-07-13 19:55:09,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:09,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:09,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:09,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:09,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839295521] [2021-07-13 19:55:09,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839295521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:09,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131063284] [2021-07-13 19:55:09,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 709 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 709 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:09,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:55:09,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:09,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:55:09,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:09,860 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:55:09,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:09,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:09,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:55:09,865 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:09,900 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:55:09,901 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:55:09,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:55:09,903 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:09,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:09,921 INFO L518 ElimStorePlain]: Eliminatee v_prenex_808 vanished before elimination [2021-07-13 19:55:09,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:55:09,922 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:55:09,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:09,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131063284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:09,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:09,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:55:09,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168666697] [2021-07-13 19:55:09,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:55:09,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:09,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:55:09,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:55:09,952 INFO L87 Difference]: Start difference. First operand 174 states and 387 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:10,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:10,435 INFO L93 Difference]: Finished difference Result 356 states and 739 transitions. [2021-07-13 19:55:10,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:55:10,435 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:55:10,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:10,435 INFO L225 Difference]: With dead ends: 356 [2021-07-13 19:55:10,435 INFO L226 Difference]: Without dead ends: 350 [2021-07-13 19:55:10,436 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 534.4ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:55:10,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-07-13 19:55:10,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 173. [2021-07-13 19:55:10,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.2325581395348837) internal successors, (384), 172 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:10,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 384 transitions. [2021-07-13 19:55:10,438 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 384 transitions. Word has length 19 [2021-07-13 19:55:10,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:10,438 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 384 transitions. [2021-07-13 19:55:10,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:10,438 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 384 transitions. [2021-07-13 19:55:10,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:55:10,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:10,438 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:10,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 709 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17412 [2021-07-13 19:55:10,639 INFO L430 AbstractCegarLoop]: === Iteration 727 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:10,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:10,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1883623718, now seen corresponding path program 706 times [2021-07-13 19:55:10,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:10,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656245778] [2021-07-13 19:55:10,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:10,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:10,726 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:10,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:10,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656245778] [2021-07-13 19:55:10,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656245778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:10,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133548361] [2021-07-13 19:55:10,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 710 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 710 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:10,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:55:10,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:10,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:55:10,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:10,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:10,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:10,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:55:10,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:10,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:10,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:55:10,904 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:10,925 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-07-13 19:55:10,925 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:55:10,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:10,926 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-07-13 19:55:10,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:10,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133548361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:10,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:10,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:55:10,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144769267] [2021-07-13 19:55:10,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:55:10,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:10,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:55:10,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:55:10,950 INFO L87 Difference]: Start difference. First operand 173 states and 384 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:11,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:11,197 INFO L93 Difference]: Finished difference Result 284 states and 605 transitions. [2021-07-13 19:55:11,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:55:11,197 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:55:11,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:11,198 INFO L225 Difference]: With dead ends: 284 [2021-07-13 19:55:11,198 INFO L226 Difference]: Without dead ends: 284 [2021-07-13 19:55:11,198 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 261.7ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:55:11,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-07-13 19:55:11,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 173. [2021-07-13 19:55:11,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.2325581395348837) internal successors, (384), 172 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:11,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 384 transitions. [2021-07-13 19:55:11,200 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 384 transitions. Word has length 19 [2021-07-13 19:55:11,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:11,200 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 384 transitions. [2021-07-13 19:55:11,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:11,200 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 384 transitions. [2021-07-13 19:55:11,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:55:11,200 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:11,200 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:11,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17439,710 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:11,401 INFO L430 AbstractCegarLoop]: === Iteration 728 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:11,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:11,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1929883781, now seen corresponding path program 707 times [2021-07-13 19:55:11,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:11,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283187223] [2021-07-13 19:55:11,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:11,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:11,488 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:11,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:11,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283187223] [2021-07-13 19:55:11,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283187223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:11,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184679044] [2021-07-13 19:55:11,488 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 711 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 711 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:11,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:55:11,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:11,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:55:11,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:11,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:11,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:11,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:55:11,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:11,831 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:55:11,832 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:11,867 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-07-13 19:55:11,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:55:11,870 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:11,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:11,883 INFO L518 ElimStorePlain]: Eliminatee v_prenex_814 vanished before elimination [2021-07-13 19:55:11,884 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:55:11,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:55:11,885 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-07-13 19:55:11,914 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:11,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184679044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:11,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:11,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:55:11,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072686125] [2021-07-13 19:55:11,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:55:11,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:11,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:55:11,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:55:11,915 INFO L87 Difference]: Start difference. First operand 173 states and 384 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:12,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:12,409 INFO L93 Difference]: Finished difference Result 356 states and 737 transitions. [2021-07-13 19:55:12,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:55:12,409 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:55:12,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:12,410 INFO L225 Difference]: With dead ends: 356 [2021-07-13 19:55:12,410 INFO L226 Difference]: Without dead ends: 348 [2021-07-13 19:55:12,410 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 562.1ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:55:12,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-07-13 19:55:12,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 172. [2021-07-13 19:55:12,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.2280701754385963) internal successors, (381), 171 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:12,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 381 transitions. [2021-07-13 19:55:12,412 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 381 transitions. Word has length 19 [2021-07-13 19:55:12,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:12,412 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 381 transitions. [2021-07-13 19:55:12,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:12,412 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 381 transitions. [2021-07-13 19:55:12,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:55:12,412 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:12,412 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:12,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 711 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17443 [2021-07-13 19:55:12,613 INFO L430 AbstractCegarLoop]: === Iteration 729 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:12,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:12,613 INFO L82 PathProgramCache]: Analyzing trace with hash -968542230, now seen corresponding path program 708 times [2021-07-13 19:55:12,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:12,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474017160] [2021-07-13 19:55:12,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:12,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:12,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:12,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:12,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474017160] [2021-07-13 19:55:12,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474017160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:12,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3076623] [2021-07-13 19:55:12,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 712 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 712 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:12,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:55:12,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:12,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:55:12,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:12,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3076623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:12,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:12,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-13 19:55:12,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012520841] [2021-07-13 19:55:12,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:55:12,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:12,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:55:12,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:55:12,858 INFO L87 Difference]: Start difference. First operand 172 states and 381 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:13,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:13,098 INFO L93 Difference]: Finished difference Result 366 states and 757 transitions. [2021-07-13 19:55:13,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:55:13,098 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:55:13,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:13,098 INFO L225 Difference]: With dead ends: 366 [2021-07-13 19:55:13,098 INFO L226 Difference]: Without dead ends: 366 [2021-07-13 19:55:13,098 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 275.1ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:55:13,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-07-13 19:55:13,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 166. [2021-07-13 19:55:13,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.212121212121212) internal successors, (365), 165 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:13,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 365 transitions. [2021-07-13 19:55:13,101 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 365 transitions. Word has length 19 [2021-07-13 19:55:13,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:13,101 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 365 transitions. [2021-07-13 19:55:13,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:13,101 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 365 transitions. [2021-07-13 19:55:13,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:55:13,101 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:13,101 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:13,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 712 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17459 [2021-07-13 19:55:13,302 INFO L430 AbstractCegarLoop]: === Iteration 730 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:13,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:13,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1437288019, now seen corresponding path program 709 times [2021-07-13 19:55:13,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:13,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081717202] [2021-07-13 19:55:13,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:13,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:13,388 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:13,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:13,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081717202] [2021-07-13 19:55:13,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081717202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:13,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904135260] [2021-07-13 19:55:13,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 713 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 713 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:13,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:55:13,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:13,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:13,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904135260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:13,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:13,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-13 19:55:13,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124906558] [2021-07-13 19:55:13,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:55:13,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:13,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:55:13,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:55:13,578 INFO L87 Difference]: Start difference. First operand 166 states and 365 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:13,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:13,942 INFO L93 Difference]: Finished difference Result 331 states and 692 transitions. [2021-07-13 19:55:13,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:55:13,942 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:55:13,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:13,942 INFO L225 Difference]: With dead ends: 331 [2021-07-13 19:55:13,942 INFO L226 Difference]: Without dead ends: 321 [2021-07-13 19:55:13,942 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 397.3ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:55:13,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-07-13 19:55:13,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 166. [2021-07-13 19:55:13,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.206060606060606) internal successors, (364), 165 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:13,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 364 transitions. [2021-07-13 19:55:13,945 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 364 transitions. Word has length 19 [2021-07-13 19:55:13,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:13,945 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 364 transitions. [2021-07-13 19:55:13,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:13,945 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 364 transitions. [2021-07-13 19:55:13,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:55:13,945 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:13,945 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:14,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17462,713 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:14,145 INFO L430 AbstractCegarLoop]: === Iteration 731 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:14,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:14,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1380416285, now seen corresponding path program 710 times [2021-07-13 19:55:14,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:14,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951236261] [2021-07-13 19:55:14,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:14,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:14,450 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:14,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:14,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951236261] [2021-07-13 19:55:14,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951236261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:14,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120644171] [2021-07-13 19:55:14,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 714 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 714 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:14,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:55:14,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:14,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:55:14,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:14,784 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:14,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120644171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:14,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:14,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-07-13 19:55:14,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686587731] [2021-07-13 19:55:14,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:55:14,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:14,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:55:14,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:55:14,785 INFO L87 Difference]: Start difference. First operand 166 states and 364 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:15,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:15,504 INFO L93 Difference]: Finished difference Result 457 states and 959 transitions. [2021-07-13 19:55:15,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:55:15,505 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:55:15,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:15,505 INFO L225 Difference]: With dead ends: 457 [2021-07-13 19:55:15,505 INFO L226 Difference]: Without dead ends: 450 [2021-07-13 19:55:15,506 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1014.6ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:55:15,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-07-13 19:55:15,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 176. [2021-07-13 19:55:15,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.1885714285714286) internal successors, (383), 175 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:15,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 383 transitions. [2021-07-13 19:55:15,508 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 383 transitions. Word has length 20 [2021-07-13 19:55:15,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:15,508 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 383 transitions. [2021-07-13 19:55:15,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:15,508 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 383 transitions. [2021-07-13 19:55:15,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:55:15,509 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:15,509 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:15,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 714 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17468 [2021-07-13 19:55:15,709 INFO L430 AbstractCegarLoop]: === Iteration 732 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:15,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:15,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1059407069, now seen corresponding path program 711 times [2021-07-13 19:55:15,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:15,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187159683] [2021-07-13 19:55:15,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:15,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:16,054 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:16,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:16,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187159683] [2021-07-13 19:55:16,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187159683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:16,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248991489] [2021-07-13 19:55:16,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 715 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 715 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:16,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:55:16,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:16,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:55:16,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:16,342 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:16,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248991489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:16,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:16,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-07-13 19:55:16,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96610715] [2021-07-13 19:55:16,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:55:16,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:16,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:55:16,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:55:16,343 INFO L87 Difference]: Start difference. First operand 176 states and 383 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:16,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:16,871 INFO L93 Difference]: Finished difference Result 461 states and 967 transitions. [2021-07-13 19:55:16,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:55:16,871 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:55:16,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:16,872 INFO L225 Difference]: With dead ends: 461 [2021-07-13 19:55:16,872 INFO L226 Difference]: Without dead ends: 454 [2021-07-13 19:55:16,872 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 846.0ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:55:16,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-07-13 19:55:16,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 177. [2021-07-13 19:55:16,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.1931818181818183) internal successors, (386), 176 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:16,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 386 transitions. [2021-07-13 19:55:16,875 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 386 transitions. Word has length 20 [2021-07-13 19:55:16,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:16,875 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 386 transitions. [2021-07-13 19:55:16,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:16,875 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 386 transitions. [2021-07-13 19:55:16,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:55:16,875 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:16,875 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:17,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 715 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17479 [2021-07-13 19:55:17,076 INFO L430 AbstractCegarLoop]: === Iteration 733 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:17,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:17,076 INFO L82 PathProgramCache]: Analyzing trace with hash -199921313, now seen corresponding path program 712 times [2021-07-13 19:55:17,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:17,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215074796] [2021-07-13 19:55:17,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:17,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:17,328 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:17,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:17,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215074796] [2021-07-13 19:55:17,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215074796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:17,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477934911] [2021-07-13 19:55:17,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 716 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 716 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:17,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:55:17,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:17,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:55:17,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:17,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477934911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:17,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:17,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-07-13 19:55:17,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479098994] [2021-07-13 19:55:17,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:55:17,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:17,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:55:17,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:55:17,602 INFO L87 Difference]: Start difference. First operand 177 states and 386 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:18,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:18,102 INFO L93 Difference]: Finished difference Result 462 states and 970 transitions. [2021-07-13 19:55:18,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:55:18,102 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:55:18,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:18,103 INFO L225 Difference]: With dead ends: 462 [2021-07-13 19:55:18,103 INFO L226 Difference]: Without dead ends: 455 [2021-07-13 19:55:18,103 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 716.4ms TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:55:18,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-07-13 19:55:18,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 178. [2021-07-13 19:55:18,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.1977401129943503) internal successors, (389), 177 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:18,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 389 transitions. [2021-07-13 19:55:18,106 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 389 transitions. Word has length 20 [2021-07-13 19:55:18,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:18,106 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 389 transitions. [2021-07-13 19:55:18,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:18,106 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 389 transitions. [2021-07-13 19:55:18,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:55:18,106 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:18,106 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:18,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17490,716 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:18,307 INFO L430 AbstractCegarLoop]: === Iteration 734 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:18,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:18,307 INFO L82 PathProgramCache]: Analyzing trace with hash 936182691, now seen corresponding path program 713 times [2021-07-13 19:55:18,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:18,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616403704] [2021-07-13 19:55:18,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:18,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:18,547 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:18,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:18,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616403704] [2021-07-13 19:55:18,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616403704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:18,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089777801] [2021-07-13 19:55:18,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 717 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 717 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:18,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:55:18,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:18,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:55:18,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:18,819 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:18,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089777801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:18,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:18,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-07-13 19:55:18,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730722277] [2021-07-13 19:55:18,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:55:18,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:18,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:55:18,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:55:18,820 INFO L87 Difference]: Start difference. First operand 178 states and 389 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:19,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:19,312 INFO L93 Difference]: Finished difference Result 463 states and 973 transitions. [2021-07-13 19:55:19,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:55:19,312 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:55:19,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:19,313 INFO L225 Difference]: With dead ends: 463 [2021-07-13 19:55:19,313 INFO L226 Difference]: Without dead ends: 456 [2021-07-13 19:55:19,313 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 607.8ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:55:19,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-07-13 19:55:19,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 179. [2021-07-13 19:55:19,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.202247191011236) internal successors, (392), 178 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:19,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 392 transitions. [2021-07-13 19:55:19,315 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 392 transitions. Word has length 20 [2021-07-13 19:55:19,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:19,315 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 392 transitions. [2021-07-13 19:55:19,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:19,315 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 392 transitions. [2021-07-13 19:55:19,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:55:19,316 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:19,316 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:19,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 717 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17500 [2021-07-13 19:55:19,516 INFO L430 AbstractCegarLoop]: === Iteration 735 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:19,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:19,517 INFO L82 PathProgramCache]: Analyzing trace with hash 695736543, now seen corresponding path program 714 times [2021-07-13 19:55:19,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:19,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729748809] [2021-07-13 19:55:19,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:19,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:19,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:19,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729748809] [2021-07-13 19:55:19,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729748809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:19,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233980495] [2021-07-13 19:55:19,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 718 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 718 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:19,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:55:19,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:19,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 19:55:19,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:20,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:20,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:20,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-07-13 19:55:20,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:20,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:20,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:20,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:55:20,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:20,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:20,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:20,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:55:20,516 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:20,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:20,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:20,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-07-13 19:55:20,523 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:20,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:20,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:20,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-07-13 19:55:20,531 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:20,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:20,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-07-13 19:55:20,538 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:20,759 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 61 [2021-07-13 19:55:20,759 INFO L628 ElimStorePlain]: treesize reduction 891, result has 11.5 percent of original size [2021-07-13 19:55:20,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:55:20,763 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:20,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:20,803 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:55:20,803 INFO L518 ElimStorePlain]: Eliminatee v_prenex_827 vanished before elimination [2021-07-13 19:55:20,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:55:20,807 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:20,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:20,850 INFO L518 ElimStorePlain]: Eliminatee v_prenex_829 vanished before elimination [2021-07-13 19:55:20,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:55:20,854 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:20,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:20,890 INFO L518 ElimStorePlain]: Eliminatee v_prenex_831 vanished before elimination [2021-07-13 19:55:20,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:55:20,892 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1201, output treesize:77 [2021-07-13 19:55:21,017 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:21,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233980495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:21,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:21,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-07-13 19:55:21,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789606411] [2021-07-13 19:55:21,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:55:21,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:21,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:55:21,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:55:21,018 INFO L87 Difference]: Start difference. First operand 179 states and 392 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:21,362 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-07-13 19:55:21,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:21,638 INFO L93 Difference]: Finished difference Result 464 states and 976 transitions. [2021-07-13 19:55:21,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:55:21,639 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:55:21,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:21,639 INFO L225 Difference]: With dead ends: 464 [2021-07-13 19:55:21,639 INFO L226 Difference]: Without dead ends: 457 [2021-07-13 19:55:21,640 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1017.6ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:55:21,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-07-13 19:55:21,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 180. [2021-07-13 19:55:21,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.206703910614525) internal successors, (395), 179 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:21,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 395 transitions. [2021-07-13 19:55:21,642 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 395 transitions. Word has length 20 [2021-07-13 19:55:21,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:21,642 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 395 transitions. [2021-07-13 19:55:21,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:21,642 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 395 transitions. [2021-07-13 19:55:21,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:55:21,642 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:21,643 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:21,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17508,718 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:21,843 INFO L430 AbstractCegarLoop]: === Iteration 736 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:21,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:21,843 INFO L82 PathProgramCache]: Analyzing trace with hash -4756445, now seen corresponding path program 715 times [2021-07-13 19:55:21,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:21,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319641066] [2021-07-13 19:55:21,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:21,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:22,053 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:22,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:22,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319641066] [2021-07-13 19:55:22,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319641066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:22,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661546223] [2021-07-13 19:55:22,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 719 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 719 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:22,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:22,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:55:22,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:22,297 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:22,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661546223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:22,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:22,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-07-13 19:55:22,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548336495] [2021-07-13 19:55:22,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:55:22,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:22,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:55:22,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:55:22,298 INFO L87 Difference]: Start difference. First operand 180 states and 395 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:22,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:22,749 INFO L93 Difference]: Finished difference Result 476 states and 995 transitions. [2021-07-13 19:55:22,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:55:22,749 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:55:22,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:22,750 INFO L225 Difference]: With dead ends: 476 [2021-07-13 19:55:22,750 INFO L226 Difference]: Without dead ends: 469 [2021-07-13 19:55:22,750 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 561.5ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:55:22,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-07-13 19:55:22,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 181. [2021-07-13 19:55:22,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.216666666666667) internal successors, (399), 180 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:22,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 399 transitions. [2021-07-13 19:55:22,752 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 399 transitions. Word has length 20 [2021-07-13 19:55:22,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:22,753 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 399 transitions. [2021-07-13 19:55:22,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:22,753 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 399 transitions. [2021-07-13 19:55:22,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:55:22,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:22,753 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:22,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 719 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17572 [2021-07-13 19:55:22,953 INFO L430 AbstractCegarLoop]: === Iteration 737 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:22,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:22,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1686828191, now seen corresponding path program 716 times [2021-07-13 19:55:22,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:22,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550154548] [2021-07-13 19:55:22,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:22,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:23,158 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:23,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:23,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550154548] [2021-07-13 19:55:23,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550154548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:23,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424868148] [2021-07-13 19:55:23,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 720 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 720 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:23,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:55:23,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:23,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:55:23,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:23,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424868148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:23,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:23,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-07-13 19:55:23,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934647763] [2021-07-13 19:55:23,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:55:23,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:23,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:55:23,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:55:23,409 INFO L87 Difference]: Start difference. First operand 181 states and 399 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:23,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:23,832 INFO L93 Difference]: Finished difference Result 464 states and 977 transitions. [2021-07-13 19:55:23,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:55:23,832 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:55:23,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:23,833 INFO L225 Difference]: With dead ends: 464 [2021-07-13 19:55:23,833 INFO L226 Difference]: Without dead ends: 457 [2021-07-13 19:55:23,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 528.7ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:55:23,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-07-13 19:55:23,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 181. [2021-07-13 19:55:23,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.216666666666667) internal successors, (399), 180 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:23,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 399 transitions. [2021-07-13 19:55:23,835 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 399 transitions. Word has length 20 [2021-07-13 19:55:23,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:23,835 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 399 transitions. [2021-07-13 19:55:23,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:23,835 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 399 transitions. [2021-07-13 19:55:23,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:55:23,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:23,836 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:24,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17582,720 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:24,036 INFO L430 AbstractCegarLoop]: === Iteration 738 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:24,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:24,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1255361233, now seen corresponding path program 717 times [2021-07-13 19:55:24,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:24,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153828254] [2021-07-13 19:55:24,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:24,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:24,286 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:24,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:24,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153828254] [2021-07-13 19:55:24,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153828254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:24,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529547314] [2021-07-13 19:55:24,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 721 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 721 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:24,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:55:24,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:24,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:55:24,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:24,778 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:24,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529547314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:24,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:24,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-07-13 19:55:24,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710304406] [2021-07-13 19:55:24,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:55:24,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:24,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:55:24,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:55:24,779 INFO L87 Difference]: Start difference. First operand 181 states and 399 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:25,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:25,095 INFO L93 Difference]: Finished difference Result 346 states and 725 transitions. [2021-07-13 19:55:25,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:55:25,096 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:55:25,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:25,096 INFO L225 Difference]: With dead ends: 346 [2021-07-13 19:55:25,096 INFO L226 Difference]: Without dead ends: 339 [2021-07-13 19:55:25,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 636.2ms TimeCoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:55:25,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-07-13 19:55:25,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 183. [2021-07-13 19:55:25,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.21978021978022) internal successors, (404), 182 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:25,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 404 transitions. [2021-07-13 19:55:25,098 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 404 transitions. Word has length 20 [2021-07-13 19:55:25,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:25,098 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 404 transitions. [2021-07-13 19:55:25,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:25,099 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 404 transitions. [2021-07-13 19:55:25,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:55:25,099 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:25,099 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:25,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 721 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17591 [2021-07-13 19:55:25,299 INFO L430 AbstractCegarLoop]: === Iteration 739 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:25,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:25,300 INFO L82 PathProgramCache]: Analyzing trace with hash 2114846989, now seen corresponding path program 718 times [2021-07-13 19:55:25,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:25,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602271850] [2021-07-13 19:55:25,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:25,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:25,542 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:25,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:25,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602271850] [2021-07-13 19:55:25,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602271850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:25,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952022843] [2021-07-13 19:55:25,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 722 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 722 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:25,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:55:25,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:25,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:55:25,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:26,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:26,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:26,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-07-13 19:55:26,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:26,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:26,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:26,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:55:26,258 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:26,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:26,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:26,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-13 19:55:26,267 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:26,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:26,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:26,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-13 19:55:26,274 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:26,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:26,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:26,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-13 19:55:26,283 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:26,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:26,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-13 19:55:26,290 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:26,476 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 65 [2021-07-13 19:55:26,477 INFO L628 ElimStorePlain]: treesize reduction 913, result has 12.0 percent of original size [2021-07-13 19:55:26,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:55:26,481 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:26,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:26,522 INFO L518 ElimStorePlain]: Eliminatee v_prenex_846 vanished before elimination [2021-07-13 19:55:26,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:55:26,526 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:26,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:26,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:26,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:55:26,570 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:26,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:26,607 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:55:26,607 INFO L518 ElimStorePlain]: Eliminatee v_prenex_848 vanished before elimination [2021-07-13 19:55:26,607 INFO L518 ElimStorePlain]: Eliminatee v_prenex_843 vanished before elimination [2021-07-13 19:55:26,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:55:26,609 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1201, output treesize:77 [2021-07-13 19:55:26,734 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:26,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952022843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:26,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:26,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-07-13 19:55:26,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076499625] [2021-07-13 19:55:26,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:55:26,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:26,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:55:26,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:55:26,735 INFO L87 Difference]: Start difference. First operand 183 states and 404 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:27,030 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2021-07-13 19:55:27,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:27,179 INFO L93 Difference]: Finished difference Result 350 states and 733 transitions. [2021-07-13 19:55:27,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:55:27,179 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:55:27,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:27,180 INFO L225 Difference]: With dead ends: 350 [2021-07-13 19:55:27,180 INFO L226 Difference]: Without dead ends: 343 [2021-07-13 19:55:27,180 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 894.2ms TimeCoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:55:27,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-07-13 19:55:27,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 184. [2021-07-13 19:55:27,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.2240437158469946) internal successors, (407), 183 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:27,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 407 transitions. [2021-07-13 19:55:27,182 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 407 transitions. Word has length 20 [2021-07-13 19:55:27,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:27,182 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 407 transitions. [2021-07-13 19:55:27,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:27,182 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 407 transitions. [2021-07-13 19:55:27,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:55:27,183 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:27,183 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:27,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17637,722 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:27,383 INFO L430 AbstractCegarLoop]: === Iteration 740 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:27,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:27,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1044016303, now seen corresponding path program 719 times [2021-07-13 19:55:27,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:27,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95093560] [2021-07-13 19:55:27,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:27,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:27,604 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:27,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:27,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95093560] [2021-07-13 19:55:27,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95093560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:27,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069959293] [2021-07-13 19:55:27,605 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 723 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 723 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:27,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:55:27,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:27,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:55:27,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:28,094 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:28,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069959293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:28,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:28,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-07-13 19:55:28,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341776028] [2021-07-13 19:55:28,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:55:28,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:28,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:55:28,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:55:28,095 INFO L87 Difference]: Start difference. First operand 184 states and 407 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:28,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:28,429 INFO L93 Difference]: Finished difference Result 351 states and 736 transitions. [2021-07-13 19:55:28,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:55:28,429 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:55:28,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:28,430 INFO L225 Difference]: With dead ends: 351 [2021-07-13 19:55:28,430 INFO L226 Difference]: Without dead ends: 344 [2021-07-13 19:55:28,430 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 576.8ms TimeCoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:55:28,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-07-13 19:55:28,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 185. [2021-07-13 19:55:28,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.2282608695652173) internal successors, (410), 184 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:28,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 410 transitions. [2021-07-13 19:55:28,433 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 410 transitions. Word has length 20 [2021-07-13 19:55:28,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:28,433 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 410 transitions. [2021-07-13 19:55:28,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:28,433 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 410 transitions. [2021-07-13 19:55:28,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:55:28,433 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:28,433 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:28,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17684,723 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:28,634 INFO L430 AbstractCegarLoop]: === Iteration 741 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:28,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:28,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1284462451, now seen corresponding path program 720 times [2021-07-13 19:55:28,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:28,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221312483] [2021-07-13 19:55:28,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:28,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:28,841 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:28,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:28,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221312483] [2021-07-13 19:55:28,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221312483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:28,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037520180] [2021-07-13 19:55:28,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 724 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 724 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:28,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:55:28,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:28,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 19:55:28,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:29,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:29,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:29,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-07-13 19:55:29,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:29,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:29,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:29,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-07-13 19:55:29,529 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:29,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:29,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:29,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-07-13 19:55:29,536 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:29,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:29,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:29,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:55:29,543 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:29,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:29,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:29,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:55:29,550 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:29,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:29,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-07-13 19:55:29,557 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:29,746 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 61 [2021-07-13 19:55:29,747 INFO L628 ElimStorePlain]: treesize reduction 891, result has 11.5 percent of original size [2021-07-13 19:55:29,747 INFO L518 ElimStorePlain]: Eliminatee v_prenex_856 vanished before elimination [2021-07-13 19:55:29,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:55:29,751 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:29,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:29,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:55:29,795 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:29,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:29,833 INFO L518 ElimStorePlain]: Eliminatee v_prenex_858 vanished before elimination [2021-07-13 19:55:29,833 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:55:29,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:55:29,836 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:29,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:29,873 INFO L518 ElimStorePlain]: Eliminatee v_prenex_860 vanished before elimination [2021-07-13 19:55:29,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:55:29,874 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1201, output treesize:77 [2021-07-13 19:55:29,982 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:29,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037520180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:29,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:29,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-07-13 19:55:29,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098867953] [2021-07-13 19:55:29,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:55:29,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:29,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:55:29,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:55:29,983 INFO L87 Difference]: Start difference. First operand 185 states and 410 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:30,326 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-07-13 19:55:30,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:30,449 INFO L93 Difference]: Finished difference Result 352 states and 739 transitions. [2021-07-13 19:55:30,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:55:30,449 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:55:30,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:30,450 INFO L225 Difference]: With dead ends: 352 [2021-07-13 19:55:30,450 INFO L226 Difference]: Without dead ends: 345 [2021-07-13 19:55:30,450 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 812.2ms TimeCoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:55:30,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-07-13 19:55:30,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 186. [2021-07-13 19:55:30,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.2324324324324323) internal successors, (413), 185 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:30,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 413 transitions. [2021-07-13 19:55:30,452 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 413 transitions. Word has length 20 [2021-07-13 19:55:30,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:30,452 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 413 transitions. [2021-07-13 19:55:30,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:30,452 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 413 transitions. [2021-07-13 19:55:30,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:55:30,453 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:30,453 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:30,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 724 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17731 [2021-07-13 19:55:30,653 INFO L430 AbstractCegarLoop]: === Iteration 742 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:30,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:30,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1984955439, now seen corresponding path program 721 times [2021-07-13 19:55:30,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:30,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574739347] [2021-07-13 19:55:30,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:30,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:30,848 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:30,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:30,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574739347] [2021-07-13 19:55:30,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574739347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:30,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292884652] [2021-07-13 19:55:30,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 725 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 725 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:30,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:30,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:55:30,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:31,241 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:31,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292884652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:31,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:31,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-07-13 19:55:31,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862130189] [2021-07-13 19:55:31,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:55:31,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:31,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:55:31,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:55:31,242 INFO L87 Difference]: Start difference. First operand 186 states and 413 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:31,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:31,603 INFO L93 Difference]: Finished difference Result 364 states and 758 transitions. [2021-07-13 19:55:31,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:55:31,603 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:55:31,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:31,604 INFO L225 Difference]: With dead ends: 364 [2021-07-13 19:55:31,604 INFO L226 Difference]: Without dead ends: 357 [2021-07-13 19:55:31,604 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 480.3ms TimeCoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:55:31,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-07-13 19:55:31,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 187. [2021-07-13 19:55:31,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.2419354838709675) internal successors, (417), 186 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:31,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 417 transitions. [2021-07-13 19:55:31,606 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 417 transitions. Word has length 20 [2021-07-13 19:55:31,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:31,606 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 417 transitions. [2021-07-13 19:55:31,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:31,607 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 417 transitions. [2021-07-13 19:55:31,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:55:31,607 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:31,607 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:31,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 725 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17795 [2021-07-13 19:55:31,807 INFO L430 AbstractCegarLoop]: === Iteration 743 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:31,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:31,808 INFO L82 PathProgramCache]: Analyzing trace with hash -293370803, now seen corresponding path program 722 times [2021-07-13 19:55:31,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:31,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712315279] [2021-07-13 19:55:31,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:31,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:32,009 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:32,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:32,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712315279] [2021-07-13 19:55:32,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712315279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:32,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270057400] [2021-07-13 19:55:32,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 726 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 726 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:32,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:55:32,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:32,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:55:32,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:32,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:32,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:32,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-13 19:55:32,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:32,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:32,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:32,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-13 19:55:32,469 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:32,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:32,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:32,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-13 19:55:32,475 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:32,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:32,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:32,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-07-13 19:55:32,482 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:32,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:32,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:32,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-13 19:55:32,488 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:32,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:32,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:55:32,494 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:32,633 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 53 [2021-07-13 19:55:32,634 INFO L628 ElimStorePlain]: treesize reduction 680, result has 12.0 percent of original size [2021-07-13 19:55:32,634 INFO L518 ElimStorePlain]: Eliminatee v_prenex_868 vanished before elimination [2021-07-13 19:55:32,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:55:32,638 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:32,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:32,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:55:32,674 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:32,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:32,706 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:55:32,706 INFO L518 ElimStorePlain]: Eliminatee v_prenex_870 vanished before elimination [2021-07-13 19:55:32,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:55:32,708 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:949, output treesize:85 [2021-07-13 19:55:32,862 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:32,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270057400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:32,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:32,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-07-13 19:55:32,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005004122] [2021-07-13 19:55:32,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:55:32,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:32,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:55:32,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:55:32,863 INFO L87 Difference]: Start difference. First operand 187 states and 417 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:33,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:33,260 INFO L93 Difference]: Finished difference Result 352 states and 740 transitions. [2021-07-13 19:55:33,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:55:33,260 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:55:33,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:33,260 INFO L225 Difference]: With dead ends: 352 [2021-07-13 19:55:33,261 INFO L226 Difference]: Without dead ends: 345 [2021-07-13 19:55:33,261 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 701.4ms TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:55:33,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-07-13 19:55:33,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 182. [2021-07-13 19:55:33,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.2154696132596685) internal successors, (401), 181 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:33,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 401 transitions. [2021-07-13 19:55:33,263 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 401 transitions. Word has length 20 [2021-07-13 19:55:33,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:33,263 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 401 transitions. [2021-07-13 19:55:33,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:33,263 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 401 transitions. [2021-07-13 19:55:33,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:55:33,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:33,263 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:33,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 726 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17829 [2021-07-13 19:55:33,464 INFO L430 AbstractCegarLoop]: === Iteration 744 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:33,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:33,464 INFO L82 PathProgramCache]: Analyzing trace with hash 2418359, now seen corresponding path program 723 times [2021-07-13 19:55:33,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:33,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577855459] [2021-07-13 19:55:33,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:33,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:33,638 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:33,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:33,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577855459] [2021-07-13 19:55:33,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577855459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:33,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209087750] [2021-07-13 19:55:33,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 727 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 727 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:33,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:55:33,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:33,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:55:33,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:34,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209087750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:34,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:34,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-07-13 19:55:34,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936974357] [2021-07-13 19:55:34,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:55:34,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:34,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:55:34,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:55:34,063 INFO L87 Difference]: Start difference. First operand 182 states and 401 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:34,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:34,723 INFO L93 Difference]: Finished difference Result 418 states and 851 transitions. [2021-07-13 19:55:34,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:55:34,724 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:55:34,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:34,724 INFO L225 Difference]: With dead ends: 418 [2021-07-13 19:55:34,724 INFO L226 Difference]: Without dead ends: 411 [2021-07-13 19:55:34,724 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 723.3ms TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:55:34,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-07-13 19:55:34,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 206. [2021-07-13 19:55:34,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.2390243902439027) internal successors, (459), 205 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:34,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 459 transitions. [2021-07-13 19:55:34,727 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 459 transitions. Word has length 20 [2021-07-13 19:55:34,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:34,727 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 459 transitions. [2021-07-13 19:55:34,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:34,727 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 459 transitions. [2021-07-13 19:55:34,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:55:34,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:34,728 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:34,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17866,727 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:34,928 INFO L430 AbstractCegarLoop]: === Iteration 745 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:34,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:34,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1138522363, now seen corresponding path program 724 times [2021-07-13 19:55:34,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:34,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400540933] [2021-07-13 19:55:34,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:34,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:35,233 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:35,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:35,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400540933] [2021-07-13 19:55:35,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400540933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:35,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353261949] [2021-07-13 19:55:35,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 728 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 728 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:35,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:55:35,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:35,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:55:35,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:35,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353261949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:35,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:35,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-13 19:55:35,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800124346] [2021-07-13 19:55:35,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:55:35,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:35,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:55:35,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:55:35,734 INFO L87 Difference]: Start difference. First operand 206 states and 459 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:36,473 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2021-07-13 19:55:36,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:36,995 INFO L93 Difference]: Finished difference Result 419 states and 850 transitions. [2021-07-13 19:55:36,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:55:36,996 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:55:36,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:36,996 INFO L225 Difference]: With dead ends: 419 [2021-07-13 19:55:36,996 INFO L226 Difference]: Without dead ends: 403 [2021-07-13 19:55:36,997 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1426.4ms TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:55:36,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-07-13 19:55:36,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 212. [2021-07-13 19:55:36,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.2322274881516586) internal successors, (471), 211 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:36,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 471 transitions. [2021-07-13 19:55:36,999 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 471 transitions. Word has length 20 [2021-07-13 19:55:36,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:36,999 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 471 transitions. [2021-07-13 19:55:36,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:36,999 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 471 transitions. [2021-07-13 19:55:37,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:55:37,000 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:37,000 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:37,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17901,728 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:37,200 INFO L430 AbstractCegarLoop]: === Iteration 746 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:37,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:37,200 INFO L82 PathProgramCache]: Analyzing trace with hash 898076215, now seen corresponding path program 725 times [2021-07-13 19:55:37,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:37,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532097911] [2021-07-13 19:55:37,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:37,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:37,392 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:37,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:37,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532097911] [2021-07-13 19:55:37,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532097911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:37,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133370688] [2021-07-13 19:55:37,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 729 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 729 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:37,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:55:37,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:37,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:55:37,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:37,846 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:37,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133370688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:37,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:37,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-07-13 19:55:37,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773638918] [2021-07-13 19:55:37,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:55:37,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:37,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:55:37,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:55:37,846 INFO L87 Difference]: Start difference. First operand 212 states and 471 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:38,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:38,546 INFO L93 Difference]: Finished difference Result 430 states and 879 transitions. [2021-07-13 19:55:38,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:55:38,546 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:55:38,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:38,547 INFO L225 Difference]: With dead ends: 430 [2021-07-13 19:55:38,547 INFO L226 Difference]: Without dead ends: 423 [2021-07-13 19:55:38,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 794.4ms TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:55:38,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-07-13 19:55:38,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 214. [2021-07-13 19:55:38,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.244131455399061) internal successors, (478), 213 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:38,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 478 transitions. [2021-07-13 19:55:38,550 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 478 transitions. Word has length 20 [2021-07-13 19:55:38,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:38,550 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 478 transitions. [2021-07-13 19:55:38,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:38,550 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 478 transitions. [2021-07-13 19:55:38,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:55:38,550 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:38,551 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:38,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17947,729 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:38,751 INFO L430 AbstractCegarLoop]: === Iteration 747 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:38,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:38,751 INFO L82 PathProgramCache]: Analyzing trace with hash 197583227, now seen corresponding path program 726 times [2021-07-13 19:55:38,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:38,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128228883] [2021-07-13 19:55:38,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:38,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:39,035 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:39,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:39,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128228883] [2021-07-13 19:55:39,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128228883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:39,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733605233] [2021-07-13 19:55:39,036 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 730 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 730 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:39,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:55:39,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:39,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:55:39,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:39,440 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:39,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733605233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:39,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:39,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-07-13 19:55:39,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485350320] [2021-07-13 19:55:39,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:55:39,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:39,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:55:39,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:55:39,441 INFO L87 Difference]: Start difference. First operand 214 states and 478 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:40,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:40,441 INFO L93 Difference]: Finished difference Result 431 states and 882 transitions. [2021-07-13 19:55:40,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:55:40,441 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:55:40,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:40,442 INFO L225 Difference]: With dead ends: 431 [2021-07-13 19:55:40,442 INFO L226 Difference]: Without dead ends: 424 [2021-07-13 19:55:40,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1044.3ms TimeCoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:55:40,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-07-13 19:55:40,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 215. [2021-07-13 19:55:40,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2523364485981308) internal successors, (482), 214 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:40,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 482 transitions. [2021-07-13 19:55:40,445 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 482 transitions. Word has length 20 [2021-07-13 19:55:40,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:40,445 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 482 transitions. [2021-07-13 19:55:40,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:40,445 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 482 transitions. [2021-07-13 19:55:40,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:55:40,445 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:40,445 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:40,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 730 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17994 [2021-07-13 19:55:40,646 INFO L430 AbstractCegarLoop]: === Iteration 748 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:40,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:40,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1889167863, now seen corresponding path program 727 times [2021-07-13 19:55:40,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:40,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276216227] [2021-07-13 19:55:40,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:40,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:40,948 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:40,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:40,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276216227] [2021-07-13 19:55:40,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276216227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:40,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714345244] [2021-07-13 19:55:40,949 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 731 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 731 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:40,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:40,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:55:40,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:41,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714345244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:41,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:41,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-13 19:55:41,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814803630] [2021-07-13 19:55:41,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:55:41,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:41,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:55:41,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:55:41,412 INFO L87 Difference]: Start difference. First operand 215 states and 482 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:42,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:42,642 INFO L93 Difference]: Finished difference Result 464 states and 962 transitions. [2021-07-13 19:55:42,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:55:42,642 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:55:42,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:42,643 INFO L225 Difference]: With dead ends: 464 [2021-07-13 19:55:42,643 INFO L226 Difference]: Without dead ends: 457 [2021-07-13 19:55:42,643 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1289.6ms TimeCoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:55:42,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-07-13 19:55:42,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 227. [2021-07-13 19:55:42,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.2964601769911503) internal successors, (519), 226 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:42,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 519 transitions. [2021-07-13 19:55:42,646 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 519 transitions. Word has length 20 [2021-07-13 19:55:42,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:42,646 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 519 transitions. [2021-07-13 19:55:42,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:42,646 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 519 transitions. [2021-07-13 19:55:42,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:55:42,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:42,646 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:42,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 731 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18029 [2021-07-13 19:55:42,847 INFO L430 AbstractCegarLoop]: === Iteration 749 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:42,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:42,847 INFO L82 PathProgramCache]: Analyzing trace with hash -2116209135, now seen corresponding path program 728 times [2021-07-13 19:55:42,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:42,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733314522] [2021-07-13 19:55:42,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:42,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:43,082 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:43,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:43,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733314522] [2021-07-13 19:55:43,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733314522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:43,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877137031] [2021-07-13 19:55:43,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 732 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 732 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:43,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:55:43,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:43,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:55:43,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:43,498 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:43,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877137031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:43,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:43,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-07-13 19:55:43,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52387743] [2021-07-13 19:55:43,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:55:43,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:43,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:55:43,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:55:43,499 INFO L87 Difference]: Start difference. First operand 227 states and 519 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:44,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:44,226 INFO L93 Difference]: Finished difference Result 523 states and 1100 transitions. [2021-07-13 19:55:44,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:55:44,226 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:55:44,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:44,227 INFO L225 Difference]: With dead ends: 523 [2021-07-13 19:55:44,227 INFO L226 Difference]: Without dead ends: 516 [2021-07-13 19:55:44,227 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 824.9ms TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:55:44,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-07-13 19:55:44,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 250. [2021-07-13 19:55:44,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.3815261044176705) internal successors, (593), 249 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:44,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 593 transitions. [2021-07-13 19:55:44,231 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 593 transitions. Word has length 20 [2021-07-13 19:55:44,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:44,231 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 593 transitions. [2021-07-13 19:55:44,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:44,231 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 593 transitions. [2021-07-13 19:55:44,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:55:44,231 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:44,231 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:44,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18076,732 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:44,432 INFO L430 AbstractCegarLoop]: === Iteration 750 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:44,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:44,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1938312013, now seen corresponding path program 729 times [2021-07-13 19:55:44,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:44,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348540487] [2021-07-13 19:55:44,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:44,597 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:44,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:44,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348540487] [2021-07-13 19:55:44,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348540487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:44,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133909182] [2021-07-13 19:55:44,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 733 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 733 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:44,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:55:44,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:44,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:55:44,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:45,009 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:45,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133909182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:45,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:45,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-07-13 19:55:45,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129588130] [2021-07-13 19:55:45,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:55:45,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:45,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:55:45,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:55:45,010 INFO L87 Difference]: Start difference. First operand 250 states and 593 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:45,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:45,812 INFO L93 Difference]: Finished difference Result 549 states and 1151 transitions. [2021-07-13 19:55:45,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:55:45,812 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:55:45,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:45,813 INFO L225 Difference]: With dead ends: 549 [2021-07-13 19:55:45,813 INFO L226 Difference]: Without dead ends: 542 [2021-07-13 19:55:45,813 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 813.4ms TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:55:45,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-07-13 19:55:45,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 253. [2021-07-13 19:55:45,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.3968253968253967) internal successors, (604), 252 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:45,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 604 transitions. [2021-07-13 19:55:45,817 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 604 transitions. Word has length 20 [2021-07-13 19:55:45,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:45,817 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 604 transitions. [2021-07-13 19:55:45,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:45,817 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 604 transitions. [2021-07-13 19:55:45,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:55:45,817 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:45,817 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:46,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 733 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18122 [2021-07-13 19:55:46,018 INFO L430 AbstractCegarLoop]: === Iteration 751 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:46,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:46,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1237819025, now seen corresponding path program 730 times [2021-07-13 19:55:46,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:46,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491088900] [2021-07-13 19:55:46,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:46,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:46,306 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:46,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:46,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491088900] [2021-07-13 19:55:46,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491088900] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:46,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107568304] [2021-07-13 19:55:46,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 734 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 734 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:46,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:55:46,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:46,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:55:46,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:46,704 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:46,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107568304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:46,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:46,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-13 19:55:46,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654353973] [2021-07-13 19:55:46,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:55:46,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:46,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:55:46,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:55:46,705 INFO L87 Difference]: Start difference. First operand 253 states and 604 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:47,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:47,241 INFO L93 Difference]: Finished difference Result 431 states and 953 transitions. [2021-07-13 19:55:47,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:55:47,242 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:55:47,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:47,242 INFO L225 Difference]: With dead ends: 431 [2021-07-13 19:55:47,242 INFO L226 Difference]: Without dead ends: 424 [2021-07-13 19:55:47,242 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 758.0ms TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:55:47,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-07-13 19:55:47,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 257. [2021-07-13 19:55:47,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.40625) internal successors, (616), 256 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:47,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 616 transitions. [2021-07-13 19:55:47,245 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 616 transitions. Word has length 20 [2021-07-13 19:55:47,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:47,245 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 616 transitions. [2021-07-13 19:55:47,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:47,246 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 616 transitions. [2021-07-13 19:55:47,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:55:47,246 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:47,246 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:47,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 734 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18169 [2021-07-13 19:55:47,446 INFO L430 AbstractCegarLoop]: === Iteration 752 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:47,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:47,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1365563635, now seen corresponding path program 731 times [2021-07-13 19:55:47,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:47,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151287904] [2021-07-13 19:55:47,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:47,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:47,629 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:47,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:47,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151287904] [2021-07-13 19:55:47,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151287904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:47,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961742746] [2021-07-13 19:55:47,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 735 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 735 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:47,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:55:47,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:47,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:55:47,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:47,976 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:47,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961742746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:47,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:47,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-07-13 19:55:47,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763468582] [2021-07-13 19:55:47,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:55:47,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:47,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:55:47,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:55:47,977 INFO L87 Difference]: Start difference. First operand 257 states and 616 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:48,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:48,718 INFO L93 Difference]: Finished difference Result 556 states and 1172 transitions. [2021-07-13 19:55:48,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:55:48,719 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:55:48,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:48,719 INFO L225 Difference]: With dead ends: 556 [2021-07-13 19:55:48,719 INFO L226 Difference]: Without dead ends: 549 [2021-07-13 19:55:48,720 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 738.6ms TimeCoverageRelationStatistics Valid=125, Invalid=1065, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:55:48,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-07-13 19:55:48,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 257. [2021-07-13 19:55:48,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.40625) internal successors, (616), 256 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:48,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 616 transitions. [2021-07-13 19:55:48,723 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 616 transitions. Word has length 20 [2021-07-13 19:55:48,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:48,723 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 616 transitions. [2021-07-13 19:55:48,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:48,723 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 616 transitions. [2021-07-13 19:55:48,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:55:48,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:48,724 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:48,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 735 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18204 [2021-07-13 19:55:48,924 INFO L430 AbstractCegarLoop]: === Iteration 753 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:48,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:48,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1768909961, now seen corresponding path program 732 times [2021-07-13 19:55:48,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:48,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828036006] [2021-07-13 19:55:48,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:48,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:49,072 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:49,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:49,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828036006] [2021-07-13 19:55:49,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828036006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:49,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115855700] [2021-07-13 19:55:49,073 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 736 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 736 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:49,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:55:49,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:49,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:55:49,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:49,460 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:49,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115855700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:49,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:49,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-07-13 19:55:49,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496100327] [2021-07-13 19:55:49,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:55:49,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:49,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:55:49,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:55:49,461 INFO L87 Difference]: Start difference. First operand 257 states and 616 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:50,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:50,238 INFO L93 Difference]: Finished difference Result 598 states and 1288 transitions. [2021-07-13 19:55:50,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:55:50,238 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:55:50,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:50,239 INFO L225 Difference]: With dead ends: 598 [2021-07-13 19:55:50,239 INFO L226 Difference]: Without dead ends: 591 [2021-07-13 19:55:50,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 714.8ms TimeCoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:55:50,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-07-13 19:55:50,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 292. [2021-07-13 19:55:50,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.443298969072165) internal successors, (711), 291 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:50,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 711 transitions. [2021-07-13 19:55:50,243 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 711 transitions. Word has length 20 [2021-07-13 19:55:50,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:50,243 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 711 transitions. [2021-07-13 19:55:50,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:50,243 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 711 transitions. [2021-07-13 19:55:50,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:55:50,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:50,243 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:50,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18239,736 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:50,444 INFO L430 AbstractCegarLoop]: === Iteration 754 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:50,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:50,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1825564347, now seen corresponding path program 733 times [2021-07-13 19:55:50,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:50,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852967587] [2021-07-13 19:55:50,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:50,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:50,600 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:50,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:50,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852967587] [2021-07-13 19:55:50,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852967587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:50,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669759539] [2021-07-13 19:55:50,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 737 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 737 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:50,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:50,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:55:50,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:50,929 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:50,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669759539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:50,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:50,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-07-13 19:55:50,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520271716] [2021-07-13 19:55:50,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:55:50,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:50,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:55:50,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:55:50,930 INFO L87 Difference]: Start difference. First operand 292 states and 711 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:51,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:51,703 INFO L93 Difference]: Finished difference Result 620 states and 1327 transitions. [2021-07-13 19:55:51,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:55:51,703 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:55:51,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:51,704 INFO L225 Difference]: With dead ends: 620 [2021-07-13 19:55:51,704 INFO L226 Difference]: Without dead ends: 613 [2021-07-13 19:55:51,704 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 693.7ms TimeCoverageRelationStatistics Valid=138, Invalid=1122, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:55:51,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-07-13 19:55:51,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 293. [2021-07-13 19:55:51,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.4486301369863015) internal successors, (715), 292 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:51,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 715 transitions. [2021-07-13 19:55:51,708 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 715 transitions. Word has length 20 [2021-07-13 19:55:51,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:51,708 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 715 transitions. [2021-07-13 19:55:51,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:51,708 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 715 transitions. [2021-07-13 19:55:51,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:55:51,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:51,709 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:51,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18285,737 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:51,909 INFO L430 AbstractCegarLoop]: === Iteration 755 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:51,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:51,909 INFO L82 PathProgramCache]: Analyzing trace with hash -777818313, now seen corresponding path program 734 times [2021-07-13 19:55:51,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:51,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617230492] [2021-07-13 19:55:51,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:51,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:52,072 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:52,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:52,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617230492] [2021-07-13 19:55:52,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617230492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:52,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754463441] [2021-07-13 19:55:52,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 738 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 738 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:52,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:55:52,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:52,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:55:52,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:52,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:52,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:52,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-13 19:55:52,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:52,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:52,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:52,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-13 19:55:52,432 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:52,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:52,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:52,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-07-13 19:55:52,440 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:52,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:52,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:52,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-13 19:55:52,447 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:52,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:52,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:52,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-13 19:55:52,454 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:52,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:52,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:55:52,460 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:52,615 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 55 [2021-07-13 19:55:52,616 INFO L628 ElimStorePlain]: treesize reduction 678, result has 13.0 percent of original size [2021-07-13 19:55:52,616 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:55:52,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:55:52,625 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:52,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:52,667 INFO L518 ElimStorePlain]: Eliminatee v_prenex_892 vanished before elimination [2021-07-13 19:55:52,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:55:52,670 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:52,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:52,702 INFO L518 ElimStorePlain]: Eliminatee v_prenex_895 vanished before elimination [2021-07-13 19:55:52,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:55:52,703 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:949, output treesize:85 [2021-07-13 19:55:52,866 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:52,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754463441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:52,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:52,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-13 19:55:52,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984767668] [2021-07-13 19:55:52,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:55:52,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:52,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:55:52,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:55:52,867 INFO L87 Difference]: Start difference. First operand 293 states and 715 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:54,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:54,003 INFO L93 Difference]: Finished difference Result 628 states and 1346 transitions. [2021-07-13 19:55:54,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:55:54,003 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:55:54,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:54,004 INFO L225 Difference]: With dead ends: 628 [2021-07-13 19:55:54,004 INFO L226 Difference]: Without dead ends: 614 [2021-07-13 19:55:54,004 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1069.3ms TimeCoverageRelationStatistics Valid=178, Invalid=1544, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:55:54,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-07-13 19:55:54,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 292. [2021-07-13 19:55:54,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.443298969072165) internal successors, (711), 291 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:54,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 711 transitions. [2021-07-13 19:55:54,008 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 711 transitions. Word has length 20 [2021-07-13 19:55:54,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:54,008 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 711 transitions. [2021-07-13 19:55:54,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:54,008 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 711 transitions. [2021-07-13 19:55:54,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:55:54,008 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:54,008 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:54,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 738 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18333 [2021-07-13 19:55:54,209 INFO L430 AbstractCegarLoop]: === Iteration 756 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:54,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:54,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1290334545, now seen corresponding path program 735 times [2021-07-13 19:55:54,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:54,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090923687] [2021-07-13 19:55:54,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:54,355 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:54,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:54,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090923687] [2021-07-13 19:55:54,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090923687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:54,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639264106] [2021-07-13 19:55:54,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 739 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 739 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:54,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:55:54,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:54,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:55:54,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:54,740 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:54,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639264106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:54,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:54,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-07-13 19:55:54,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24369944] [2021-07-13 19:55:54,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:55:54,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:54,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:55:54,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:55:54,741 INFO L87 Difference]: Start difference. First operand 292 states and 711 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:55,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:55,441 INFO L93 Difference]: Finished difference Result 620 states and 1330 transitions. [2021-07-13 19:55:55,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:55:55,441 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:55:55,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:55,442 INFO L225 Difference]: With dead ends: 620 [2021-07-13 19:55:55,442 INFO L226 Difference]: Without dead ends: 613 [2021-07-13 19:55:55,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 519.7ms TimeCoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:55:55,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-07-13 19:55:55,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 295. [2021-07-13 19:55:55,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.45578231292517) internal successors, (722), 294 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:55,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 722 transitions. [2021-07-13 19:55:55,446 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 722 transitions. Word has length 20 [2021-07-13 19:55:55,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:55,446 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 722 transitions. [2021-07-13 19:55:55,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:55,446 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 722 transitions. [2021-07-13 19:55:55,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:55:55,446 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:55,447 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:55,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18383,739 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:55,647 INFO L430 AbstractCegarLoop]: === Iteration 757 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:55,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:55,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1313048115, now seen corresponding path program 736 times [2021-07-13 19:55:55,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:55,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846751692] [2021-07-13 19:55:55,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:55,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:55,796 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:55,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:55,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846751692] [2021-07-13 19:55:55,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846751692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:55,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091198547] [2021-07-13 19:55:55,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 740 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 740 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:55,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:55:55,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:55,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:55:55,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:56,201 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:56,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091198547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:56,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:56,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-07-13 19:55:56,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822421474] [2021-07-13 19:55:56,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:55:56,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:56,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:55:56,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:55:56,202 INFO L87 Difference]: Start difference. First operand 295 states and 722 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:56,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:56,890 INFO L93 Difference]: Finished difference Result 622 states and 1332 transitions. [2021-07-13 19:55:56,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:55:56,891 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:55:56,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:56,892 INFO L225 Difference]: With dead ends: 622 [2021-07-13 19:55:56,892 INFO L226 Difference]: Without dead ends: 615 [2021-07-13 19:55:56,892 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 537.1ms TimeCoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:55:56,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-07-13 19:55:56,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 294. [2021-07-13 19:55:56,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.4505119453924915) internal successors, (718), 293 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:56,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 718 transitions. [2021-07-13 19:55:56,896 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 718 transitions. Word has length 20 [2021-07-13 19:55:56,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:56,896 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 718 transitions. [2021-07-13 19:55:56,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:56,896 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 718 transitions. [2021-07-13 19:55:56,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:55:56,896 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:56,896 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:57,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 740 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18482 [2021-07-13 19:55:57,097 INFO L430 AbstractCegarLoop]: === Iteration 758 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:57,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:57,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1139800423, now seen corresponding path program 737 times [2021-07-13 19:55:57,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:57,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824178105] [2021-07-13 19:55:57,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:57,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:57,248 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:57,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:57,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824178105] [2021-07-13 19:55:57,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824178105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:57,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005786995] [2021-07-13 19:55:57,249 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 741 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 741 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:57,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:55:57,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:57,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:55:57,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:57,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005786995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:57,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:57,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-07-13 19:55:57,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371651490] [2021-07-13 19:55:57,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:55:57,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:57,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:55:57,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:55:57,732 INFO L87 Difference]: Start difference. First operand 294 states and 718 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:58,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:58,371 INFO L93 Difference]: Finished difference Result 599 states and 1292 transitions. [2021-07-13 19:55:58,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:55:58,372 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:55:58,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:58,372 INFO L225 Difference]: With dead ends: 599 [2021-07-13 19:55:58,373 INFO L226 Difference]: Without dead ends: 592 [2021-07-13 19:55:58,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 595.1ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:55:58,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-07-13 19:55:58,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 294. [2021-07-13 19:55:58,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.4505119453924915) internal successors, (718), 293 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:58,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 718 transitions. [2021-07-13 19:55:58,376 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 718 transitions. Word has length 20 [2021-07-13 19:55:58,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:58,376 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 718 transitions. [2021-07-13 19:55:58,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:58,376 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 718 transitions. [2021-07-13 19:55:58,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:55:58,377 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:58,377 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:58,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18581,741 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:58,577 INFO L430 AbstractCegarLoop]: === Iteration 759 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:58,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:58,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1265437, now seen corresponding path program 738 times [2021-07-13 19:55:58,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:58,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835179389] [2021-07-13 19:55:58,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:58,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:58,978 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:58,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:58,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835179389] [2021-07-13 19:55:58,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835179389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:58,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487895101] [2021-07-13 19:55:58,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 742 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 742 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:59,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:55:59,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:59,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 19:55:59,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:59,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:59,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:59,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-07-13 19:55:59,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:59,672 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:55:59,672 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:59,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:59,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:59,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:55:59,680 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:59,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:59,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:59,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-13 19:55:59,687 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:59,693 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:55:59,693 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:59,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:59,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-13 19:55:59,700 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:59,889 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 61 [2021-07-13 19:55:59,890 INFO L628 ElimStorePlain]: treesize reduction 935, result has 11.0 percent of original size [2021-07-13 19:55:59,890 INFO L518 ElimStorePlain]: Eliminatee v_prenex_902 vanished before elimination [2021-07-13 19:55:59,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:55:59,894 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:59,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:59,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:55:59,938 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:59,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:59,981 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:55:59,981 INFO L518 ElimStorePlain]: Eliminatee v_prenex_904 vanished before elimination [2021-07-13 19:55:59,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-13 19:55:59,984 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:00,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:00,021 INFO L518 ElimStorePlain]: Eliminatee v_prenex_906 vanished before elimination [2021-07-13 19:56:00,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:56:00,023 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1201, output treesize:77 [2021-07-13 19:56:00,131 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:00,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487895101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:00,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:00,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-13 19:56:00,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996322733] [2021-07-13 19:56:00,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:56:00,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:00,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:56:00,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:56:00,132 INFO L87 Difference]: Start difference. First operand 294 states and 718 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:00,427 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2021-07-13 19:56:00,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:00,863 INFO L93 Difference]: Finished difference Result 536 states and 1162 transitions. [2021-07-13 19:56:00,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:56:00,863 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:56:00,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:00,864 INFO L225 Difference]: With dead ends: 536 [2021-07-13 19:56:00,864 INFO L226 Difference]: Without dead ends: 522 [2021-07-13 19:56:00,864 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1153.3ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:56:00,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-07-13 19:56:00,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 318. [2021-07-13 19:56:00,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.4574132492113563) internal successors, (779), 317 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:00,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 779 transitions. [2021-07-13 19:56:00,872 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 779 transitions. Word has length 20 [2021-07-13 19:56:00,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:00,872 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 779 transitions. [2021-07-13 19:56:00,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:00,872 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 779 transitions. [2021-07-13 19:56:00,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:56:00,872 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:00,872 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:01,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18704,742 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:01,073 INFO L430 AbstractCegarLoop]: === Iteration 760 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:01,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:01,073 INFO L82 PathProgramCache]: Analyzing trace with hash 858220319, now seen corresponding path program 739 times [2021-07-13 19:56:01,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:01,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773147718] [2021-07-13 19:56:01,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:01,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:01,269 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:01,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:01,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773147718] [2021-07-13 19:56:01,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773147718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:01,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658167634] [2021-07-13 19:56:01,269 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 743 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 743 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:01,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:01,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:56:01,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:01,767 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:01,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658167634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:01,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:01,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-07-13 19:56:01,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291301115] [2021-07-13 19:56:01,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:56:01,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:01,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:56:01,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:56:01,768 INFO L87 Difference]: Start difference. First operand 318 states and 779 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:02,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:02,526 INFO L93 Difference]: Finished difference Result 571 states and 1225 transitions. [2021-07-13 19:56:02,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:56:02,526 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:56:02,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:02,527 INFO L225 Difference]: With dead ends: 571 [2021-07-13 19:56:02,527 INFO L226 Difference]: Without dead ends: 564 [2021-07-13 19:56:02,527 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 789.4ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:56:02,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-07-13 19:56:02,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 322. [2021-07-13 19:56:02,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.467289719626168) internal successors, (792), 321 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:02,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 792 transitions. [2021-07-13 19:56:02,531 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 792 transitions. Word has length 20 [2021-07-13 19:56:02,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:02,531 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 792 transitions. [2021-07-13 19:56:02,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:02,531 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 792 transitions. [2021-07-13 19:56:02,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:56:02,532 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:02,532 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:02,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18752,743 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:02,732 INFO L430 AbstractCegarLoop]: === Iteration 761 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:02,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:02,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1994324323, now seen corresponding path program 740 times [2021-07-13 19:56:02,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:02,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441404275] [2021-07-13 19:56:02,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:02,953 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:02,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:02,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441404275] [2021-07-13 19:56:02,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441404275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:02,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965958301] [2021-07-13 19:56:02,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 744 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 744 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:02,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:56:02,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:02,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:56:02,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:03,464 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:03,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965958301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:03,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:03,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-13 19:56:03,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067169546] [2021-07-13 19:56:03,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:56:03,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:03,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:56:03,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:56:03,465 INFO L87 Difference]: Start difference. First operand 322 states and 792 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:04,000 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-07-13 19:56:04,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:04,415 INFO L93 Difference]: Finished difference Result 567 states and 1222 transitions. [2021-07-13 19:56:04,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:56:04,415 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:56:04,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:04,416 INFO L225 Difference]: With dead ends: 567 [2021-07-13 19:56:04,416 INFO L226 Difference]: Without dead ends: 560 [2021-07-13 19:56:04,416 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 904.2ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:56:04,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-07-13 19:56:04,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 325. [2021-07-13 19:56:04,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.4753086419753085) internal successors, (802), 324 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:04,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 802 transitions. [2021-07-13 19:56:04,420 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 802 transitions. Word has length 20 [2021-07-13 19:56:04,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:04,420 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 802 transitions. [2021-07-13 19:56:04,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:04,420 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 802 transitions. [2021-07-13 19:56:04,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:56:04,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:04,420 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:04,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 744 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18799 [2021-07-13 19:56:04,621 INFO L430 AbstractCegarLoop]: === Iteration 762 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:04,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:04,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1753878175, now seen corresponding path program 741 times [2021-07-13 19:56:04,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:04,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571187055] [2021-07-13 19:56:04,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:04,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:04,978 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:04,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:04,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571187055] [2021-07-13 19:56:04,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571187055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:04,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115217713] [2021-07-13 19:56:04,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 745 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 745 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:05,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:56:05,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:05,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:56:05,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:05,482 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:05,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115217713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:05,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:05,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-13 19:56:05,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787034793] [2021-07-13 19:56:05,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:56:05,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:05,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:56:05,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:56:05,483 INFO L87 Difference]: Start difference. First operand 325 states and 802 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:06,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:06,581 INFO L93 Difference]: Finished difference Result 573 states and 1249 transitions. [2021-07-13 19:56:06,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:56:06,581 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:56:06,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:06,582 INFO L225 Difference]: With dead ends: 573 [2021-07-13 19:56:06,582 INFO L226 Difference]: Without dead ends: 566 [2021-07-13 19:56:06,582 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1234.1ms TimeCoverageRelationStatistics Valid=93, Invalid=899, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:56:06,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-07-13 19:56:06,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 327. [2021-07-13 19:56:06,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.48159509202454) internal successors, (809), 326 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:06,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 809 transitions. [2021-07-13 19:56:06,586 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 809 transitions. Word has length 20 [2021-07-13 19:56:06,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:06,586 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 809 transitions. [2021-07-13 19:56:06,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:06,586 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 809 transitions. [2021-07-13 19:56:06,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:56:06,586 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:06,586 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:06,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18845,745 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:06,787 INFO L430 AbstractCegarLoop]: === Iteration 763 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:06,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:06,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1053385187, now seen corresponding path program 742 times [2021-07-13 19:56:06,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:06,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506207295] [2021-07-13 19:56:06,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:06,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:07,095 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:07,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:07,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506207295] [2021-07-13 19:56:07,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506207295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:07,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509613126] [2021-07-13 19:56:07,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 746 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 746 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:07,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:56:07,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:07,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:56:07,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:07,568 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:07,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509613126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:07,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:07,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-07-13 19:56:07,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870526990] [2021-07-13 19:56:07,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:56:07,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:07,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:56:07,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:56:07,569 INFO L87 Difference]: Start difference. First operand 327 states and 809 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:08,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:08,257 INFO L93 Difference]: Finished difference Result 570 states and 1244 transitions. [2021-07-13 19:56:08,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:56:08,257 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:56:08,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:08,258 INFO L225 Difference]: With dead ends: 570 [2021-07-13 19:56:08,258 INFO L226 Difference]: Without dead ends: 563 [2021-07-13 19:56:08,258 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 776.3ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:56:08,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-07-13 19:56:08,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 328. [2021-07-13 19:56:08,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.4862385321100917) internal successors, (813), 327 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:08,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 813 transitions. [2021-07-13 19:56:08,262 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 813 transitions. Word has length 20 [2021-07-13 19:56:08,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:08,262 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 813 transitions. [2021-07-13 19:56:08,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:08,262 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 813 transitions. [2021-07-13 19:56:08,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:56:08,262 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:08,262 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:08,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18880,746 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:08,463 INFO L430 AbstractCegarLoop]: === Iteration 764 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:08,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:08,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1549997473, now seen corresponding path program 743 times [2021-07-13 19:56:08,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:08,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252136883] [2021-07-13 19:56:08,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:08,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:08,898 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:08,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:08,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252136883] [2021-07-13 19:56:08,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252136883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:08,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211495907] [2021-07-13 19:56:08,898 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 747 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 747 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:08,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:56:08,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:08,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:56:08,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:09,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211495907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:09,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:09,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-13 19:56:09,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659658845] [2021-07-13 19:56:09,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:56:09,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:09,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:56:09,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:56:09,397 INFO L87 Difference]: Start difference. First operand 328 states and 813 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:10,548 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 36 [2021-07-13 19:56:10,711 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2021-07-13 19:56:10,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:10,845 INFO L93 Difference]: Finished difference Result 555 states and 1221 transitions. [2021-07-13 19:56:10,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:56:10,845 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:56:10,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:10,846 INFO L225 Difference]: With dead ends: 555 [2021-07-13 19:56:10,846 INFO L226 Difference]: Without dead ends: 548 [2021-07-13 19:56:10,846 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1621.0ms TimeCoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:56:10,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-07-13 19:56:10,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 323. [2021-07-13 19:56:10,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.4751552795031055) internal successors, (797), 322 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:10,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 797 transitions. [2021-07-13 19:56:10,850 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 797 transitions. Word has length 20 [2021-07-13 19:56:10,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:10,850 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 797 transitions. [2021-07-13 19:56:10,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:10,850 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 797 transitions. [2021-07-13 19:56:10,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:56:10,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:10,850 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:11,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 747 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18931 [2021-07-13 19:56:11,051 INFO L430 AbstractCegarLoop]: === Iteration 765 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:11,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:11,051 INFO L82 PathProgramCache]: Analyzing trace with hash -18807645, now seen corresponding path program 744 times [2021-07-13 19:56:11,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:11,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34600492] [2021-07-13 19:56:11,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:11,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:11,198 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:11,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:11,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34600492] [2021-07-13 19:56:11,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34600492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:11,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316829335] [2021-07-13 19:56:11,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 748 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 748 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:11,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:56:11,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:11,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:56:11,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:11,557 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:11,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316829335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:11,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:11,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 19 [2021-07-13 19:56:11,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605652964] [2021-07-13 19:56:11,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:56:11,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:11,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:56:11,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:56:11,558 INFO L87 Difference]: Start difference. First operand 323 states and 797 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:12,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:12,302 INFO L93 Difference]: Finished difference Result 593 states and 1331 transitions. [2021-07-13 19:56:12,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:56:12,302 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:56:12,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:12,303 INFO L225 Difference]: With dead ends: 593 [2021-07-13 19:56:12,303 INFO L226 Difference]: Without dead ends: 586 [2021-07-13 19:56:12,303 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 654.7ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:56:12,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-07-13 19:56:12,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 339. [2021-07-13 19:56:12,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.529585798816568) internal successors, (855), 338 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:12,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 855 transitions. [2021-07-13 19:56:12,307 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 855 transitions. Word has length 20 [2021-07-13 19:56:12,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:12,307 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 855 transitions. [2021-07-13 19:56:12,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:12,307 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 855 transitions. [2021-07-13 19:56:12,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:56:12,308 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:12,308 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:12,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18965,748 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:12,508 INFO L430 AbstractCegarLoop]: === Iteration 766 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:12,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:12,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1979980895, now seen corresponding path program 745 times [2021-07-13 19:56:12,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:12,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119224855] [2021-07-13 19:56:12,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:12,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:12,840 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:12,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:12,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119224855] [2021-07-13 19:56:12,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119224855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:12,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801658170] [2021-07-13 19:56:12,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 749 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 749 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:12,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:12,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:56:12,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:13,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801658170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:13,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:13,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-07-13 19:56:13,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942112318] [2021-07-13 19:56:13,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:56:13,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:13,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:56:13,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:56:13,389 INFO L87 Difference]: Start difference. First operand 339 states and 855 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:14,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:14,175 INFO L93 Difference]: Finished difference Result 453 states and 1076 transitions. [2021-07-13 19:56:14,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:56:14,176 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:56:14,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:14,176 INFO L225 Difference]: With dead ends: 453 [2021-07-13 19:56:14,176 INFO L226 Difference]: Without dead ends: 446 [2021-07-13 19:56:14,176 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1079.2ms TimeCoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:56:14,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-07-13 19:56:14,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 340. [2021-07-13 19:56:14,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.5309734513274336) internal successors, (858), 339 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:14,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 858 transitions. [2021-07-13 19:56:14,180 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 858 transitions. Word has length 20 [2021-07-13 19:56:14,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:14,180 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 858 transitions. [2021-07-13 19:56:14,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:14,180 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 858 transitions. [2021-07-13 19:56:14,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:56:14,180 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:14,180 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:14,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19011,749 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:14,381 INFO L430 AbstractCegarLoop]: === Iteration 767 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:14,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:14,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1178882397, now seen corresponding path program 746 times [2021-07-13 19:56:14,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:14,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732895683] [2021-07-13 19:56:14,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:14,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:14,554 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:14,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:14,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732895683] [2021-07-13 19:56:14,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732895683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:14,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928576538] [2021-07-13 19:56:14,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 750 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 750 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:14,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:56:14,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:14,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:56:14,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:14,990 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:14,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928576538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:14,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:14,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-07-13 19:56:14,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366232841] [2021-07-13 19:56:14,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:56:14,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:14,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:56:14,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:56:14,991 INFO L87 Difference]: Start difference. First operand 340 states and 858 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:15,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:15,567 INFO L93 Difference]: Finished difference Result 462 states and 1094 transitions. [2021-07-13 19:56:15,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:56:15,568 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:56:15,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:15,568 INFO L225 Difference]: With dead ends: 462 [2021-07-13 19:56:15,568 INFO L226 Difference]: Without dead ends: 455 [2021-07-13 19:56:15,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 683.4ms TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:56:15,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-07-13 19:56:15,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 341. [2021-07-13 19:56:15,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.5323529411764705) internal successors, (861), 340 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:15,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 861 transitions. [2021-07-13 19:56:15,572 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 861 transitions. Word has length 20 [2021-07-13 19:56:15,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:15,572 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 861 transitions. [2021-07-13 19:56:15,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:15,572 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 861 transitions. [2021-07-13 19:56:15,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:56:15,572 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:15,573 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:15,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 750 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19058 [2021-07-13 19:56:15,773 INFO L430 AbstractCegarLoop]: === Iteration 768 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:15,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:15,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1419328545, now seen corresponding path program 747 times [2021-07-13 19:56:15,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:15,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732839843] [2021-07-13 19:56:15,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:15,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:15,936 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:15,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:15,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732839843] [2021-07-13 19:56:15,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732839843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:15,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150854631] [2021-07-13 19:56:15,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 751 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 751 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:15,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:56:15,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:15,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:56:15,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:16,390 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:16,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150854631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:16,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:16,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-07-13 19:56:16,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555258589] [2021-07-13 19:56:16,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:56:16,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:16,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:56:16,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:56:16,391 INFO L87 Difference]: Start difference. First operand 341 states and 861 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:17,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:17,036 INFO L93 Difference]: Finished difference Result 465 states and 1102 transitions. [2021-07-13 19:56:17,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:56:17,036 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:56:17,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:17,037 INFO L225 Difference]: With dead ends: 465 [2021-07-13 19:56:17,037 INFO L226 Difference]: Without dead ends: 458 [2021-07-13 19:56:17,037 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 695.2ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:56:17,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-07-13 19:56:17,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 342. [2021-07-13 19:56:17,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.533724340175953) internal successors, (864), 341 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:17,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 864 transitions. [2021-07-13 19:56:17,041 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 864 transitions. Word has length 20 [2021-07-13 19:56:17,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:17,041 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 864 transitions. [2021-07-13 19:56:17,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:17,041 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 864 transitions. [2021-07-13 19:56:17,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:56:17,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:17,041 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:17,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19092,751 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:17,242 INFO L430 AbstractCegarLoop]: === Iteration 769 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:17,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:17,242 INFO L82 PathProgramCache]: Analyzing trace with hash -2119821533, now seen corresponding path program 748 times [2021-07-13 19:56:17,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:17,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350204683] [2021-07-13 19:56:17,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:17,527 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:17,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:17,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350204683] [2021-07-13 19:56:17,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350204683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:17,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147467954] [2021-07-13 19:56:17,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 752 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 752 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:17,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:56:17,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:17,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:56:17,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:17,948 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:17,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147467954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:17,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:17,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-07-13 19:56:17,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047039626] [2021-07-13 19:56:17,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:56:17,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:17,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:56:17,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:56:17,949 INFO L87 Difference]: Start difference. First operand 342 states and 864 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:18,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:18,550 INFO L93 Difference]: Finished difference Result 477 states and 1122 transitions. [2021-07-13 19:56:18,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:56:18,550 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:56:18,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:18,551 INFO L225 Difference]: With dead ends: 477 [2021-07-13 19:56:18,551 INFO L226 Difference]: Without dead ends: 470 [2021-07-13 19:56:18,551 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 754.2ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:56:18,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-07-13 19:56:18,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 343. [2021-07-13 19:56:18,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.538011695906433) internal successors, (868), 342 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:18,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 868 transitions. [2021-07-13 19:56:18,555 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 868 transitions. Word has length 20 [2021-07-13 19:56:18,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:18,555 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 868 transitions. [2021-07-13 19:56:18,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:18,555 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 868 transitions. [2021-07-13 19:56:18,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:56:18,555 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:18,555 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:18,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 752 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19139 [2021-07-13 19:56:18,756 INFO L430 AbstractCegarLoop]: === Iteration 770 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:18,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:18,756 INFO L82 PathProgramCache]: Analyzing trace with hash -428236897, now seen corresponding path program 749 times [2021-07-13 19:56:18,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:18,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338344448] [2021-07-13 19:56:18,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:18,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:18,946 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:18,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:18,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338344448] [2021-07-13 19:56:18,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338344448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:18,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927297801] [2021-07-13 19:56:18,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 753 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 753 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:18,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:56:18,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:18,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:56:18,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:19,349 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:19,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927297801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:19,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:19,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 19 [2021-07-13 19:56:19,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443977793] [2021-07-13 19:56:19,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:56:19,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:19,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:56:19,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:56:19,350 INFO L87 Difference]: Start difference. First operand 343 states and 868 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:19,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:19,855 INFO L93 Difference]: Finished difference Result 465 states and 1104 transitions. [2021-07-13 19:56:19,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:56:19,855 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:56:19,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:19,856 INFO L225 Difference]: With dead ends: 465 [2021-07-13 19:56:19,856 INFO L226 Difference]: Without dead ends: 458 [2021-07-13 19:56:19,856 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 622.8ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:56:19,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-07-13 19:56:19,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 340. [2021-07-13 19:56:19,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.5309734513274336) internal successors, (858), 339 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:19,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 858 transitions. [2021-07-13 19:56:19,859 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 858 transitions. Word has length 20 [2021-07-13 19:56:19,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:19,859 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 858 transitions. [2021-07-13 19:56:19,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:19,859 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 858 transitions. [2021-07-13 19:56:19,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:56:19,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:19,860 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:20,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19186,753 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:20,060 INFO L430 AbstractCegarLoop]: === Iteration 771 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:20,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:20,061 INFO L82 PathProgramCache]: Analyzing trace with hash 2043892067, now seen corresponding path program 750 times [2021-07-13 19:56:20,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:20,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120995840] [2021-07-13 19:56:20,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:20,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:20,297 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:20,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:20,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120995840] [2021-07-13 19:56:20,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120995840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:20,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017718837] [2021-07-13 19:56:20,297 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 754 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 754 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:20,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:56:20,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:20,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:56:20,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:20,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017718837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:20,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:20,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 21 [2021-07-13 19:56:20,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772635336] [2021-07-13 19:56:20,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:56:20,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:20,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:56:20,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:56:20,720 INFO L87 Difference]: Start difference. First operand 340 states and 858 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:21,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:21,412 INFO L93 Difference]: Finished difference Result 520 states and 1189 transitions. [2021-07-13 19:56:21,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:56:21,413 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:56:21,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:21,413 INFO L225 Difference]: With dead ends: 520 [2021-07-13 19:56:21,413 INFO L226 Difference]: Without dead ends: 513 [2021-07-13 19:56:21,413 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 859.1ms TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:56:21,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-07-13 19:56:21,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 343. [2021-07-13 19:56:21,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.5321637426900585) internal successors, (866), 342 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:21,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 866 transitions. [2021-07-13 19:56:21,417 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 866 transitions. Word has length 20 [2021-07-13 19:56:21,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:21,417 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 866 transitions. [2021-07-13 19:56:21,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:21,417 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 866 transitions. [2021-07-13 19:56:21,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:56:21,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:21,418 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:21,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 754 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19232 [2021-07-13 19:56:21,618 INFO L430 AbstractCegarLoop]: === Iteration 772 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:21,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:21,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1803445919, now seen corresponding path program 751 times [2021-07-13 19:56:21,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:21,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282491469] [2021-07-13 19:56:21,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:21,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:21,789 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:21,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:21,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282491469] [2021-07-13 19:56:21,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282491469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:21,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826555534] [2021-07-13 19:56:21,790 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 755 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 755 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:21,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:56:21,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:22,196 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:22,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826555534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:22,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:22,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-07-13 19:56:22,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474440847] [2021-07-13 19:56:22,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:56:22,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:22,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:56:22,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:56:22,197 INFO L87 Difference]: Start difference. First operand 343 states and 866 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:23,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:23,028 INFO L93 Difference]: Finished difference Result 530 states and 1208 transitions. [2021-07-13 19:56:23,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:56:23,029 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:56:23,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:23,029 INFO L225 Difference]: With dead ends: 530 [2021-07-13 19:56:23,029 INFO L226 Difference]: Without dead ends: 523 [2021-07-13 19:56:23,030 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 837.4ms TimeCoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:56:23,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-07-13 19:56:23,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 343. [2021-07-13 19:56:23,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.5321637426900585) internal successors, (866), 342 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:23,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 866 transitions. [2021-07-13 19:56:23,034 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 866 transitions. Word has length 20 [2021-07-13 19:56:23,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:23,034 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 866 transitions. [2021-07-13 19:56:23,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:23,034 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 866 transitions. [2021-07-13 19:56:23,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:56:23,034 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:23,034 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:23,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19266,755 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:23,235 INFO L430 AbstractCegarLoop]: === Iteration 773 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:23,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:23,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1102952931, now seen corresponding path program 752 times [2021-07-13 19:56:23,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:23,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899508660] [2021-07-13 19:56:23,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:23,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:23,494 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:23,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:23,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899508660] [2021-07-13 19:56:23,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899508660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:23,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143421173] [2021-07-13 19:56:23,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 756 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 756 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:23,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:56:23,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:23,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:56:23,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:23,898 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:23,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143421173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:23,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:23,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-07-13 19:56:23,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144823842] [2021-07-13 19:56:23,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:56:23,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:23,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:56:23,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:56:23,899 INFO L87 Difference]: Start difference. First operand 343 states and 866 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:24,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:24,844 INFO L93 Difference]: Finished difference Result 510 states and 1174 transitions. [2021-07-13 19:56:24,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:56:24,844 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:56:24,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:24,845 INFO L225 Difference]: With dead ends: 510 [2021-07-13 19:56:24,845 INFO L226 Difference]: Without dead ends: 500 [2021-07-13 19:56:24,845 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1044.9ms TimeCoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:56:24,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-07-13 19:56:24,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 340. [2021-07-13 19:56:24,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.533923303834808) internal successors, (859), 339 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:24,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 859 transitions. [2021-07-13 19:56:24,849 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 859 transitions. Word has length 20 [2021-07-13 19:56:24,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:24,849 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 859 transitions. [2021-07-13 19:56:24,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:24,849 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 859 transitions. [2021-07-13 19:56:24,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:56:24,849 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:24,849 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:25,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 756 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19300 [2021-07-13 19:56:25,050 INFO L430 AbstractCegarLoop]: === Iteration 774 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:25,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:25,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1500429729, now seen corresponding path program 753 times [2021-07-13 19:56:25,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:25,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613593] [2021-07-13 19:56:25,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:25,201 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:25,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:25,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613593] [2021-07-13 19:56:25,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:25,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874580232] [2021-07-13 19:56:25,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 757 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 757 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:25,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:56:25,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:25,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:56:25,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:25,667 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-07-13 19:56:25,786 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:25,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874580232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:25,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:25,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 19 [2021-07-13 19:56:25,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130423155] [2021-07-13 19:56:25,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:56:25,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:25,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:56:25,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:56:25,787 INFO L87 Difference]: Start difference. First operand 340 states and 859 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:26,422 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-07-13 19:56:26,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:26,609 INFO L93 Difference]: Finished difference Result 490 states and 1140 transitions. [2021-07-13 19:56:26,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:56:26,609 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:56:26,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:26,610 INFO L225 Difference]: With dead ends: 490 [2021-07-13 19:56:26,610 INFO L226 Difference]: Without dead ends: 483 [2021-07-13 19:56:26,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1056.5ms TimeCoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:56:26,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-07-13 19:56:26,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 340. [2021-07-13 19:56:26,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.533923303834808) internal successors, (859), 339 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:26,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 859 transitions. [2021-07-13 19:56:26,613 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 859 transitions. Word has length 20 [2021-07-13 19:56:26,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:26,614 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 859 transitions. [2021-07-13 19:56:26,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:26,614 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 859 transitions. [2021-07-13 19:56:26,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:56:26,614 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:26,614 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:26,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 757 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19334 [2021-07-13 19:56:26,815 INFO L430 AbstractCegarLoop]: === Iteration 775 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:26,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:26,815 INFO L82 PathProgramCache]: Analyzing trace with hash -863540257, now seen corresponding path program 754 times [2021-07-13 19:56:26,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:26,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220038667] [2021-07-13 19:56:26,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:26,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:26,961 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:26,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:26,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220038667] [2021-07-13 19:56:26,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220038667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:26,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470200906] [2021-07-13 19:56:26,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 758 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 758 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:26,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:56:26,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:26,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:56:26,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:27,347 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:27,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470200906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:27,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:27,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-07-13 19:56:27,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420473048] [2021-07-13 19:56:27,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:56:27,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:27,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:56:27,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:56:27,348 INFO L87 Difference]: Start difference. First operand 340 states and 859 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:28,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:28,125 INFO L93 Difference]: Finished difference Result 581 states and 1320 transitions. [2021-07-13 19:56:28,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:56:28,125 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:56:28,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:28,126 INFO L225 Difference]: With dead ends: 581 [2021-07-13 19:56:28,126 INFO L226 Difference]: Without dead ends: 574 [2021-07-13 19:56:28,126 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 684.9ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:56:28,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-07-13 19:56:28,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 360. [2021-07-13 19:56:28,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.5459610027855155) internal successors, (914), 359 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:28,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 914 transitions. [2021-07-13 19:56:28,130 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 914 transitions. Word has length 20 [2021-07-13 19:56:28,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:28,130 INFO L482 AbstractCegarLoop]: Abstraction has 360 states and 914 transitions. [2021-07-13 19:56:28,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:28,131 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 914 transitions. [2021-07-13 19:56:28,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:56:28,131 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:28,131 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:28,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 758 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19369 [2021-07-13 19:56:28,332 INFO L430 AbstractCegarLoop]: === Iteration 776 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:28,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:28,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1564033245, now seen corresponding path program 755 times [2021-07-13 19:56:28,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:28,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865570525] [2021-07-13 19:56:28,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:28,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:28,569 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:28,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:28,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865570525] [2021-07-13 19:56:28,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865570525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:28,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802032867] [2021-07-13 19:56:28,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 759 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 759 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:28,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:56:28,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:28,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:56:28,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:28,968 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:28,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802032867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:28,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:28,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-13 19:56:28,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115896352] [2021-07-13 19:56:28,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:56:28,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:28,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:56:28,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:56:28,969 INFO L87 Difference]: Start difference. First operand 360 states and 914 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:29,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:29,426 INFO L93 Difference]: Finished difference Result 482 states and 1149 transitions. [2021-07-13 19:56:29,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:56:29,427 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:56:29,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:29,427 INFO L225 Difference]: With dead ends: 482 [2021-07-13 19:56:29,427 INFO L226 Difference]: Without dead ends: 475 [2021-07-13 19:56:29,427 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 643.8ms TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:56:29,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-07-13 19:56:29,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 366. [2021-07-13 19:56:29,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.5452054794520547) internal successors, (929), 365 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:29,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 929 transitions. [2021-07-13 19:56:29,431 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 929 transitions. Word has length 20 [2021-07-13 19:56:29,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:29,431 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 929 transitions. [2021-07-13 19:56:29,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:29,432 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 929 transitions. [2021-07-13 19:56:29,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:56:29,432 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:29,432 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:29,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 759 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19415 [2021-07-13 19:56:29,633 INFO L430 AbstractCegarLoop]: === Iteration 777 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:29,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:29,633 INFO L82 PathProgramCache]: Analyzing trace with hash 127551391, now seen corresponding path program 756 times [2021-07-13 19:56:29,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:29,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202537559] [2021-07-13 19:56:29,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:29,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:29,890 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:29,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:29,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202537559] [2021-07-13 19:56:29,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202537559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:29,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11788115] [2021-07-13 19:56:29,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 760 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 760 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:29,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:56:29,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:29,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:56:29,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:30,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11788115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:30,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:30,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 21 [2021-07-13 19:56:30,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088783047] [2021-07-13 19:56:30,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:56:30,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:30,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:56:30,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:56:30,259 INFO L87 Difference]: Start difference. First operand 366 states and 929 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:31,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:31,130 INFO L93 Difference]: Finished difference Result 606 states and 1367 transitions. [2021-07-13 19:56:31,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:56:31,130 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:56:31,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:31,131 INFO L225 Difference]: With dead ends: 606 [2021-07-13 19:56:31,131 INFO L226 Difference]: Without dead ends: 599 [2021-07-13 19:56:31,131 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 908.3ms TimeCoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:56:31,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-07-13 19:56:31,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 367. [2021-07-13 19:56:31,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 2.5491803278688523) internal successors, (933), 366 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:31,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 933 transitions. [2021-07-13 19:56:31,136 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 933 transitions. Word has length 20 [2021-07-13 19:56:31,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:31,136 INFO L482 AbstractCegarLoop]: Abstraction has 367 states and 933 transitions. [2021-07-13 19:56:31,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:31,136 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 933 transitions. [2021-07-13 19:56:31,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:56:31,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:31,137 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:31,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19461,760 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:31,337 INFO L430 AbstractCegarLoop]: === Iteration 778 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:31,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:31,337 INFO L82 PathProgramCache]: Analyzing trace with hash -2099263047, now seen corresponding path program 757 times [2021-07-13 19:56:31,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:31,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51395211] [2021-07-13 19:56:31,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:31,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:31,480 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:56:31,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:31,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51395211] [2021-07-13 19:56:31,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51395211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:31,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507125345] [2021-07-13 19:56:31,480 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 761 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 761 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:31,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:31,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:56:31,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:31,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507125345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:31,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:31,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 19 [2021-07-13 19:56:31,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956323914] [2021-07-13 19:56:31,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:56:31,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:31,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:56:31,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:56:31,930 INFO L87 Difference]: Start difference. First operand 367 states and 933 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:32,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:32,537 INFO L93 Difference]: Finished difference Result 584 states and 1332 transitions. [2021-07-13 19:56:32,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:56:32,537 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:56:32,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:32,538 INFO L225 Difference]: With dead ends: 584 [2021-07-13 19:56:32,538 INFO L226 Difference]: Without dead ends: 577 [2021-07-13 19:56:32,538 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 590.8ms TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:56:32,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-07-13 19:56:32,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 368. [2021-07-13 19:56:32,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.553133514986376) internal successors, (937), 367 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:32,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 937 transitions. [2021-07-13 19:56:32,542 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 937 transitions. Word has length 20 [2021-07-13 19:56:32,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:32,542 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 937 transitions. [2021-07-13 19:56:32,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:32,542 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 937 transitions. [2021-07-13 19:56:32,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:56:32,543 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:32,543 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:32,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19508,761 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:32,743 INFO L430 AbstractCegarLoop]: === Iteration 779 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:32,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:32,744 INFO L82 PathProgramCache]: Analyzing trace with hash -407678411, now seen corresponding path program 758 times [2021-07-13 19:56:32,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:32,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116520359] [2021-07-13 19:56:32,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:32,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:32,999 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:56:32,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:33,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116520359] [2021-07-13 19:56:33,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116520359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:33,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187272242] [2021-07-13 19:56:33,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 762 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 762 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:33,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:56:33,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:33,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:56:33,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:33,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-07-13 19:56:33,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-07-13 19:56:33,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-07-13 19:56:33,552 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-07-13 19:56:33,558 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-07-13 19:56:33,565 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-07-13 19:56:33,571 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-07-13 19:56:33,577 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-07-13 19:56:33,584 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-07-13 19:56:33,591 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:56:33,597 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:56:33,603 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:56:33,610 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:56:33,616 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-07-13 19:56:33,623 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:56:33,629 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-07-13 19:56:33,635 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-07-13 19:56:33,642 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-07-13 19:56:33,648 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-07-13 19:56:33,655 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-07-13 19:56:33,660 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-07-13 19:56:33,666 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,671 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:56:33,671 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-07-13 19:56:33,677 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,681 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:56:33,682 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-07-13 19:56:33,688 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:56:33,694 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-07-13 19:56:33,699 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-07-13 19:56:33,705 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,709 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:56:33,710 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-07-13 19:56:33,715 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-07-13 19:56:33,721 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:56:33,726 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,730 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:56:33,731 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:56:33,736 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,740 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:56:33,741 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,744 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:56:33,744 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,844 INFO L628 ElimStorePlain]: treesize reduction 559, result has 12.4 percent of original size [2021-07-13 19:56:33,844 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:56:33,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:56:33,845 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 3 variables, input treesize:2161, output treesize:55 [2021-07-13 19:56:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:33,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187272242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:33,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:33,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-07-13 19:56:33,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343102985] [2021-07-13 19:56:33,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:56:33,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:33,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:56:33,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:56:33,977 INFO L87 Difference]: Start difference. First operand 368 states and 937 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:35,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:35,042 INFO L93 Difference]: Finished difference Result 613 states and 1377 transitions. [2021-07-13 19:56:35,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:56:35,042 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:56:35,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:35,043 INFO L225 Difference]: With dead ends: 613 [2021-07-13 19:56:35,043 INFO L226 Difference]: Without dead ends: 599 [2021-07-13 19:56:35,043 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1117.1ms TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:56:35,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-07-13 19:56:35,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 367. [2021-07-13 19:56:35,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 2.5491803278688523) internal successors, (933), 366 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:35,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 933 transitions. [2021-07-13 19:56:35,047 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 933 transitions. Word has length 20 [2021-07-13 19:56:35,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:35,048 INFO L482 AbstractCegarLoop]: Abstraction has 367 states and 933 transitions. [2021-07-13 19:56:35,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:35,048 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 933 transitions. [2021-07-13 19:56:35,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:56:35,048 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:35,048 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:35,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19607,762 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:35,249 INFO L430 AbstractCegarLoop]: === Iteration 780 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:35,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:35,249 INFO L82 PathProgramCache]: Analyzing trace with hash -234430719, now seen corresponding path program 759 times [2021-07-13 19:56:35,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:35,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306634484] [2021-07-13 19:56:35,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:35,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:35,410 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:56:35,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:35,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306634484] [2021-07-13 19:56:35,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306634484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:35,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195005628] [2021-07-13 19:56:35,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 763 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 763 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:35,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:56:35,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:35,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:56:35,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:35,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:35,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:35,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:56:35,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:35,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:35,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:35,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-07-13 19:56:35,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:35,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:35,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:35,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-07-13 19:56:35,872 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:35,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:35,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:35,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-13 19:56:35,877 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:35,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:35,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:35,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-07-13 19:56:35,882 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:35,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:35,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:35,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-07-13 19:56:35,887 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:35,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:35,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:35,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-07-13 19:56:35,893 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:35,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:35,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:35,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-13 19:56:35,898 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:35,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:35,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:35,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-07-13 19:56:35,903 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:35,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:35,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:35,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-13 19:56:35,908 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:35,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:35,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:35,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:56:35,914 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:35,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:35,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:35,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-13 19:56:35,924 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:35,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:35,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:35,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-07-13 19:56:35,945 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:35,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:35,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:35,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:56:35,951 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:35,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:35,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:35,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:56:35,958 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:35,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:35,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:35,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 19:56:35,963 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:35,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:35,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:35,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-07-13 19:56:35,968 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:35,971 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:56:35,971 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:36,063 INFO L628 ElimStorePlain]: treesize reduction 353, result has 18.5 percent of original size [2021-07-13 19:56:36,063 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-07-13 19:56:36,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:56:36,065 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 3 variables, input treesize:997, output treesize:86 [2021-07-13 19:56:36,177 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:36,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195005628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:36,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:36,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-07-13 19:56:36,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278843] [2021-07-13 19:56:36,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:56:36,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:36,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:56:36,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:56:36,177 INFO L87 Difference]: Start difference. First operand 367 states and 933 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:36,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:36,968 INFO L93 Difference]: Finished difference Result 576 states and 1315 transitions. [2021-07-13 19:56:36,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:56:36,969 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:56:36,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:36,970 INFO L225 Difference]: With dead ends: 576 [2021-07-13 19:56:36,970 INFO L226 Difference]: Without dead ends: 562 [2021-07-13 19:56:36,970 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 846.5ms TimeCoverageRelationStatistics Valid=138, Invalid=1122, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:56:36,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-07-13 19:56:36,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 367. [2021-07-13 19:56:36,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 2.5491803278688523) internal successors, (933), 366 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:36,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 933 transitions. [2021-07-13 19:56:36,974 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 933 transitions. Word has length 20 [2021-07-13 19:56:36,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:36,974 INFO L482 AbstractCegarLoop]: Abstraction has 367 states and 933 transitions. [2021-07-13 19:56:36,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:36,974 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 933 transitions. [2021-07-13 19:56:36,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:56:36,975 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:36,975 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:37,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 763 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19754 [2021-07-13 19:56:37,176 INFO L430 AbstractCegarLoop]: === Iteration 781 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:37,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:37,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1511517725, now seen corresponding path program 760 times [2021-07-13 19:56:37,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:37,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464531245] [2021-07-13 19:56:37,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:37,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:37,344 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:37,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:37,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464531245] [2021-07-13 19:56:37,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464531245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:37,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203493254] [2021-07-13 19:56:37,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 764 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 764 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:37,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:56:37,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:37,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:56:37,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:37,923 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:37,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203493254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:37,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:37,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-13 19:56:37,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284333189] [2021-07-13 19:56:37,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:56:37,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:37,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:56:37,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:56:37,924 INFO L87 Difference]: Start difference. First operand 367 states and 933 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:39,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:39,041 INFO L93 Difference]: Finished difference Result 645 states and 1451 transitions. [2021-07-13 19:56:39,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:56:39,041 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:56:39,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:39,042 INFO L225 Difference]: With dead ends: 645 [2021-07-13 19:56:39,042 INFO L226 Difference]: Without dead ends: 638 [2021-07-13 19:56:39,042 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 1007.3ms TimeCoverageRelationStatistics Valid=164, Invalid=1558, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:56:39,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-07-13 19:56:39,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 374. [2021-07-13 19:56:39,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 2.5683646112600536) internal successors, (958), 373 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:39,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 958 transitions. [2021-07-13 19:56:39,046 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 958 transitions. Word has length 20 [2021-07-13 19:56:39,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:39,047 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 958 transitions. [2021-07-13 19:56:39,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:39,047 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 958 transitions. [2021-07-13 19:56:39,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:56:39,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:39,047 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:39,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 764 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19848 [2021-07-13 19:56:39,248 INFO L430 AbstractCegarLoop]: === Iteration 782 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:39,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:39,248 INFO L82 PathProgramCache]: Analyzing trace with hash 180066911, now seen corresponding path program 761 times [2021-07-13 19:56:39,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:39,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842310284] [2021-07-13 19:56:39,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:39,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:39,522 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:39,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:39,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842310284] [2021-07-13 19:56:39,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842310284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:39,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573555785] [2021-07-13 19:56:39,522 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 765 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 765 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:39,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:56:39,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:39,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:56:39,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:40,080 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:40,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573555785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:40,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:40,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-13 19:56:40,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709489243] [2021-07-13 19:56:40,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:56:40,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:40,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:56:40,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:56:40,081 INFO L87 Difference]: Start difference. First operand 374 states and 958 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:41,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:41,294 INFO L93 Difference]: Finished difference Result 649 states and 1456 transitions. [2021-07-13 19:56:41,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:56:41,295 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:56:41,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:41,296 INFO L225 Difference]: With dead ends: 649 [2021-07-13 19:56:41,296 INFO L226 Difference]: Without dead ends: 642 [2021-07-13 19:56:41,296 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1186.9ms TimeCoverageRelationStatistics Valid=168, Invalid=1638, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:56:41,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-07-13 19:56:41,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 373. [2021-07-13 19:56:41,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 2.564516129032258) internal successors, (954), 372 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:41,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 954 transitions. [2021-07-13 19:56:41,300 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 954 transitions. Word has length 20 [2021-07-13 19:56:41,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:41,300 INFO L482 AbstractCegarLoop]: Abstraction has 373 states and 954 transitions. [2021-07-13 19:56:41,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:41,300 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 954 transitions. [2021-07-13 19:56:41,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:56:41,301 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:41,301 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:41,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 765 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19996 [2021-07-13 19:56:41,501 INFO L430 AbstractCegarLoop]: === Iteration 783 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:41,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:41,502 INFO L82 PathProgramCache]: Analyzing trace with hash 353314603, now seen corresponding path program 762 times [2021-07-13 19:56:41,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:41,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539676517] [2021-07-13 19:56:41,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:41,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:41,769 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:41,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:41,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539676517] [2021-07-13 19:56:41,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539676517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:41,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007161997] [2021-07-13 19:56:41,769 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 766 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 766 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:41,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:56:41,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:41,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:56:41,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:42,315 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:42,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007161997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:42,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:42,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-13 19:56:42,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004733364] [2021-07-13 19:56:42,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:56:42,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:42,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:56:42,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:56:42,316 INFO L87 Difference]: Start difference. First operand 373 states and 954 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:42,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:42,843 INFO L93 Difference]: Finished difference Result 480 states and 1164 transitions. [2021-07-13 19:56:42,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:56:42,843 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:56:42,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:42,844 INFO L225 Difference]: With dead ends: 480 [2021-07-13 19:56:42,844 INFO L226 Difference]: Without dead ends: 473 [2021-07-13 19:56:42,844 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 783.2ms TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:56:42,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-07-13 19:56:42,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 374. [2021-07-13 19:56:42,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 2.5656836461126007) internal successors, (957), 373 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:42,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 957 transitions. [2021-07-13 19:56:42,848 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 957 transitions. Word has length 20 [2021-07-13 19:56:42,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:42,848 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 957 transitions. [2021-07-13 19:56:42,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:42,848 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 957 transitions. [2021-07-13 19:56:42,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:56:42,848 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:42,848 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:43,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 766 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20128 [2021-07-13 19:56:43,049 INFO L430 AbstractCegarLoop]: === Iteration 784 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:43,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:43,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1429025759, now seen corresponding path program 763 times [2021-07-13 19:56:43,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:43,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545155391] [2021-07-13 19:56:43,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:43,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:43,210 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:43,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:43,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545155391] [2021-07-13 19:56:43,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545155391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:43,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402833228] [2021-07-13 19:56:43,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 767 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 767 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:43,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:43,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:56:43,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:43,663 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:43,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402833228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:43,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:43,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-07-13 19:56:43,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319234954] [2021-07-13 19:56:43,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:56:43,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:43,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:56:43,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:56:43,664 INFO L87 Difference]: Start difference. First operand 374 states and 957 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:44,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:44,257 INFO L93 Difference]: Finished difference Result 609 states and 1381 transitions. [2021-07-13 19:56:44,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:56:44,257 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:56:44,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:44,258 INFO L225 Difference]: With dead ends: 609 [2021-07-13 19:56:44,258 INFO L226 Difference]: Without dead ends: 602 [2021-07-13 19:56:44,258 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 620.3ms TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:56:44,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-07-13 19:56:44,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 380. [2021-07-13 19:56:44,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.559366754617414) internal successors, (970), 379 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:44,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 970 transitions. [2021-07-13 19:56:44,262 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 970 transitions. Word has length 20 [2021-07-13 19:56:44,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:44,263 INFO L482 AbstractCegarLoop]: Abstraction has 380 states and 970 transitions. [2021-07-13 19:56:44,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:44,263 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 970 transitions. [2021-07-13 19:56:44,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:56:44,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:44,263 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:44,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20251,767 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:44,464 INFO L430 AbstractCegarLoop]: === Iteration 785 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:44,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:44,464 INFO L82 PathProgramCache]: Analyzing trace with hash -301986543, now seen corresponding path program 764 times [2021-07-13 19:56:44,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:44,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131442144] [2021-07-13 19:56:44,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:44,714 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:44,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:44,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131442144] [2021-07-13 19:56:44,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131442144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:44,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004936057] [2021-07-13 19:56:44,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 768 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 768 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:44,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:56:44,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:44,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:56:44,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-07-13 19:56:45,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20370,SelfDestructingSolverStorable20342,768 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:45,373 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 19:56:45,375 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 19:56:45,376 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 19:56:45,376 INFO L202 PluginConnector]: Adding new model word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 07:56:45 BasicIcfg [2021-07-13 19:56:45,376 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 19:56:45,377 INFO L168 Benchmark]: Toolchain (without parser) took 834131.42 ms. Allocated memory was 191.9 MB in the beginning and 332.4 MB in the end (delta: 140.5 MB). Free memory was 172.5 MB in the beginning and 142.2 MB in the end (delta: 30.3 MB). Peak memory consumption was 171.8 MB. Max. memory is 8.0 GB. [2021-07-13 19:56:45,377 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 191.9 MB. Free memory is still 173.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 19:56:45,377 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.08 ms. Allocated memory is still 191.9 MB. Free memory was 172.4 MB in the beginning and 171.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-13 19:56:45,377 INFO L168 Benchmark]: Boogie Preprocessor took 15.87 ms. Allocated memory is still 191.9 MB. Free memory was 171.0 MB in the beginning and 169.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 19:56:45,377 INFO L168 Benchmark]: RCFGBuilder took 291.85 ms. Allocated memory is still 191.9 MB. Free memory was 169.9 MB in the beginning and 150.9 MB in the end (delta: 19.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2021-07-13 19:56:45,377 INFO L168 Benchmark]: TraceAbstraction took 833789.63 ms. Allocated memory was 191.9 MB in the beginning and 332.4 MB in the end (delta: 140.5 MB). Free memory was 150.4 MB in the beginning and 142.2 MB in the end (delta: 8.2 MB). Peak memory consumption was 149.8 MB. Max. memory is 8.0 GB. [2021-07-13 19:56:45,378 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 191.9 MB. Free memory is still 173.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 26.08 ms. Allocated memory is still 191.9 MB. Free memory was 172.4 MB in the beginning and 171.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 15.87 ms. Allocated memory is still 191.9 MB. Free memory was 171.0 MB in the beginning and 169.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 291.85 ms. Allocated memory is still 191.9 MB. Free memory was 169.9 MB in the beginning and 150.9 MB in the end (delta: 19.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 833789.63 ms. Allocated memory was 191.9 MB in the beginning and 332.4 MB in the end (delta: 140.5 MB). Free memory was 150.4 MB in the beginning and 142.2 MB in the end (delta: 8.2 MB). Peak memory consumption was 149.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 21 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 27 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 833721.1ms, OverallIterations: 785, TraceHistogramMax: 4, EmptinessCheckTime: 258.0ms, AutomataDifference: 349094.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 28584 SDtfs, 44430 SDslu, 222860 SDs, 0 SdLazy, 279962 SolverSat, 10140 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 112775.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27835 GetRequests, 8679 SyntacticMatches, 1991 SemanticMatches, 17165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94992 ImplicationChecksByTransitivity, 385706.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=380occurred in iteration=784, InterpolantAutomatonStates: 14228, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1987.2ms AutomataMinimizationTime, 784 MinimizatonAttempts, 69059 StatesRemovedByMinimization, 778 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2707.2ms SsaConstructionTime, 10266.3ms SatisfiabilityAnalysisTime, 299289.2ms InterpolantComputationTime, 27608 NumberOfCodeBlocks, 27608 NumberOfCodeBlocksAsserted, 2618 NumberOfCheckSat, 26058 ConstructedInterpolants, 1190 QuantifiedInterpolants, 361454 SizeOfPredicates, 5206 NumberOfNonLiveVariables, 62060 ConjunctsInSsa, 16226 ConjunctsInUnsatCore, 1550 InterpolantComputations, 18 PerfectInterpolantSequences, 2590/18811 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown