/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sorted.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 07:03:34,480 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 07:03:34,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 07:03:34,526 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 07:03:34,527 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 07:03:34,530 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 07:03:34,532 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 07:03:34,537 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 07:03:34,539 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 07:03:34,543 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 07:03:34,544 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 07:03:34,546 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 07:03:34,546 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 07:03:34,548 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 07:03:34,549 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 07:03:34,550 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 07:03:34,552 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 07:03:34,553 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 07:03:34,555 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 07:03:34,560 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 07:03:34,562 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 07:03:34,563 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 07:03:34,564 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 07:03:34,565 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 07:03:34,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-05 07:03:34,572 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-05 07:03:34,572 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-05 07:03:34,574 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-05 07:03:34,574 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-05 07:03:34,575 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-05 07:03:34,575 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-05 07:03:34,576 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-05 07:03:34,577 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-05 07:03:34,578 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-05 07:03:34,579 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-05 07:03:34,579 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-05 07:03:34,580 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-05 07:03:34,580 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-05 07:03:34,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 07:03:34,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 07:03:34,581 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 07:03:34,585 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 07:03:34,630 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 07:03:34,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 07:03:34,631 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 07:03:34,631 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 07:03:34,633 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 07:03:34,633 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 07:03:34,634 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 07:03:34,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 07:03:34,634 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 07:03:34,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 07:03:34,635 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 07:03:34,635 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 07:03:34,635 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 07:03:34,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 07:03:34,636 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 07:03:34,636 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 07:03:34,636 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 07:03:34,636 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 07:03:34,636 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 07:03:34,636 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 07:03:34,637 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 07:03:34,637 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 07:03:34,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 07:03:34,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 07:03:34,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 07:03:34,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 07:03:34,637 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 07:03:34,638 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 07:03:34,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 07:03:34,638 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 07:03:34,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 07:03:34,638 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 07:03:34,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 07:03:35,006 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 07:03:35,010 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 07:03:35,011 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 07:03:35,012 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 07:03:35,012 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sorted.wvr.bpl [2021-06-05 07:03:35,013 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sorted.wvr.bpl' [2021-06-05 07:03:35,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 07:03:35,060 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 07:03:35,061 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 07:03:35,062 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 07:03:35,062 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 07:03:35,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:03:35" (1/1) ... [2021-06-05 07:03:35,083 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:03:35" (1/1) ... [2021-06-05 07:03:35,090 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 07:03:35,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 07:03:35,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 07:03:35,093 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 07:03:35,100 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:03:35" (1/1) ... [2021-06-05 07:03:35,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:03:35" (1/1) ... [2021-06-05 07:03:35,102 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:03:35" (1/1) ... [2021-06-05 07:03:35,102 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:03:35" (1/1) ... [2021-06-05 07:03:35,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:03:35" (1/1) ... [2021-06-05 07:03:35,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:03:35" (1/1) ... [2021-06-05 07:03:35,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:03:35" (1/1) ... [2021-06-05 07:03:35,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 07:03:35,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 07:03:35,117 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 07:03:35,118 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 07:03:35,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:03:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 07:03:35,191 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 07:03:35,192 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 07:03:35,192 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 07:03:35,192 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 07:03:35,192 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 07:03:35,192 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 07:03:35,196 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 07:03:35,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 07:03:35,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 07:03:35,197 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 07:03:35,197 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 07:03:35,197 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 07:03:35,198 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 07:03:35,376 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 07:03:35,376 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 07:03:35,378 INFO L202 PluginConnector]: Adding new model sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 07:03:35 BoogieIcfgContainer [2021-06-05 07:03:35,378 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 07:03:35,379 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 07:03:35,379 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 07:03:35,386 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 07:03:35,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:03:35" (1/2) ... [2021-06-05 07:03:35,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2646805a and model type sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 07:03:35, skipping insertion in model container [2021-06-05 07:03:35,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 07:03:35" (2/2) ... [2021-06-05 07:03:35,389 INFO L111 eAbstractionObserver]: Analyzing ICFG sorted.wvr.bpl [2021-06-05 07:03:35,394 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 07:03:35,394 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 07:03:35,394 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 07:03:35,395 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 07:03:35,445 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 07:03:35,483 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 07:03:35,517 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 07:03:35,517 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 07:03:35,517 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 07:03:35,518 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 07:03:35,518 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 07:03:35,518 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 07:03:35,518 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 07:03:35,518 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 07:03:35,525 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 32 transitions, 88 flow [2021-06-05 07:03:35,576 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 117 states, 115 states have (on average 2.756521739130435) internal successors, (317), 116 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:35,578 INFO L276 IsEmpty]: Start isEmpty. Operand has 117 states, 115 states have (on average 2.756521739130435) internal successors, (317), 116 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:35,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 07:03:35,586 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:35,586 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:35,587 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:35,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:35,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1415304500, now seen corresponding path program 1 times [2021-06-05 07:03:35,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:35,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104392465] [2021-06-05 07:03:35,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:35,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:35,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:35,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:35,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104392465] [2021-06-05 07:03:35,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104392465] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:03:35,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:03:35,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 07:03:35,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733773908] [2021-06-05 07:03:35,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 07:03:35,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:35,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 07:03:35,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 07:03:35,847 INFO L87 Difference]: Start difference. First operand has 117 states, 115 states have (on average 2.756521739130435) internal successors, (317), 116 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:35,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:35,920 INFO L93 Difference]: Finished difference Result 410 states and 1170 transitions. [2021-06-05 07:03:35,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 07:03:35,922 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 07:03:35,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:35,941 INFO L225 Difference]: With dead ends: 410 [2021-06-05 07:03:35,941 INFO L226 Difference]: Without dead ends: 395 [2021-06-05 07:03:35,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 07:03:35,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-06-05 07:03:36,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 152. [2021-06-05 07:03:36,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.794701986754967) internal successors, (422), 151 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:36,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 422 transitions. [2021-06-05 07:03:36,014 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 422 transitions. Word has length 21 [2021-06-05 07:03:36,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:36,015 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 422 transitions. [2021-06-05 07:03:36,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:36,015 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 422 transitions. [2021-06-05 07:03:36,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:03:36,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:36,017 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:36,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 07:03:36,017 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:36,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:36,018 INFO L82 PathProgramCache]: Analyzing trace with hash 435293552, now seen corresponding path program 1 times [2021-06-05 07:03:36,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:36,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269607657] [2021-06-05 07:03:36,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:36,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:36,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:36,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269607657] [2021-06-05 07:03:36,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269607657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:36,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344884151] [2021-06-05 07:03:36,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:36,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:36,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 07:03:36,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:36,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:36,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344884151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:36,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:36,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 07:03:36,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303621151] [2021-06-05 07:03:36,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:03:36,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:36,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:03:36,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:03:36,363 INFO L87 Difference]: Start difference. First operand 152 states and 422 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:36,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:36,651 INFO L93 Difference]: Finished difference Result 532 states and 1491 transitions. [2021-06-05 07:03:36,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 07:03:36,652 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 07:03:36,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:36,655 INFO L225 Difference]: With dead ends: 532 [2021-06-05 07:03:36,656 INFO L226 Difference]: Without dead ends: 532 [2021-06-05 07:03:36,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 155.2ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:03:36,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-06-05 07:03:36,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 165. [2021-06-05 07:03:36,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.8963414634146343) internal successors, (475), 164 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:36,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 475 transitions. [2021-06-05 07:03:36,685 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 475 transitions. Word has length 23 [2021-06-05 07:03:36,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:36,686 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 475 transitions. [2021-06-05 07:03:36,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:36,687 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 475 transitions. [2021-06-05 07:03:36,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:03:36,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:36,693 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:36,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 07:03:36,918 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:36,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:36,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1894116080, now seen corresponding path program 2 times [2021-06-05 07:03:36,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:36,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346193107] [2021-06-05 07:03:36,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:36,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:37,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:37,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:37,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346193107] [2021-06-05 07:03:37,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346193107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:37,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415076472] [2021-06-05 07:03:37,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:37,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:03:37,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:37,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 07:03:37,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:37,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:37,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415076472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:37,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:37,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 07:03:37,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033747155] [2021-06-05 07:03:37,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:03:37,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:37,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:03:37,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:03:37,194 INFO L87 Difference]: Start difference. First operand 165 states and 475 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:37,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:37,462 INFO L93 Difference]: Finished difference Result 565 states and 1578 transitions. [2021-06-05 07:03:37,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 07:03:37,463 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 07:03:37,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:37,473 INFO L225 Difference]: With dead ends: 565 [2021-06-05 07:03:37,473 INFO L226 Difference]: Without dead ends: 565 [2021-06-05 07:03:37,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 176.9ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:03:37,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-05 07:03:37,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 166. [2021-06-05 07:03:37,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.878787878787879) internal successors, (475), 165 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:37,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 475 transitions. [2021-06-05 07:03:37,492 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 475 transitions. Word has length 23 [2021-06-05 07:03:37,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:37,492 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 475 transitions. [2021-06-05 07:03:37,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:37,492 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 475 transitions. [2021-06-05 07:03:37,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:03:37,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:37,493 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:37,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:37,698 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:37,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:37,699 INFO L82 PathProgramCache]: Analyzing trace with hash 730755178, now seen corresponding path program 1 times [2021-06-05 07:03:37,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:37,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690673893] [2021-06-05 07:03:37,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:37,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:37,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:37,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:37,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690673893] [2021-06-05 07:03:37,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690673893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:37,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558767570] [2021-06-05 07:03:37,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:37,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:37,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 07:03:37,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:37,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:37,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558767570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:37,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:37,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 07:03:37,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966919858] [2021-06-05 07:03:37,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:03:37,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:37,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:03:37,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:03:37,888 INFO L87 Difference]: Start difference. First operand 166 states and 475 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:37,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:37,962 INFO L93 Difference]: Finished difference Result 356 states and 997 transitions. [2021-06-05 07:03:37,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 07:03:37,963 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 07:03:37,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:37,965 INFO L225 Difference]: With dead ends: 356 [2021-06-05 07:03:37,965 INFO L226 Difference]: Without dead ends: 356 [2021-06-05 07:03:37,965 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:03:37,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-06-05 07:03:37,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 186. [2021-06-05 07:03:37,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.9783783783783786) internal successors, (551), 185 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:37,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 551 transitions. [2021-06-05 07:03:37,973 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 551 transitions. Word has length 23 [2021-06-05 07:03:37,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:37,973 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 551 transitions. [2021-06-05 07:03:37,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:37,974 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 551 transitions. [2021-06-05 07:03:37,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:03:37,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:37,974 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:38,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:38,189 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:38,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:38,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1327749482, now seen corresponding path program 3 times [2021-06-05 07:03:38,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:38,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567435295] [2021-06-05 07:03:38,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:38,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:38,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:38,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567435295] [2021-06-05 07:03:38,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567435295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:38,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238981750] [2021-06-05 07:03:38,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:38,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:03:38,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:38,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 07:03:38,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:38,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:38,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238981750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:38,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:38,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 07:03:38,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168138131] [2021-06-05 07:03:38,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:03:38,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:38,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:03:38,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:03:38,386 INFO L87 Difference]: Start difference. First operand 186 states and 551 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:38,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:38,588 INFO L93 Difference]: Finished difference Result 597 states and 1646 transitions. [2021-06-05 07:03:38,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:03:38,590 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 07:03:38,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:38,593 INFO L225 Difference]: With dead ends: 597 [2021-06-05 07:03:38,593 INFO L226 Difference]: Without dead ends: 597 [2021-06-05 07:03:38,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 117.1ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:03:38,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-06-05 07:03:38,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 186. [2021-06-05 07:03:38,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.9783783783783786) internal successors, (551), 185 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:38,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 551 transitions. [2021-06-05 07:03:38,603 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 551 transitions. Word has length 23 [2021-06-05 07:03:38,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:38,603 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 551 transitions. [2021-06-05 07:03:38,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:38,604 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 551 transitions. [2021-06-05 07:03:38,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:03:38,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:38,604 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:38,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:38,828 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:38,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:38,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1644969426, now seen corresponding path program 1 times [2021-06-05 07:03:38,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:38,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905434370] [2021-06-05 07:03:38,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:38,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:38,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:38,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:38,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905434370] [2021-06-05 07:03:38,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905434370] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:03:38,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:03:38,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 07:03:38,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661939839] [2021-06-05 07:03:38,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 07:03:38,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:38,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 07:03:38,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 07:03:38,872 INFO L87 Difference]: Start difference. First operand 186 states and 551 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:38,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:38,935 INFO L93 Difference]: Finished difference Result 329 states and 915 transitions. [2021-06-05 07:03:38,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 07:03:38,935 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 07:03:38,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:38,937 INFO L225 Difference]: With dead ends: 329 [2021-06-05 07:03:38,937 INFO L226 Difference]: Without dead ends: 323 [2021-06-05 07:03:38,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:03:38,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-05 07:03:38,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 225. [2021-06-05 07:03:38,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.924107142857143) internal successors, (655), 224 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:38,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 655 transitions. [2021-06-05 07:03:38,947 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 655 transitions. Word has length 23 [2021-06-05 07:03:38,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:38,947 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 655 transitions. [2021-06-05 07:03:38,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:38,948 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 655 transitions. [2021-06-05 07:03:38,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:03:38,948 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:38,948 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:38,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 07:03:38,949 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:38,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:38,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1918692182, now seen corresponding path program 2 times [2021-06-05 07:03:38,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:38,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826282369] [2021-06-05 07:03:38,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:38,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:39,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:39,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:39,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826282369] [2021-06-05 07:03:39,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826282369] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:03:39,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:03:39,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 07:03:39,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419132709] [2021-06-05 07:03:39,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 07:03:39,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:39,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 07:03:39,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 07:03:39,007 INFO L87 Difference]: Start difference. First operand 225 states and 655 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:39,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:39,045 INFO L93 Difference]: Finished difference Result 295 states and 825 transitions. [2021-06-05 07:03:39,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 07:03:39,046 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 07:03:39,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:39,047 INFO L225 Difference]: With dead ends: 295 [2021-06-05 07:03:39,047 INFO L226 Difference]: Without dead ends: 295 [2021-06-05 07:03:39,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.4ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:03:39,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-06-05 07:03:39,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 209. [2021-06-05 07:03:39,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.9278846153846154) internal successors, (609), 208 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:39,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 609 transitions. [2021-06-05 07:03:39,054 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 609 transitions. Word has length 23 [2021-06-05 07:03:39,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:39,054 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 609 transitions. [2021-06-05 07:03:39,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:39,054 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 609 transitions. [2021-06-05 07:03:39,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:03:39,055 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:39,055 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:39,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 07:03:39,055 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:39,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:39,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1943824618, now seen corresponding path program 3 times [2021-06-05 07:03:39,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:39,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292224932] [2021-06-05 07:03:39,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:39,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:39,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:39,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:39,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292224932] [2021-06-05 07:03:39,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292224932] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:03:39,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:03:39,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 07:03:39,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153659765] [2021-06-05 07:03:39,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:03:39,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:39,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:03:39,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:03:39,093 INFO L87 Difference]: Start difference. First operand 209 states and 609 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:39,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:39,152 INFO L93 Difference]: Finished difference Result 303 states and 837 transitions. [2021-06-05 07:03:39,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 07:03:39,153 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 07:03:39,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:39,155 INFO L225 Difference]: With dead ends: 303 [2021-06-05 07:03:39,155 INFO L226 Difference]: Without dead ends: 303 [2021-06-05 07:03:39,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:03:39,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-06-05 07:03:39,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 201. [2021-06-05 07:03:39,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.865) internal successors, (573), 200 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:39,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 573 transitions. [2021-06-05 07:03:39,161 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 573 transitions. Word has length 23 [2021-06-05 07:03:39,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:39,161 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 573 transitions. [2021-06-05 07:03:39,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:39,162 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 573 transitions. [2021-06-05 07:03:39,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:03:39,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:39,162 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:39,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 07:03:39,163 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:39,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:39,163 INFO L82 PathProgramCache]: Analyzing trace with hash 2060210918, now seen corresponding path program 4 times [2021-06-05 07:03:39,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:39,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444833152] [2021-06-05 07:03:39,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:39,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:39,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:39,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:39,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444833152] [2021-06-05 07:03:39,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444833152] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:03:39,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:03:39,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 07:03:39,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556749655] [2021-06-05 07:03:39,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:03:39,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:39,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:03:39,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:03:39,202 INFO L87 Difference]: Start difference. First operand 201 states and 573 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:39,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:39,291 INFO L93 Difference]: Finished difference Result 326 states and 884 transitions. [2021-06-05 07:03:39,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 07:03:39,292 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 07:03:39,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:39,293 INFO L225 Difference]: With dead ends: 326 [2021-06-05 07:03:39,293 INFO L226 Difference]: Without dead ends: 322 [2021-06-05 07:03:39,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 46.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:03:39,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-06-05 07:03:39,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 201. [2021-06-05 07:03:39,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.855) internal successors, (571), 200 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:39,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 571 transitions. [2021-06-05 07:03:39,300 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 571 transitions. Word has length 23 [2021-06-05 07:03:39,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:39,300 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 571 transitions. [2021-06-05 07:03:39,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:39,301 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 571 transitions. [2021-06-05 07:03:39,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:03:39,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:39,301 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:39,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 07:03:39,301 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:39,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:39,302 INFO L82 PathProgramCache]: Analyzing trace with hash 227810994, now seen corresponding path program 2 times [2021-06-05 07:03:39,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:39,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821916923] [2021-06-05 07:03:39,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:39,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:39,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:39,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:39,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821916923] [2021-06-05 07:03:39,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821916923] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:03:39,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:03:39,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 07:03:39,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142256087] [2021-06-05 07:03:39,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:03:39,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:39,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:03:39,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:03:39,336 INFO L87 Difference]: Start difference. First operand 201 states and 571 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:39,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:39,395 INFO L93 Difference]: Finished difference Result 229 states and 638 transitions. [2021-06-05 07:03:39,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 07:03:39,396 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 07:03:39,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:39,397 INFO L225 Difference]: With dead ends: 229 [2021-06-05 07:03:39,397 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 07:03:39,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:03:39,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 07:03:39,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 178. [2021-06-05 07:03:39,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.847457627118644) internal successors, (504), 177 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:39,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 504 transitions. [2021-06-05 07:03:39,403 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 504 transitions. Word has length 23 [2021-06-05 07:03:39,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:39,404 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 504 transitions. [2021-06-05 07:03:39,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:39,404 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 504 transitions. [2021-06-05 07:03:39,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:03:39,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:39,405 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:39,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 07:03:39,405 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:39,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:39,405 INFO L82 PathProgramCache]: Analyzing trace with hash -961400090, now seen corresponding path program 5 times [2021-06-05 07:03:39,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:39,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577033079] [2021-06-05 07:03:39,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:39,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:39,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:39,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:39,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577033079] [2021-06-05 07:03:39,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577033079] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:03:39,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:03:39,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 07:03:39,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627607769] [2021-06-05 07:03:39,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:03:39,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:39,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:03:39,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:03:39,439 INFO L87 Difference]: Start difference. First operand 178 states and 504 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:39,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:39,548 INFO L93 Difference]: Finished difference Result 331 states and 903 transitions. [2021-06-05 07:03:39,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 07:03:39,548 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 07:03:39,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:39,550 INFO L225 Difference]: With dead ends: 331 [2021-06-05 07:03:39,550 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 07:03:39,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 48.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:03:39,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 07:03:39,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 198. [2021-06-05 07:03:39,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.83248730964467) internal successors, (558), 197 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:39,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 558 transitions. [2021-06-05 07:03:39,560 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 558 transitions. Word has length 23 [2021-06-05 07:03:39,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:39,560 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 558 transitions. [2021-06-05 07:03:39,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:39,560 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 558 transitions. [2021-06-05 07:03:39,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:03:39,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:39,562 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:39,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 07:03:39,562 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:39,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:39,563 INFO L82 PathProgramCache]: Analyzing trace with hash 17157354, now seen corresponding path program 6 times [2021-06-05 07:03:39,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:39,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954226068] [2021-06-05 07:03:39,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:39,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:39,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:39,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:39,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954226068] [2021-06-05 07:03:39,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954226068] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:03:39,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:03:39,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 07:03:39,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308207473] [2021-06-05 07:03:39,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:03:39,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:39,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:03:39,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:03:39,597 INFO L87 Difference]: Start difference. First operand 198 states and 558 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:39,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:39,729 INFO L93 Difference]: Finished difference Result 313 states and 871 transitions. [2021-06-05 07:03:39,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 07:03:39,730 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 07:03:39,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:39,731 INFO L225 Difference]: With dead ends: 313 [2021-06-05 07:03:39,731 INFO L226 Difference]: Without dead ends: 313 [2021-06-05 07:03:39,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:03:39,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-06-05 07:03:39,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 182. [2021-06-05 07:03:39,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.839779005524862) internal successors, (514), 181 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:39,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 514 transitions. [2021-06-05 07:03:39,738 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 514 transitions. Word has length 23 [2021-06-05 07:03:39,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:39,739 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 514 transitions. [2021-06-05 07:03:39,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:39,739 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 514 transitions. [2021-06-05 07:03:39,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:03:39,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:39,740 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:39,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 07:03:39,740 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:39,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:39,740 INFO L82 PathProgramCache]: Analyzing trace with hash 751961810, now seen corresponding path program 1 times [2021-06-05 07:03:39,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:39,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618593872] [2021-06-05 07:03:39,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:40,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:40,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:40,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618593872] [2021-06-05 07:03:40,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618593872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:40,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191613194] [2021-06-05 07:03:40,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:40,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:40,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 07:03:40,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:40,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:40,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:40,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:40,629 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-06-05 07:03:40,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 25 [2021-06-05 07:03:40,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:40,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:40,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:40,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:40,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:40,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 07:03:40,687 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:40,789 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-06-05 07:03:40,790 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.0 percent of original size [2021-06-05 07:03:40,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:40,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:40,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:40,818 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-05 07:03:40,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 21 [2021-06-05 07:03:40,822 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:40,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:40,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:40,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:40,855 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:40,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 07:03:40,880 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:40,959 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.9 percent of original size [2021-06-05 07:03:40,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 07:03:40,971 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:129, output treesize:70 [2021-06-05 07:03:41,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:41,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191613194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:41,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:41,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 07:03:41,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703474005] [2021-06-05 07:03:41,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:03:41,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:41,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:03:41,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:03:41,097 INFO L87 Difference]: Start difference. First operand 182 states and 514 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:41,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:41,903 INFO L93 Difference]: Finished difference Result 545 states and 1590 transitions. [2021-06-05 07:03:41,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 07:03:41,904 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:03:41,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:41,906 INFO L225 Difference]: With dead ends: 545 [2021-06-05 07:03:41,906 INFO L226 Difference]: Without dead ends: 515 [2021-06-05 07:03:41,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1043.5ms TimeCoverageRelationStatistics Valid=269, Invalid=921, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:03:41,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-06-05 07:03:41,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 236. [2021-06-05 07:03:41,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.948936170212766) internal successors, (693), 235 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:41,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 693 transitions. [2021-06-05 07:03:41,915 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 693 transitions. Word has length 25 [2021-06-05 07:03:41,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:41,915 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 693 transitions. [2021-06-05 07:03:41,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:41,915 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 693 transitions. [2021-06-05 07:03:41,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:03:41,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:41,916 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:42,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 07:03:42,139 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:42,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:42,139 INFO L82 PathProgramCache]: Analyzing trace with hash 758582462, now seen corresponding path program 2 times [2021-06-05 07:03:42,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:42,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864726628] [2021-06-05 07:03:42,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:42,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:42,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:42,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:42,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864726628] [2021-06-05 07:03:42,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864726628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:42,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383103061] [2021-06-05 07:03:42,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:42,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:03:42,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:42,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 07:03:42,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:42,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:42,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:42,744 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 07:03:42,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 19 [2021-06-05 07:03:42,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:42,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:42,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:42,776 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:42,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 33 [2021-06-05 07:03:42,803 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:42,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:42,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:42,838 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 07:03:42,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 21 [2021-06-05 07:03:42,840 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:42,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:42,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:42,855 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:42,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 33 [2021-06-05 07:03:42,867 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:42,913 INFO L628 ElimStorePlain]: treesize reduction 18, result has 66.0 percent of original size [2021-06-05 07:03:42,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 07:03:42,915 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:35 [2021-06-05 07:03:43,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:43,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383103061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:43,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:43,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 07:03:43,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355057939] [2021-06-05 07:03:43,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:03:43,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:43,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:03:43,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:03:43,030 INFO L87 Difference]: Start difference. First operand 236 states and 693 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:44,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:44,337 INFO L93 Difference]: Finished difference Result 697 states and 2045 transitions. [2021-06-05 07:03:44,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:03:44,338 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:03:44,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:44,341 INFO L225 Difference]: With dead ends: 697 [2021-06-05 07:03:44,341 INFO L226 Difference]: Without dead ends: 682 [2021-06-05 07:03:44,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1439.8ms TimeCoverageRelationStatistics Valid=346, Invalid=1136, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:03:44,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-06-05 07:03:44,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 256. [2021-06-05 07:03:44,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 3.011764705882353) internal successors, (768), 255 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:44,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 768 transitions. [2021-06-05 07:03:44,355 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 768 transitions. Word has length 25 [2021-06-05 07:03:44,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:44,355 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 768 transitions. [2021-06-05 07:03:44,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:44,355 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 768 transitions. [2021-06-05 07:03:44,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:03:44,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:44,356 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:44,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:44,573 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:44,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:44,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1762556338, now seen corresponding path program 3 times [2021-06-05 07:03:44,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:44,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050238362] [2021-06-05 07:03:44,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:44,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:45,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:45,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:45,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050238362] [2021-06-05 07:03:45,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050238362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:45,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250212117] [2021-06-05 07:03:45,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:45,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:03:45,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:45,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 07:03:45,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:45,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:45,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250212117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:45,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:45,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 07:03:45,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282723289] [2021-06-05 07:03:45,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:03:45,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:45,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:03:45,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:03:45,372 INFO L87 Difference]: Start difference. First operand 256 states and 768 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:45,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:45,581 INFO L93 Difference]: Finished difference Result 450 states and 1268 transitions. [2021-06-05 07:03:45,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 07:03:45,581 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:03:45,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:45,584 INFO L225 Difference]: With dead ends: 450 [2021-06-05 07:03:45,585 INFO L226 Difference]: Without dead ends: 435 [2021-06-05 07:03:45,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 601.4ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:03:45,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-05 07:03:45,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 280. [2021-06-05 07:03:45,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.96415770609319) internal successors, (827), 279 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:45,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 827 transitions. [2021-06-05 07:03:45,598 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 827 transitions. Word has length 25 [2021-06-05 07:03:45,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:45,598 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 827 transitions. [2021-06-05 07:03:45,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:45,598 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 827 transitions. [2021-06-05 07:03:45,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:03:45,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:45,599 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:45,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:45,813 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:45,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:45,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1965066352, now seen corresponding path program 4 times [2021-06-05 07:03:45,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:45,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919255521] [2021-06-05 07:03:45,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:45,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:46,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:46,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:46,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919255521] [2021-06-05 07:03:46,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919255521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:46,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991153447] [2021-06-05 07:03:46,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:46,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:03:46,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:46,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 07:03:46,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:46,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:46,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991153447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:46,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:46,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 07:03:46,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394684320] [2021-06-05 07:03:46,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:03:46,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:46,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:03:46,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:03:46,504 INFO L87 Difference]: Start difference. First operand 280 states and 827 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:46,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:46,769 INFO L93 Difference]: Finished difference Result 406 states and 1141 transitions. [2021-06-05 07:03:46,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 07:03:46,769 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:03:46,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:46,771 INFO L225 Difference]: With dead ends: 406 [2021-06-05 07:03:46,771 INFO L226 Difference]: Without dead ends: 391 [2021-06-05 07:03:46,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 579.2ms TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:03:46,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-05 07:03:46,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 274. [2021-06-05 07:03:46,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.9523809523809526) internal successors, (806), 273 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:46,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 806 transitions. [2021-06-05 07:03:46,779 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 806 transitions. Word has length 25 [2021-06-05 07:03:46,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:46,779 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 806 transitions. [2021-06-05 07:03:46,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:46,779 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 806 transitions. [2021-06-05 07:03:46,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:03:46,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:46,800 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:47,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:47,023 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:47,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:47,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1336701998, now seen corresponding path program 1 times [2021-06-05 07:03:47,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:47,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485221584] [2021-06-05 07:03:47,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:47,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:47,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:47,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:47,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485221584] [2021-06-05 07:03:47,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485221584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:47,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489322042] [2021-06-05 07:03:47,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:47,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:47,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:03:47,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:47,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:47,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489322042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:47,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:47,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 07:03:47,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32353717] [2021-06-05 07:03:47,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:03:47,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:47,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:03:47,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:03:47,305 INFO L87 Difference]: Start difference. First operand 274 states and 806 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:47,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:47,382 INFO L93 Difference]: Finished difference Result 469 states and 1371 transitions. [2021-06-05 07:03:47,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:03:47,382 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:03:47,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:47,385 INFO L225 Difference]: With dead ends: 469 [2021-06-05 07:03:47,385 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 07:03:47,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 129.1ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:03:47,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 07:03:47,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 306. [2021-06-05 07:03:47,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.944262295081967) internal successors, (898), 305 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:47,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 898 transitions. [2021-06-05 07:03:47,395 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 898 transitions. Word has length 25 [2021-06-05 07:03:47,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:47,395 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 898 transitions. [2021-06-05 07:03:47,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:47,395 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 898 transitions. [2021-06-05 07:03:47,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:03:47,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:47,396 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:47,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:47,613 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:47,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:47,613 INFO L82 PathProgramCache]: Analyzing trace with hash -297591214, now seen corresponding path program 2 times [2021-06-05 07:03:47,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:47,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445808337] [2021-06-05 07:03:47,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:47,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:47,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:47,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:47,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445808337] [2021-06-05 07:03:47,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445808337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:47,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621955694] [2021-06-05 07:03:47,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:47,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:03:47,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:47,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:03:47,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:47,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:47,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621955694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:47,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:47,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 07:03:47,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628457611] [2021-06-05 07:03:47,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:03:47,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:47,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:03:47,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:03:47,883 INFO L87 Difference]: Start difference. First operand 306 states and 898 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:47,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:47,939 INFO L93 Difference]: Finished difference Result 491 states and 1441 transitions. [2021-06-05 07:03:47,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:03:47,939 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:03:47,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:47,942 INFO L225 Difference]: With dead ends: 491 [2021-06-05 07:03:47,942 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 07:03:47,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 122.3ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:03:47,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 07:03:47,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 312. [2021-06-05 07:03:47,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.945337620578778) internal successors, (916), 311 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:47,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 916 transitions. [2021-06-05 07:03:47,950 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 916 transitions. Word has length 25 [2021-06-05 07:03:47,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:47,950 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 916 transitions. [2021-06-05 07:03:47,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:47,950 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 916 transitions. [2021-06-05 07:03:47,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:03:47,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:47,951 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:48,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:48,165 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:48,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:48,165 INFO L82 PathProgramCache]: Analyzing trace with hash 127479732, now seen corresponding path program 5 times [2021-06-05 07:03:48,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:48,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789478584] [2021-06-05 07:03:48,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:48,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:48,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:48,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:48,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789478584] [2021-06-05 07:03:48,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789478584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:48,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241320570] [2021-06-05 07:03:48,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:48,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:03:48,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:48,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:03:48,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:48,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:48,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241320570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:48,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:48,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 07:03:48,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593401145] [2021-06-05 07:03:48,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:03:48,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:48,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:03:48,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:03:48,347 INFO L87 Difference]: Start difference. First operand 312 states and 916 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:48,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:48,498 INFO L93 Difference]: Finished difference Result 446 states and 1312 transitions. [2021-06-05 07:03:48,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 07:03:48,498 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:03:48,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:48,500 INFO L225 Difference]: With dead ends: 446 [2021-06-05 07:03:48,500 INFO L226 Difference]: Without dead ends: 446 [2021-06-05 07:03:48,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 124.3ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:03:48,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-05 07:03:48,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 370. [2021-06-05 07:03:48,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.035230352303523) internal successors, (1120), 369 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:48,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1120 transitions. [2021-06-05 07:03:48,507 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1120 transitions. Word has length 27 [2021-06-05 07:03:48,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:48,508 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1120 transitions. [2021-06-05 07:03:48,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:48,508 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1120 transitions. [2021-06-05 07:03:48,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:03:48,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:48,509 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:48,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-05 07:03:48,725 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:48,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:48,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1011534832, now seen corresponding path program 6 times [2021-06-05 07:03:48,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:48,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076293964] [2021-06-05 07:03:48,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:48,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:48,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:48,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:48,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076293964] [2021-06-05 07:03:48,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076293964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:48,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306998536] [2021-06-05 07:03:48,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:48,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:03:48,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:48,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:03:48,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:48,935 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:48,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306998536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:48,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:48,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 07:03:48,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337788776] [2021-06-05 07:03:48,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:03:48,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:48,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:03:48,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:03:48,937 INFO L87 Difference]: Start difference. First operand 370 states and 1120 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:49,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:49,404 INFO L93 Difference]: Finished difference Result 1017 states and 2828 transitions. [2021-06-05 07:03:49,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:03:49,405 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:03:49,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:49,410 INFO L225 Difference]: With dead ends: 1017 [2021-06-05 07:03:49,410 INFO L226 Difference]: Without dead ends: 1017 [2021-06-05 07:03:49,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 322.9ms TimeCoverageRelationStatistics Valid=337, Invalid=1069, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 07:03:49,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-06-05 07:03:49,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 409. [2021-06-05 07:03:49,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 3.1151960784313726) internal successors, (1271), 408 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:49,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1271 transitions. [2021-06-05 07:03:49,431 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1271 transitions. Word has length 27 [2021-06-05 07:03:49,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:49,432 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 1271 transitions. [2021-06-05 07:03:49,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:49,432 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1271 transitions. [2021-06-05 07:03:49,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:03:49,433 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:49,433 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:49,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:49,641 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:49,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:49,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1961184076, now seen corresponding path program 1 times [2021-06-05 07:03:49,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:49,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829362364] [2021-06-05 07:03:49,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:49,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:49,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:49,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:49,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829362364] [2021-06-05 07:03:49,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829362364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:49,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41852976] [2021-06-05 07:03:49,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:49,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:49,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 07:03:49,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:49,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:49,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41852976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:49,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:49,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 07:03:49,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676274101] [2021-06-05 07:03:49,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:03:49,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:49,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:03:49,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:03:49,793 INFO L87 Difference]: Start difference. First operand 409 states and 1271 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:50,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:50,002 INFO L93 Difference]: Finished difference Result 838 states and 2442 transitions. [2021-06-05 07:03:50,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 07:03:50,003 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:03:50,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:50,007 INFO L225 Difference]: With dead ends: 838 [2021-06-05 07:03:50,007 INFO L226 Difference]: Without dead ends: 832 [2021-06-05 07:03:50,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 126.1ms TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:03:50,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-06-05 07:03:50,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 522. [2021-06-05 07:03:50,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 3.1861804222648753) internal successors, (1660), 521 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:50,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1660 transitions. [2021-06-05 07:03:50,022 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1660 transitions. Word has length 27 [2021-06-05 07:03:50,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:50,022 INFO L482 AbstractCegarLoop]: Abstraction has 522 states and 1660 transitions. [2021-06-05 07:03:50,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:50,022 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1660 transitions. [2021-06-05 07:03:50,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:03:50,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:50,024 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:50,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 07:03:50,237 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:50,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:50,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1602477532, now seen corresponding path program 2 times [2021-06-05 07:03:50,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:50,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944363438] [2021-06-05 07:03:50,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:50,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:50,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:50,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944363438] [2021-06-05 07:03:50,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944363438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:50,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607210317] [2021-06-05 07:03:50,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:50,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:03:50,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:50,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 07:03:50,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:50,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:50,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607210317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:50,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:50,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 07:03:50,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094208857] [2021-06-05 07:03:50,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:03:50,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:50,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:03:50,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:03:50,393 INFO L87 Difference]: Start difference. First operand 522 states and 1660 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:50,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:50,603 INFO L93 Difference]: Finished difference Result 905 states and 2647 transitions. [2021-06-05 07:03:50,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 07:03:50,604 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:03:50,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:50,607 INFO L225 Difference]: With dead ends: 905 [2021-06-05 07:03:50,607 INFO L226 Difference]: Without dead ends: 905 [2021-06-05 07:03:50,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 143.3ms TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:03:50,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-06-05 07:03:50,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 524. [2021-06-05 07:03:50,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.1720841300191203) internal successors, (1659), 523 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:50,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1659 transitions. [2021-06-05 07:03:50,624 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1659 transitions. Word has length 27 [2021-06-05 07:03:50,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:50,624 INFO L482 AbstractCegarLoop]: Abstraction has 524 states and 1659 transitions. [2021-06-05 07:03:50,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:50,624 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1659 transitions. [2021-06-05 07:03:50,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:03:50,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:50,625 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:50,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:50,841 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:50,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:50,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1743996268, now seen corresponding path program 7 times [2021-06-05 07:03:50,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:50,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906300016] [2021-06-05 07:03:50,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:50,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:50,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:50,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:50,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906300016] [2021-06-05 07:03:50,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906300016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:50,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786323408] [2021-06-05 07:03:50,885 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:50,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:03:50,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:51,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:51,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786323408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:51,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:51,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 07:03:51,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002490639] [2021-06-05 07:03:51,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:03:51,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:51,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:03:51,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:03:51,031 INFO L87 Difference]: Start difference. First operand 524 states and 1659 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:51,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:51,434 INFO L93 Difference]: Finished difference Result 1149 states and 3311 transitions. [2021-06-05 07:03:51,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:03:51,434 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:03:51,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:51,438 INFO L225 Difference]: With dead ends: 1149 [2021-06-05 07:03:51,438 INFO L226 Difference]: Without dead ends: 1145 [2021-06-05 07:03:51,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 275.6ms TimeCoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:03:51,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-06-05 07:03:51,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 528. [2021-06-05 07:03:51,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 3.159392789373814) internal successors, (1665), 527 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:51,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1665 transitions. [2021-06-05 07:03:51,456 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1665 transitions. Word has length 27 [2021-06-05 07:03:51,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:51,456 INFO L482 AbstractCegarLoop]: Abstraction has 528 states and 1665 transitions. [2021-06-05 07:03:51,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:51,456 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1665 transitions. [2021-06-05 07:03:51,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:03:51,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:51,458 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:51,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 07:03:51,673 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:51,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:51,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1159578392, now seen corresponding path program 3 times [2021-06-05 07:03:51,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:51,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089012201] [2021-06-05 07:03:51,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:51,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:51,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:51,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:51,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089012201] [2021-06-05 07:03:51,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089012201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:51,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670209096] [2021-06-05 07:03:51,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:51,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:03:51,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:51,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 07:03:51,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:51,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:51,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670209096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:51,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:51,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 07:03:51,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601510889] [2021-06-05 07:03:51,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:03:51,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:51,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:03:51,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:03:51,803 INFO L87 Difference]: Start difference. First operand 528 states and 1665 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:51,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:51,976 INFO L93 Difference]: Finished difference Result 751 states and 2328 transitions. [2021-06-05 07:03:51,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 07:03:51,976 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:03:51,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:51,979 INFO L225 Difference]: With dead ends: 751 [2021-06-05 07:03:51,980 INFO L226 Difference]: Without dead ends: 751 [2021-06-05 07:03:51,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 119.7ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:03:51,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-06-05 07:03:51,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 540. [2021-06-05 07:03:51,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 3.1521335807050095) internal successors, (1699), 539 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:51,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1699 transitions. [2021-06-05 07:03:51,993 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1699 transitions. Word has length 27 [2021-06-05 07:03:51,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:51,993 INFO L482 AbstractCegarLoop]: Abstraction has 540 states and 1699 transitions. [2021-06-05 07:03:51,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:51,994 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1699 transitions. [2021-06-05 07:03:51,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:03:51,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:51,995 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:52,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:52,195 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:52,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:52,196 INFO L82 PathProgramCache]: Analyzing trace with hash -480090768, now seen corresponding path program 8 times [2021-06-05 07:03:52,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:52,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796493471] [2021-06-05 07:03:52,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:52,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:52,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:52,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:52,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796493471] [2021-06-05 07:03:52,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796493471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:52,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980803925] [2021-06-05 07:03:52,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:52,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:03:52,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:52,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:03:52,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:52,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:52,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980803925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:52,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:52,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 07:03:52,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298974710] [2021-06-05 07:03:52,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:03:52,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:52,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:03:52,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:03:52,329 INFO L87 Difference]: Start difference. First operand 540 states and 1699 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:52,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:52,549 INFO L93 Difference]: Finished difference Result 983 states and 2946 transitions. [2021-06-05 07:03:52,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:03:52,550 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:03:52,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:52,553 INFO L225 Difference]: With dead ends: 983 [2021-06-05 07:03:52,553 INFO L226 Difference]: Without dead ends: 971 [2021-06-05 07:03:52,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 142.9ms TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:03:52,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-06-05 07:03:52,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 558. [2021-06-05 07:03:52,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.1382405745062836) internal successors, (1748), 557 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:52,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 1748 transitions. [2021-06-05 07:03:52,571 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 1748 transitions. Word has length 27 [2021-06-05 07:03:52,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:52,571 INFO L482 AbstractCegarLoop]: Abstraction has 558 states and 1748 transitions. [2021-06-05 07:03:52,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:52,571 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 1748 transitions. [2021-06-05 07:03:52,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:03:52,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:52,573 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:52,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:52,796 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:52,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:52,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1407034092, now seen corresponding path program 9 times [2021-06-05 07:03:52,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:52,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462198658] [2021-06-05 07:03:52,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:52,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:52,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:52,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:52,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462198658] [2021-06-05 07:03:52,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462198658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:52,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891723672] [2021-06-05 07:03:52,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:52,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:03:52,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:52,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:03:52,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:52,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:52,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891723672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:52,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:52,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 07:03:52,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307673579] [2021-06-05 07:03:52,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:03:52,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:52,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:03:52,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:03:52,984 INFO L87 Difference]: Start difference. First operand 558 states and 1748 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:53,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:53,183 INFO L93 Difference]: Finished difference Result 983 states and 2948 transitions. [2021-06-05 07:03:53,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 07:03:53,184 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:03:53,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:53,187 INFO L225 Difference]: With dead ends: 983 [2021-06-05 07:03:53,187 INFO L226 Difference]: Without dead ends: 983 [2021-06-05 07:03:53,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 150.4ms TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:03:53,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-06-05 07:03:53,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 567. [2021-06-05 07:03:53,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 3.1696113074204946) internal successors, (1794), 566 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:53,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1794 transitions. [2021-06-05 07:03:53,202 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1794 transitions. Word has length 27 [2021-06-05 07:03:53,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:53,202 INFO L482 AbstractCegarLoop]: Abstraction has 567 states and 1794 transitions. [2021-06-05 07:03:53,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:53,202 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1794 transitions. [2021-06-05 07:03:53,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:03:53,203 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:53,204 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:53,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:53,417 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:53,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:53,417 INFO L82 PathProgramCache]: Analyzing trace with hash 2004028396, now seen corresponding path program 10 times [2021-06-05 07:03:53,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:53,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267994975] [2021-06-05 07:03:53,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:53,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:53,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:53,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:53,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267994975] [2021-06-05 07:03:53,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267994975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:53,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656067920] [2021-06-05 07:03:53,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:53,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:03:53,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:53,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:03:53,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:53,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:53,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656067920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:53,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:53,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 07:03:53,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078986381] [2021-06-05 07:03:53,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:03:53,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:53,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:03:53,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:03:53,604 INFO L87 Difference]: Start difference. First operand 567 states and 1794 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:54,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:54,113 INFO L93 Difference]: Finished difference Result 1871 states and 5394 transitions. [2021-06-05 07:03:54,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:03:54,114 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:03:54,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:54,121 INFO L225 Difference]: With dead ends: 1871 [2021-06-05 07:03:54,121 INFO L226 Difference]: Without dead ends: 1871 [2021-06-05 07:03:54,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 335.2ms TimeCoverageRelationStatistics Valid=357, Invalid=1125, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:03:54,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2021-06-05 07:03:54,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 640. [2021-06-05 07:03:54,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 3.29264475743349) internal successors, (2104), 639 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:54,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 2104 transitions. [2021-06-05 07:03:54,146 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 2104 transitions. Word has length 27 [2021-06-05 07:03:54,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:54,147 INFO L482 AbstractCegarLoop]: Abstraction has 640 states and 2104 transitions. [2021-06-05 07:03:54,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:54,147 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 2104 transitions. [2021-06-05 07:03:54,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:03:54,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:54,148 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:54,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:54,371 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:54,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:54,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1558477464, now seen corresponding path program 11 times [2021-06-05 07:03:54,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:54,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449197106] [2021-06-05 07:03:54,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:54,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:54,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:54,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:54,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449197106] [2021-06-05 07:03:54,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449197106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:54,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985815807] [2021-06-05 07:03:54,422 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:54,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:03:54,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:54,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:03:54,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:54,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:54,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985815807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:54,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:54,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 07:03:54,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788191262] [2021-06-05 07:03:54,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:03:54,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:54,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:03:54,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:03:54,522 INFO L87 Difference]: Start difference. First operand 640 states and 2104 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:54,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:54,984 INFO L93 Difference]: Finished difference Result 1774 states and 5180 transitions. [2021-06-05 07:03:54,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:03:54,984 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:03:54,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:54,992 INFO L225 Difference]: With dead ends: 1774 [2021-06-05 07:03:54,992 INFO L226 Difference]: Without dead ends: 1766 [2021-06-05 07:03:54,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 313.2ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:03:54,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2021-06-05 07:03:55,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 628. [2021-06-05 07:03:55,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 3.291866028708134) internal successors, (2064), 627 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:55,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 2064 transitions. [2021-06-05 07:03:55,015 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 2064 transitions. Word has length 27 [2021-06-05 07:03:55,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:55,015 INFO L482 AbstractCegarLoop]: Abstraction has 628 states and 2064 transitions. [2021-06-05 07:03:55,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:55,016 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 2064 transitions. [2021-06-05 07:03:55,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:03:55,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:55,017 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:55,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-06-05 07:03:55,233 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:55,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:55,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1799894256, now seen corresponding path program 12 times [2021-06-05 07:03:55,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:55,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371000934] [2021-06-05 07:03:55,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:55,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:55,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:55,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:55,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371000934] [2021-06-05 07:03:55,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371000934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:55,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770747281] [2021-06-05 07:03:55,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:55,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:03:55,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:55,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:03:55,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:55,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:55,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770747281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:55,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:55,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 07:03:55,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131089266] [2021-06-05 07:03:55,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:03:55,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:55,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:03:55,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:03:55,460 INFO L87 Difference]: Start difference. First operand 628 states and 2064 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:56,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:56,177 INFO L93 Difference]: Finished difference Result 1916 states and 5637 transitions. [2021-06-05 07:03:56,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:03:56,177 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:03:56,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:56,208 INFO L225 Difference]: With dead ends: 1916 [2021-06-05 07:03:56,208 INFO L226 Difference]: Without dead ends: 1916 [2021-06-05 07:03:56,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 496.1ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:03:56,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2021-06-05 07:03:56,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 645. [2021-06-05 07:03:56,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 3.340062111801242) internal successors, (2151), 644 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:56,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 2151 transitions. [2021-06-05 07:03:56,262 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 2151 transitions. Word has length 27 [2021-06-05 07:03:56,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:56,263 INFO L482 AbstractCegarLoop]: Abstraction has 645 states and 2151 transitions. [2021-06-05 07:03:56,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:56,263 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 2151 transitions. [2021-06-05 07:03:56,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:03:56,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:56,265 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:56,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:56,485 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:56,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:56,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1036250512, now seen corresponding path program 13 times [2021-06-05 07:03:56,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:56,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897126388] [2021-06-05 07:03:56,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:56,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:56,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:56,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:56,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897126388] [2021-06-05 07:03:56,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897126388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:56,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276916451] [2021-06-05 07:03:56,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:56,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:03:56,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:56,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:56,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276916451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:56,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:56,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 07:03:56,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643033665] [2021-06-05 07:03:56,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:03:56,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:56,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:03:56,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:03:56,707 INFO L87 Difference]: Start difference. First operand 645 states and 2151 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:57,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:57,292 INFO L93 Difference]: Finished difference Result 1888 states and 5563 transitions. [2021-06-05 07:03:57,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:03:57,292 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:03:57,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:57,296 INFO L225 Difference]: With dead ends: 1888 [2021-06-05 07:03:57,296 INFO L226 Difference]: Without dead ends: 1888 [2021-06-05 07:03:57,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 404.3ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:03:57,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2021-06-05 07:03:57,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 635. [2021-06-05 07:03:57,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 3.326498422712934) internal successors, (2109), 634 states have internal predecessors, (2109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:57,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 2109 transitions. [2021-06-05 07:03:57,316 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 2109 transitions. Word has length 27 [2021-06-05 07:03:57,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:57,316 INFO L482 AbstractCegarLoop]: Abstraction has 635 states and 2109 transitions. [2021-06-05 07:03:57,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:57,316 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 2109 transitions. [2021-06-05 07:03:57,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:03:57,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:57,318 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:57,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:57,533 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:57,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:57,533 INFO L82 PathProgramCache]: Analyzing trace with hash 904089908, now seen corresponding path program 14 times [2021-06-05 07:03:57,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:57,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454966822] [2021-06-05 07:03:57,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:57,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:57,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:57,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:57,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454966822] [2021-06-05 07:03:57,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454966822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:57,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143532532] [2021-06-05 07:03:57,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:57,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:03:57,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:57,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:03:57,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:57,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:57,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143532532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:57,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:57,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 07:03:57,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419044596] [2021-06-05 07:03:57,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:03:57,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:57,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:03:57,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:03:57,756 INFO L87 Difference]: Start difference. First operand 635 states and 2109 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:57,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:57,945 INFO L93 Difference]: Finished difference Result 912 states and 2859 transitions. [2021-06-05 07:03:57,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 07:03:57,946 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:03:57,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:57,948 INFO L225 Difference]: With dead ends: 912 [2021-06-05 07:03:57,948 INFO L226 Difference]: Without dead ends: 902 [2021-06-05 07:03:57,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 151.6ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:03:57,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2021-06-05 07:03:57,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 639. [2021-06-05 07:03:57,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.29153605015674) internal successors, (2100), 638 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:57,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2100 transitions. [2021-06-05 07:03:57,991 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2100 transitions. Word has length 27 [2021-06-05 07:03:57,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:57,991 INFO L482 AbstractCegarLoop]: Abstraction has 639 states and 2100 transitions. [2021-06-05 07:03:57,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:57,991 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2100 transitions. [2021-06-05 07:03:57,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:03:57,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:57,993 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:58,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-05 07:03:58,213 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:58,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:58,213 INFO L82 PathProgramCache]: Analyzing trace with hash -285121176, now seen corresponding path program 15 times [2021-06-05 07:03:58,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:58,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338342407] [2021-06-05 07:03:58,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:58,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:58,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:58,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:58,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338342407] [2021-06-05 07:03:58,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338342407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:58,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390607727] [2021-06-05 07:03:58,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:58,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:03:58,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:58,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:03:58,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:58,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:58,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390607727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:58,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:58,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 07:03:58,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393054330] [2021-06-05 07:03:58,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:03:58,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:58,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:03:58,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:03:58,426 INFO L87 Difference]: Start difference. First operand 639 states and 2100 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:58,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:58,961 INFO L93 Difference]: Finished difference Result 1623 states and 4845 transitions. [2021-06-05 07:03:58,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:03:58,962 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:03:58,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:58,965 INFO L225 Difference]: With dead ends: 1623 [2021-06-05 07:03:58,965 INFO L226 Difference]: Without dead ends: 1615 [2021-06-05 07:03:58,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 316.4ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:03:58,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2021-06-05 07:03:58,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 657. [2021-06-05 07:03:58,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 3.285060975609756) internal successors, (2155), 656 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:59,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 2155 transitions. [2021-06-05 07:03:59,018 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 2155 transitions. Word has length 27 [2021-06-05 07:03:59,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:59,018 INFO L482 AbstractCegarLoop]: Abstraction has 657 states and 2155 transitions. [2021-06-05 07:03:59,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:59,019 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 2155 transitions. [2021-06-05 07:03:59,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:03:59,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:59,028 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:59,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:59,249 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:59,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:59,249 INFO L82 PathProgramCache]: Analyzing trace with hash 693436268, now seen corresponding path program 16 times [2021-06-05 07:03:59,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:59,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522776575] [2021-06-05 07:03:59,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:59,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:59,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:59,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:59,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522776575] [2021-06-05 07:03:59,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522776575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:59,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952470742] [2021-06-05 07:03:59,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:59,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:03:59,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:59,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:03:59,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:59,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:59,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952470742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:59,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:59,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 07:03:59,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846136557] [2021-06-05 07:03:59,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:03:59,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:59,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:03:59,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:03:59,467 INFO L87 Difference]: Start difference. First operand 657 states and 2155 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:59,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:59,996 INFO L93 Difference]: Finished difference Result 1707 states and 5021 transitions. [2021-06-05 07:03:59,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:03:59,997 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:03:59,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:00,001 INFO L225 Difference]: With dead ends: 1707 [2021-06-05 07:04:00,001 INFO L226 Difference]: Without dead ends: 1707 [2021-06-05 07:04:00,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 351.2ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:04:00,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-06-05 07:04:00,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 642. [2021-06-05 07:04:00,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 3.282371294851794) internal successors, (2104), 641 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:00,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 2104 transitions. [2021-06-05 07:04:00,043 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 2104 transitions. Word has length 27 [2021-06-05 07:04:00,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:00,043 INFO L482 AbstractCegarLoop]: Abstraction has 642 states and 2104 transitions. [2021-06-05 07:04:00,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:00,044 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 2104 transitions. [2021-06-05 07:04:00,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:00,045 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:00,045 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:00,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 07:04:00,266 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:00,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:00,267 INFO L82 PathProgramCache]: Analyzing trace with hash 339248496, now seen corresponding path program 17 times [2021-06-05 07:04:00,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:00,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471959985] [2021-06-05 07:04:00,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:00,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:00,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:00,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:00,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471959985] [2021-06-05 07:04:00,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471959985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:00,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675265327] [2021-06-05 07:04:00,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:00,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:04:00,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:00,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:00,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:00,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:00,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675265327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:00,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:00,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:04:00,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520633486] [2021-06-05 07:04:00,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:04:00,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:00,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:04:00,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:04:00,475 INFO L87 Difference]: Start difference. First operand 642 states and 2104 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:00,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:00,702 INFO L93 Difference]: Finished difference Result 1202 states and 3649 transitions. [2021-06-05 07:04:00,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 07:04:00,702 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:00,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:00,705 INFO L225 Difference]: With dead ends: 1202 [2021-06-05 07:04:00,705 INFO L226 Difference]: Without dead ends: 1190 [2021-06-05 07:04:00,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 150.1ms TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:04:00,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2021-06-05 07:04:00,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 664. [2021-06-05 07:04:00,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 3.2654600301659125) internal successors, (2165), 663 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:00,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 2165 transitions. [2021-06-05 07:04:00,722 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 2165 transitions. Word has length 27 [2021-06-05 07:04:00,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:00,722 INFO L482 AbstractCegarLoop]: Abstraction has 664 states and 2165 transitions. [2021-06-05 07:04:00,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:00,722 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 2165 transitions. [2021-06-05 07:04:00,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:00,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:00,723 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:00,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 07:04:00,941 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:00,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:00,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1260950636, now seen corresponding path program 18 times [2021-06-05 07:04:00,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:00,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596703371] [2021-06-05 07:04:00,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:00,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:00,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:00,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:00,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596703371] [2021-06-05 07:04:00,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596703371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:00,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431697377] [2021-06-05 07:04:00,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:01,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:04:01,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:01,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:01,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:01,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:01,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431697377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:01,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:01,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:04:01,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777657322] [2021-06-05 07:04:01,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:04:01,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:01,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:04:01,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:04:01,085 INFO L87 Difference]: Start difference. First operand 664 states and 2165 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:01,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:01,371 INFO L93 Difference]: Finished difference Result 1451 states and 4277 transitions. [2021-06-05 07:04:01,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:04:01,372 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:01,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:01,375 INFO L225 Difference]: With dead ends: 1451 [2021-06-05 07:04:01,375 INFO L226 Difference]: Without dead ends: 1443 [2021-06-05 07:04:01,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:04:01,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2021-06-05 07:04:01,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 703. [2021-06-05 07:04:01,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 3.274928774928775) internal successors, (2299), 702 states have internal predecessors, (2299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:01,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2299 transitions. [2021-06-05 07:04:01,395 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2299 transitions. Word has length 27 [2021-06-05 07:04:01,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:01,395 INFO L482 AbstractCegarLoop]: Abstraction has 703 states and 2299 transitions. [2021-06-05 07:04:01,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:01,395 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2299 transitions. [2021-06-05 07:04:01,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:01,397 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:01,397 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:01,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:01,619 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:01,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:01,620 INFO L82 PathProgramCache]: Analyzing trace with hash -2055459216, now seen corresponding path program 19 times [2021-06-05 07:04:01,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:01,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164285661] [2021-06-05 07:04:01,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:01,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:01,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:01,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:01,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164285661] [2021-06-05 07:04:01,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164285661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:01,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897143003] [2021-06-05 07:04:01,661 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:01,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:01,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:01,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:01,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:01,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897143003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:01,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:01,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:04:01,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259429632] [2021-06-05 07:04:01,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:04:01,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:01,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:04:01,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:04:01,762 INFO L87 Difference]: Start difference. First operand 703 states and 2299 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:02,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:02,119 INFO L93 Difference]: Finished difference Result 1579 states and 4588 transitions. [2021-06-05 07:04:02,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:04:02,119 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:02,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:02,121 INFO L225 Difference]: With dead ends: 1579 [2021-06-05 07:04:02,121 INFO L226 Difference]: Without dead ends: 1579 [2021-06-05 07:04:02,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 231.3ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:04:02,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2021-06-05 07:04:02,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 697. [2021-06-05 07:04:02,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 3.281609195402299) internal successors, (2284), 696 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:02,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 2284 transitions. [2021-06-05 07:04:02,138 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 2284 transitions. Word has length 27 [2021-06-05 07:04:02,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:02,138 INFO L482 AbstractCegarLoop]: Abstraction has 697 states and 2284 transitions. [2021-06-05 07:04:02,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:02,138 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 2284 transitions. [2021-06-05 07:04:02,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:02,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:02,139 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:02,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:02,342 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:02,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:02,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1812947492, now seen corresponding path program 20 times [2021-06-05 07:04:02,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:02,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078954255] [2021-06-05 07:04:02,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:02,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:02,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:02,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:02,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078954255] [2021-06-05 07:04:02,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078954255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:02,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033449456] [2021-06-05 07:04:02,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:02,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:04:02,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:02,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:02,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:02,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:02,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033449456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:02,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:02,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 07:04:02,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795479614] [2021-06-05 07:04:02,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:04:02,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:02,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:04:02,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:04:02,496 INFO L87 Difference]: Start difference. First operand 697 states and 2284 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:02,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:02,783 INFO L93 Difference]: Finished difference Result 1913 states and 5956 transitions. [2021-06-05 07:04:02,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 07:04:02,784 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:02,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:02,786 INFO L225 Difference]: With dead ends: 1913 [2021-06-05 07:04:02,786 INFO L226 Difference]: Without dead ends: 1913 [2021-06-05 07:04:02,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 209.6ms TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:04:02,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-06-05 07:04:02,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 898. [2021-06-05 07:04:02,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.4247491638795986) internal successors, (3072), 897 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:02,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 3072 transitions. [2021-06-05 07:04:02,805 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 3072 transitions. Word has length 27 [2021-06-05 07:04:02,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:02,805 INFO L482 AbstractCegarLoop]: Abstraction has 898 states and 3072 transitions. [2021-06-05 07:04:02,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:02,805 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 3072 transitions. [2021-06-05 07:04:02,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:02,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:02,807 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:03,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:03,029 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:03,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:03,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1979075620, now seen corresponding path program 21 times [2021-06-05 07:04:03,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:03,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730650907] [2021-06-05 07:04:03,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:03,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:03,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:03,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:03,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730650907] [2021-06-05 07:04:03,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730650907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:03,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981823820] [2021-06-05 07:04:03,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:03,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:04:03,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:03,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:03,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:03,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:03,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981823820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:03,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:03,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 07:04:03,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611902177] [2021-06-05 07:04:03,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:04:03,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:03,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:04:03,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:04:03,195 INFO L87 Difference]: Start difference. First operand 898 states and 3072 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:03,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:03,492 INFO L93 Difference]: Finished difference Result 1741 states and 5401 transitions. [2021-06-05 07:04:03,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 07:04:03,492 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:03,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:03,494 INFO L225 Difference]: With dead ends: 1741 [2021-06-05 07:04:03,494 INFO L226 Difference]: Without dead ends: 1731 [2021-06-05 07:04:03,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 217.4ms TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:04:03,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2021-06-05 07:04:03,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 895. [2021-06-05 07:04:03,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 3.4004474272930647) internal successors, (3040), 894 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:03,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3040 transitions. [2021-06-05 07:04:03,517 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3040 transitions. Word has length 27 [2021-06-05 07:04:03,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:03,517 INFO L482 AbstractCegarLoop]: Abstraction has 895 states and 3040 transitions. [2021-06-05 07:04:03,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:03,517 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3040 transitions. [2021-06-05 07:04:03,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:03,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:03,519 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:03,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:03,733 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:03,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:03,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1712063380, now seen corresponding path program 22 times [2021-06-05 07:04:03,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:03,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135493033] [2021-06-05 07:04:03,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:03,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:03,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:03,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:03,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135493033] [2021-06-05 07:04:03,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135493033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:03,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352771609] [2021-06-05 07:04:03,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:03,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:04:03,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:03,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:03,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:03,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:03,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352771609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:03,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:03,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 07:04:03,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468098465] [2021-06-05 07:04:03,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:04:03,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:03,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:04:03,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:04:03,892 INFO L87 Difference]: Start difference. First operand 895 states and 3040 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:04,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:04,221 INFO L93 Difference]: Finished difference Result 1821 states and 5773 transitions. [2021-06-05 07:04:04,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:04:04,221 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:04,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:04,224 INFO L225 Difference]: With dead ends: 1821 [2021-06-05 07:04:04,224 INFO L226 Difference]: Without dead ends: 1821 [2021-06-05 07:04:04,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 204.9ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:04:04,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-06-05 07:04:04,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 922. [2021-06-05 07:04:04,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.3832790445168297) internal successors, (3116), 921 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:04,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3116 transitions. [2021-06-05 07:04:04,242 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3116 transitions. Word has length 27 [2021-06-05 07:04:04,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:04,242 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 3116 transitions. [2021-06-05 07:04:04,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:04,242 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3116 transitions. [2021-06-05 07:04:04,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:04,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:04,245 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:04,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:04,465 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:04,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:04,465 INFO L82 PathProgramCache]: Analyzing trace with hash -406491114, now seen corresponding path program 23 times [2021-06-05 07:04:04,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:04,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972204416] [2021-06-05 07:04:04,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:04,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:04,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:04,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:04,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972204416] [2021-06-05 07:04:04,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972204416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:04,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299247048] [2021-06-05 07:04:04,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:04,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:04:04,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:04,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:04,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:04,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:04,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299247048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:04,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:04,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 07:04:04,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738059003] [2021-06-05 07:04:04,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:04:04,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:04,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:04:04,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:04:04,621 INFO L87 Difference]: Start difference. First operand 922 states and 3116 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:04,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:04,809 INFO L93 Difference]: Finished difference Result 1342 states and 4285 transitions. [2021-06-05 07:04:04,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 07:04:04,809 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:04,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:04,812 INFO L225 Difference]: With dead ends: 1342 [2021-06-05 07:04:04,812 INFO L226 Difference]: Without dead ends: 1311 [2021-06-05 07:04:04,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 144.3ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:04:04,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2021-06-05 07:04:04,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 986. [2021-06-05 07:04:04,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 3.3573604060913707) internal successors, (3307), 985 states have internal predecessors, (3307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:04,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 3307 transitions. [2021-06-05 07:04:04,832 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 3307 transitions. Word has length 27 [2021-06-05 07:04:04,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:04,832 INFO L482 AbstractCegarLoop]: Abstraction has 986 states and 3307 transitions. [2021-06-05 07:04:04,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:04,832 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 3307 transitions. [2021-06-05 07:04:04,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:04,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:04,834 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:05,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-06-05 07:04:05,058 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:05,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:05,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1176867492, now seen corresponding path program 24 times [2021-06-05 07:04:05,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:05,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662067258] [2021-06-05 07:04:05,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:05,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:05,096 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:05,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:05,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662067258] [2021-06-05 07:04:05,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662067258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:05,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348801304] [2021-06-05 07:04:05,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:05,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:04:05,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:05,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:05,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:05,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:05,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348801304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:05,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:05,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:04:05,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156790981] [2021-06-05 07:04:05,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:04:05,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:05,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:04:05,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:04:05,183 INFO L87 Difference]: Start difference. First operand 986 states and 3307 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:05,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:05,540 INFO L93 Difference]: Finished difference Result 2119 states and 6592 transitions. [2021-06-05 07:04:05,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:04:05,540 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:05,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:05,543 INFO L225 Difference]: With dead ends: 2119 [2021-06-05 07:04:05,543 INFO L226 Difference]: Without dead ends: 2115 [2021-06-05 07:04:05,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 205.6ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:04:05,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2021-06-05 07:04:05,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1074. [2021-06-05 07:04:05,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 3.341099720410065) internal successors, (3585), 1073 states have internal predecessors, (3585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:05,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 3585 transitions. [2021-06-05 07:04:05,563 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 3585 transitions. Word has length 27 [2021-06-05 07:04:05,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:05,563 INFO L482 AbstractCegarLoop]: Abstraction has 1074 states and 3585 transitions. [2021-06-05 07:04:05,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:05,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 3585 transitions. [2021-06-05 07:04:05,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:05,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:05,565 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:05,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:05,769 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:05,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:05,769 INFO L82 PathProgramCache]: Analyzing trace with hash -198310048, now seen corresponding path program 25 times [2021-06-05 07:04:05,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:05,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644534130] [2021-06-05 07:04:05,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:05,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:05,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:05,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644534130] [2021-06-05 07:04:05,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644534130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:05,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143816656] [2021-06-05 07:04:05,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:05,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:05,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:05,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:05,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:05,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143816656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:05,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:05,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:04:05,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152223296] [2021-06-05 07:04:05,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:04:05,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:05,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:04:05,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:04:05,910 INFO L87 Difference]: Start difference. First operand 1074 states and 3585 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:06,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:06,346 INFO L93 Difference]: Finished difference Result 2273 states and 6985 transitions. [2021-06-05 07:04:06,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:04:06,347 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:06,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:06,350 INFO L225 Difference]: With dead ends: 2273 [2021-06-05 07:04:06,350 INFO L226 Difference]: Without dead ends: 2273 [2021-06-05 07:04:06,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 263.6ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:04:06,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2021-06-05 07:04:06,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 1032. [2021-06-05 07:04:06,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1031 states have (on average 3.344325897187197) internal successors, (3448), 1031 states have internal predecessors, (3448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:06,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 3448 transitions. [2021-06-05 07:04:06,372 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 3448 transitions. Word has length 27 [2021-06-05 07:04:06,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:06,372 INFO L482 AbstractCegarLoop]: Abstraction has 1032 states and 3448 transitions. [2021-06-05 07:04:06,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:06,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 3448 transitions. [2021-06-05 07:04:06,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:06,374 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:06,374 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:06,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-06-05 07:04:06,589 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:06,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:06,589 INFO L82 PathProgramCache]: Analyzing trace with hash 2016185652, now seen corresponding path program 26 times [2021-06-05 07:04:06,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:06,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320253502] [2021-06-05 07:04:06,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:06,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:06,629 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:06,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:06,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320253502] [2021-06-05 07:04:06,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320253502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:06,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111516311] [2021-06-05 07:04:06,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:06,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:04:06,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:06,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:06,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:06,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:06,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111516311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:06,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:06,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:04:06,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923216255] [2021-06-05 07:04:06,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:04:06,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:06,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:04:06,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:04:06,755 INFO L87 Difference]: Start difference. First operand 1032 states and 3448 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:07,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:07,021 INFO L93 Difference]: Finished difference Result 2014 states and 6277 transitions. [2021-06-05 07:04:07,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 07:04:07,021 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:07,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:07,023 INFO L225 Difference]: With dead ends: 2014 [2021-06-05 07:04:07,023 INFO L226 Difference]: Without dead ends: 2014 [2021-06-05 07:04:07,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 161.6ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:04:07,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2021-06-05 07:04:07,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1044. [2021-06-05 07:04:07,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1043 states have (on average 3.340364333652924) internal successors, (3484), 1043 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:07,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 3484 transitions. [2021-06-05 07:04:07,040 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 3484 transitions. Word has length 27 [2021-06-05 07:04:07,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:07,041 INFO L482 AbstractCegarLoop]: Abstraction has 1044 states and 3484 transitions. [2021-06-05 07:04:07,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:07,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 3484 transitions. [2021-06-05 07:04:07,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:07,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:07,043 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:07,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:07,245 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:07,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:07,245 INFO L82 PathProgramCache]: Analyzing trace with hash -499902228, now seen corresponding path program 27 times [2021-06-05 07:04:07,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:07,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511979192] [2021-06-05 07:04:07,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:07,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:07,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:07,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:07,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511979192] [2021-06-05 07:04:07,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511979192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:07,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191828482] [2021-06-05 07:04:07,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:07,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:04:07,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:07,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:07,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:07,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:07,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191828482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:07,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:07,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 07:04:07,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225709458] [2021-06-05 07:04:07,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:04:07,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:07,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:04:07,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:04:07,359 INFO L87 Difference]: Start difference. First operand 1044 states and 3484 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:07,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:07,585 INFO L93 Difference]: Finished difference Result 1776 states and 5488 transitions. [2021-06-05 07:04:07,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:04:07,585 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:07,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:07,588 INFO L225 Difference]: With dead ends: 1776 [2021-06-05 07:04:07,588 INFO L226 Difference]: Without dead ends: 1764 [2021-06-05 07:04:07,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 123.8ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:04:07,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1764 states. [2021-06-05 07:04:07,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1764 to 1102. [2021-06-05 07:04:07,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1101 states have (on average 3.321525885558583) internal successors, (3657), 1101 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:07,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 3657 transitions. [2021-06-05 07:04:07,606 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 3657 transitions. Word has length 27 [2021-06-05 07:04:07,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:07,607 INFO L482 AbstractCegarLoop]: Abstraction has 1102 states and 3657 transitions. [2021-06-05 07:04:07,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:07,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 3657 transitions. [2021-06-05 07:04:07,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:07,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:07,609 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:07,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 07:04:07,833 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:07,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:07,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1595195728, now seen corresponding path program 28 times [2021-06-05 07:04:07,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:07,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949021501] [2021-06-05 07:04:07,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:07,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:07,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:07,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:07,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949021501] [2021-06-05 07:04:07,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949021501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:07,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292248725] [2021-06-05 07:04:07,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:07,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:04:07,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:07,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:07,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:07,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:07,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292248725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:07,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:07,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 07:04:07,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969465476] [2021-06-05 07:04:07,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:04:07,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:07,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:04:07,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:04:07,974 INFO L87 Difference]: Start difference. First operand 1102 states and 3657 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:08,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:08,277 INFO L93 Difference]: Finished difference Result 1940 states and 5945 transitions. [2021-06-05 07:04:08,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:04:08,278 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:08,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:08,280 INFO L225 Difference]: With dead ends: 1940 [2021-06-05 07:04:08,280 INFO L226 Difference]: Without dead ends: 1940 [2021-06-05 07:04:08,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 185.0ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:04:08,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-06-05 07:04:08,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1158. [2021-06-05 07:04:08,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1157 states have (on average 3.3094209161624892) internal successors, (3829), 1157 states have internal predecessors, (3829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:08,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 3829 transitions. [2021-06-05 07:04:08,299 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 3829 transitions. Word has length 27 [2021-06-05 07:04:08,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:08,299 INFO L482 AbstractCegarLoop]: Abstraction has 1158 states and 3829 transitions. [2021-06-05 07:04:08,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:08,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 3829 transitions. [2021-06-05 07:04:08,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:08,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:08,301 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:08,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 07:04:08,501 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:08,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:08,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1507209712, now seen corresponding path program 3 times [2021-06-05 07:04:08,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:08,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163770665] [2021-06-05 07:04:08,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:08,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:08,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:08,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:08,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163770665] [2021-06-05 07:04:08,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163770665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:08,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022871167] [2021-06-05 07:04:08,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 07:04:08,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:04:08,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:08,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:08,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:08,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:08,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022871167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:08,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:08,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 07:04:08,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542899781] [2021-06-05 07:04:08,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:04:08,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:08,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:04:08,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:04:08,651 INFO L87 Difference]: Start difference. First operand 1158 states and 3829 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:08,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:08,918 INFO L93 Difference]: Finished difference Result 1759 states and 5449 transitions. [2021-06-05 07:04:08,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 07:04:08,919 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:08,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:08,921 INFO L225 Difference]: With dead ends: 1759 [2021-06-05 07:04:08,921 INFO L226 Difference]: Without dead ends: 1759 [2021-06-05 07:04:08,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 195.4ms TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:04:08,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2021-06-05 07:04:08,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1180. [2021-06-05 07:04:08,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.3078880407124682) internal successors, (3900), 1179 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:08,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3900 transitions. [2021-06-05 07:04:08,944 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3900 transitions. Word has length 27 [2021-06-05 07:04:08,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:08,946 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3900 transitions. [2021-06-05 07:04:08,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:08,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3900 transitions. [2021-06-05 07:04:08,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:08,948 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:08,948 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:09,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 07:04:09,170 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:09,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:09,170 INFO L82 PathProgramCache]: Analyzing trace with hash 877590964, now seen corresponding path program 4 times [2021-06-05 07:04:09,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:09,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145112903] [2021-06-05 07:04:09,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:09,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:09,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:09,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:09,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145112903] [2021-06-05 07:04:09,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145112903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:09,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502373504] [2021-06-05 07:04:09,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:09,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:04:09,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:09,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 07:04:09,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:09,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:09,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502373504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:09,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:09,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 07:04:09,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948753596] [2021-06-05 07:04:09,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:04:09,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:09,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:04:09,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:04:09,277 INFO L87 Difference]: Start difference. First operand 1180 states and 3900 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:09,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:09,391 INFO L93 Difference]: Finished difference Result 1872 states and 5977 transitions. [2021-06-05 07:04:09,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 07:04:09,391 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:09,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:09,394 INFO L225 Difference]: With dead ends: 1872 [2021-06-05 07:04:09,394 INFO L226 Difference]: Without dead ends: 1854 [2021-06-05 07:04:09,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:04:09,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2021-06-05 07:04:09,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1389. [2021-06-05 07:04:09,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1389 states, 1388 states have (on average 3.3746397694524495) internal successors, (4684), 1388 states have internal predecessors, (4684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:09,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1389 states to 1389 states and 4684 transitions. [2021-06-05 07:04:09,417 INFO L78 Accepts]: Start accepts. Automaton has 1389 states and 4684 transitions. Word has length 27 [2021-06-05 07:04:09,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:09,417 INFO L482 AbstractCegarLoop]: Abstraction has 1389 states and 4684 transitions. [2021-06-05 07:04:09,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:09,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1389 states and 4684 transitions. [2021-06-05 07:04:09,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:09,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:09,419 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:09,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 07:04:09,620 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:09,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:09,620 INFO L82 PathProgramCache]: Analyzing trace with hash 118622872, now seen corresponding path program 5 times [2021-06-05 07:04:09,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:09,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152440095] [2021-06-05 07:04:09,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:09,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:09,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:09,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:09,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152440095] [2021-06-05 07:04:09,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152440095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:09,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160485114] [2021-06-05 07:04:09,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:09,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:04:09,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:09,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 07:04:09,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:09,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:09,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160485114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:09,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:09,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-06-05 07:04:09,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950757263] [2021-06-05 07:04:09,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:04:09,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:09,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:04:09,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:04:09,742 INFO L87 Difference]: Start difference. First operand 1389 states and 4684 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:09,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:09,875 INFO L93 Difference]: Finished difference Result 2133 states and 6693 transitions. [2021-06-05 07:04:09,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 07:04:09,875 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:09,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:09,886 INFO L225 Difference]: With dead ends: 2133 [2021-06-05 07:04:09,886 INFO L226 Difference]: Without dead ends: 2133 [2021-06-05 07:04:09,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:04:09,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2021-06-05 07:04:09,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 1392. [2021-06-05 07:04:09,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.3608914450035945) internal successors, (4675), 1391 states have internal predecessors, (4675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:09,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4675 transitions. [2021-06-05 07:04:09,912 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4675 transitions. Word has length 27 [2021-06-05 07:04:09,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:09,912 INFO L482 AbstractCegarLoop]: Abstraction has 1392 states and 4675 transitions. [2021-06-05 07:04:09,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:09,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4675 transitions. [2021-06-05 07:04:09,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:09,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:09,915 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:10,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 07:04:10,129 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:10,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:10,129 INFO L82 PathProgramCache]: Analyzing trace with hash 260141608, now seen corresponding path program 6 times [2021-06-05 07:04:10,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:10,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341238042] [2021-06-05 07:04:10,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:10,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:10,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:10,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:10,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341238042] [2021-06-05 07:04:10,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341238042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:10,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059925595] [2021-06-05 07:04:10,171 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:10,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:04:10,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:10,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:10,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:10,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059925595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:10,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:10,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-06-05 07:04:10,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081353660] [2021-06-05 07:04:10,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:04:10,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:10,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:04:10,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:04:10,277 INFO L87 Difference]: Start difference. First operand 1392 states and 4675 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:10,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:10,528 INFO L93 Difference]: Finished difference Result 2050 states and 6469 transitions. [2021-06-05 07:04:10,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 07:04:10,529 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:10,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:10,532 INFO L225 Difference]: With dead ends: 2050 [2021-06-05 07:04:10,533 INFO L226 Difference]: Without dead ends: 2046 [2021-06-05 07:04:10,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 171.2ms TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:04:10,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-06-05 07:04:10,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1392. [2021-06-05 07:04:10,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.359453630481668) internal successors, (4673), 1391 states have internal predecessors, (4673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:10,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4673 transitions. [2021-06-05 07:04:10,563 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4673 transitions. Word has length 27 [2021-06-05 07:04:10,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:10,563 INFO L482 AbstractCegarLoop]: Abstraction has 1392 states and 4673 transitions. [2021-06-05 07:04:10,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:10,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4673 transitions. [2021-06-05 07:04:10,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:10,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:10,566 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:10,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 07:04:10,791 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:10,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:10,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1708393328, now seen corresponding path program 7 times [2021-06-05 07:04:10,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:10,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263687680] [2021-06-05 07:04:10,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:10,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:10,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:10,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263687680] [2021-06-05 07:04:10,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263687680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:10,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744759237] [2021-06-05 07:04:10,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:10,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:10,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:10,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:10,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:10,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744759237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:10,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:10,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-06-05 07:04:10,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087045131] [2021-06-05 07:04:10,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:04:10,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:10,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:04:10,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:04:10,933 INFO L87 Difference]: Start difference. First operand 1392 states and 4673 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:11,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:11,227 INFO L93 Difference]: Finished difference Result 2257 states and 7002 transitions. [2021-06-05 07:04:11,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:04:11,228 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:11,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:11,230 INFO L225 Difference]: With dead ends: 2257 [2021-06-05 07:04:11,230 INFO L226 Difference]: Without dead ends: 2257 [2021-06-05 07:04:11,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 194.1ms TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:04:11,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-06-05 07:04:11,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 1442. [2021-06-05 07:04:11,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.3587786259541983) internal successors, (4840), 1441 states have internal predecessors, (4840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:11,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4840 transitions. [2021-06-05 07:04:11,252 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4840 transitions. Word has length 27 [2021-06-05 07:04:11,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:11,252 INFO L482 AbstractCegarLoop]: Abstraction has 1442 states and 4840 transitions. [2021-06-05 07:04:11,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:11,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4840 transitions. [2021-06-05 07:04:11,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:11,254 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:11,254 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:11,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:11,455 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:11,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:11,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1264325580, now seen corresponding path program 8 times [2021-06-05 07:04:11,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:11,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644839016] [2021-06-05 07:04:11,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:11,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:11,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:11,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:11,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644839016] [2021-06-05 07:04:11,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644839016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:11,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775987423] [2021-06-05 07:04:11,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:11,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:04:11,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:11,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 07:04:11,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:11,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:04:11,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775987423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:11,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:11,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-06-05 07:04:11,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326202405] [2021-06-05 07:04:11,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:04:11,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:11,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:04:11,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:04:11,563 INFO L87 Difference]: Start difference. First operand 1442 states and 4840 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:11,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:11,716 INFO L93 Difference]: Finished difference Result 2263 states and 7241 transitions. [2021-06-05 07:04:11,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 07:04:11,716 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:11,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:11,720 INFO L225 Difference]: With dead ends: 2263 [2021-06-05 07:04:11,720 INFO L226 Difference]: Without dead ends: 2257 [2021-06-05 07:04:11,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:04:11,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-06-05 07:04:11,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 1535. [2021-06-05 07:04:11,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 3.3872229465449806) internal successors, (5196), 1534 states have internal predecessors, (5196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:11,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 5196 transitions. [2021-06-05 07:04:11,744 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 5196 transitions. Word has length 27 [2021-06-05 07:04:11,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:11,744 INFO L482 AbstractCegarLoop]: Abstraction has 1535 states and 5196 transitions. [2021-06-05 07:04:11,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:11,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 5196 transitions. [2021-06-05 07:04:11,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:11,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:11,747 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:11,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:11,955 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:11,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:11,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1995631268, now seen corresponding path program 9 times [2021-06-05 07:04:11,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:11,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904518359] [2021-06-05 07:04:11,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:11,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:11,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:11,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:11,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904518359] [2021-06-05 07:04:11,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904518359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:11,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159075067] [2021-06-05 07:04:11,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:12,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:04:12,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:12,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 07:04:12,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:12,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:04:12,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159075067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:12,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:12,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-06-05 07:04:12,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965303964] [2021-06-05 07:04:12,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:04:12,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:12,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:04:12,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:04:12,067 INFO L87 Difference]: Start difference. First operand 1535 states and 5196 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:12,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:12,211 INFO L93 Difference]: Finished difference Result 2415 states and 7685 transitions. [2021-06-05 07:04:12,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 07:04:12,211 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:12,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:12,214 INFO L225 Difference]: With dead ends: 2415 [2021-06-05 07:04:12,214 INFO L226 Difference]: Without dead ends: 2415 [2021-06-05 07:04:12,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:04:12,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-06-05 07:04:12,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1459. [2021-06-05 07:04:12,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1459 states, 1458 states have (on average 3.347736625514403) internal successors, (4881), 1458 states have internal predecessors, (4881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:12,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1459 states to 1459 states and 4881 transitions. [2021-06-05 07:04:12,236 INFO L78 Accepts]: Start accepts. Automaton has 1459 states and 4881 transitions. Word has length 27 [2021-06-05 07:04:12,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:12,236 INFO L482 AbstractCegarLoop]: Abstraction has 1459 states and 4881 transitions. [2021-06-05 07:04:12,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:12,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1459 states and 4881 transitions. [2021-06-05 07:04:12,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:12,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:12,238 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:12,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 07:04:12,438 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:12,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:12,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1854112532, now seen corresponding path program 10 times [2021-06-05 07:04:12,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:12,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241651300] [2021-06-05 07:04:12,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:12,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:12,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:12,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:12,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241651300] [2021-06-05 07:04:12,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241651300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:12,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252653208] [2021-06-05 07:04:12,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:12,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:04:12,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:12,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:12,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:12,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:04:12,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252653208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:12,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:12,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-06-05 07:04:12,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120129146] [2021-06-05 07:04:12,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:04:12,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:12,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:04:12,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:04:12,561 INFO L87 Difference]: Start difference. First operand 1459 states and 4881 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:12,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:12,797 INFO L93 Difference]: Finished difference Result 2204 states and 6862 transitions. [2021-06-05 07:04:12,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:04:12,797 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:12,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:12,800 INFO L225 Difference]: With dead ends: 2204 [2021-06-05 07:04:12,800 INFO L226 Difference]: Without dead ends: 2200 [2021-06-05 07:04:12,800 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 145.8ms TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:04:12,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2200 states. [2021-06-05 07:04:12,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2200 to 1419. [2021-06-05 07:04:12,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 3.349083215796897) internal successors, (4749), 1418 states have internal predecessors, (4749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:12,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4749 transitions. [2021-06-05 07:04:12,818 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4749 transitions. Word has length 27 [2021-06-05 07:04:12,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:12,819 INFO L482 AbstractCegarLoop]: Abstraction has 1419 states and 4749 transitions. [2021-06-05 07:04:12,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:12,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4749 transitions. [2021-06-05 07:04:12,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:12,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:12,821 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:13,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:13,021 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:13,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:13,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1856436888, now seen corresponding path program 11 times [2021-06-05 07:04:13,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:13,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114864284] [2021-06-05 07:04:13,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:13,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:13,052 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:13,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:13,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114864284] [2021-06-05 07:04:13,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114864284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:13,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354315486] [2021-06-05 07:04:13,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:13,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:04:13,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:13,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 07:04:13,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:13,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:13,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354315486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:13,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:13,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 07:04:13,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304802135] [2021-06-05 07:04:13,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:04:13,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:13,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:04:13,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:04:13,156 INFO L87 Difference]: Start difference. First operand 1419 states and 4749 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:13,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:13,324 INFO L93 Difference]: Finished difference Result 2022 states and 6496 transitions. [2021-06-05 07:04:13,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 07:04:13,324 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:13,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:13,327 INFO L225 Difference]: With dead ends: 2022 [2021-06-05 07:04:13,327 INFO L226 Difference]: Without dead ends: 2022 [2021-06-05 07:04:13,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 117.4ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:04:13,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-06-05 07:04:13,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1518. [2021-06-05 07:04:13,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 3.3698088332234675) internal successors, (5112), 1517 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:13,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 5112 transitions. [2021-06-05 07:04:13,360 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 5112 transitions. Word has length 27 [2021-06-05 07:04:13,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:13,360 INFO L482 AbstractCegarLoop]: Abstraction has 1518 states and 5112 transitions. [2021-06-05 07:04:13,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:13,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 5112 transitions. [2021-06-05 07:04:13,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:13,364 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:13,364 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:13,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-06-05 07:04:13,577 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:13,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:13,577 INFO L82 PathProgramCache]: Analyzing trace with hash 216767728, now seen corresponding path program 12 times [2021-06-05 07:04:13,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:13,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890963672] [2021-06-05 07:04:13,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:13,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:13,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:13,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:13,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890963672] [2021-06-05 07:04:13,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890963672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:13,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208729064] [2021-06-05 07:04:13,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:13,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:04:13,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:13,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:13,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:13,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:13,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208729064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:13,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:13,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 07:04:13,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885553603] [2021-06-05 07:04:13,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:04:13,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:13,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:04:13,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:04:13,726 INFO L87 Difference]: Start difference. First operand 1518 states and 5112 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:13,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:13,970 INFO L93 Difference]: Finished difference Result 2124 states and 6748 transitions. [2021-06-05 07:04:13,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:04:13,970 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:13,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:13,974 INFO L225 Difference]: With dead ends: 2124 [2021-06-05 07:04:13,974 INFO L226 Difference]: Without dead ends: 2112 [2021-06-05 07:04:13,974 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 153.2ms TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:04:13,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-06-05 07:04:13,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1536. [2021-06-05 07:04:13,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 3.3674267100977198) internal successors, (5169), 1535 states have internal predecessors, (5169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:14,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 5169 transitions. [2021-06-05 07:04:14,003 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 5169 transitions. Word has length 27 [2021-06-05 07:04:14,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:14,003 INFO L482 AbstractCegarLoop]: Abstraction has 1536 states and 5169 transitions. [2021-06-05 07:04:14,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:14,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 5169 transitions. [2021-06-05 07:04:14,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:14,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:14,006 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:14,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:14,221 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:14,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:14,221 INFO L82 PathProgramCache]: Analyzing trace with hash -670090772, now seen corresponding path program 4 times [2021-06-05 07:04:14,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:14,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408101207] [2021-06-05 07:04:14,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:14,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:14,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:14,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:14,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408101207] [2021-06-05 07:04:14,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408101207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:14,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035227125] [2021-06-05 07:04:14,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:14,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:04:14,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:14,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 07:04:14,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:14,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:14,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035227125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:14,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:14,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 07:04:14,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013356425] [2021-06-05 07:04:14,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:04:14,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:14,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:04:14,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:04:14,336 INFO L87 Difference]: Start difference. First operand 1536 states and 5169 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:14,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:14,588 INFO L93 Difference]: Finished difference Result 2332 states and 7312 transitions. [2021-06-05 07:04:14,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:04:14,589 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:14,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:14,591 INFO L225 Difference]: With dead ends: 2332 [2021-06-05 07:04:14,591 INFO L226 Difference]: Without dead ends: 2320 [2021-06-05 07:04:14,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 158.8ms TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:04:14,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-06-05 07:04:14,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1566. [2021-06-05 07:04:14,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 3.375079872204473) internal successors, (5282), 1565 states have internal predecessors, (5282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:14,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 5282 transitions. [2021-06-05 07:04:14,617 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 5282 transitions. Word has length 27 [2021-06-05 07:04:14,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:14,618 INFO L482 AbstractCegarLoop]: Abstraction has 1566 states and 5282 transitions. [2021-06-05 07:04:14,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:14,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 5282 transitions. [2021-06-05 07:04:14,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:14,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:14,621 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:14,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 07:04:14,837 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:14,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:14,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1401396460, now seen corresponding path program 5 times [2021-06-05 07:04:14,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:14,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467079954] [2021-06-05 07:04:14,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:14,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:14,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:14,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:14,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467079954] [2021-06-05 07:04:14,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467079954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:14,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286750372] [2021-06-05 07:04:14,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:14,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:04:14,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:14,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 07:04:14,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:14,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:14,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286750372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:14,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:14,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 07:04:14,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471897192] [2021-06-05 07:04:14,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:04:14,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:14,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:04:14,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:04:14,986 INFO L87 Difference]: Start difference. First operand 1566 states and 5282 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:15,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:15,251 INFO L93 Difference]: Finished difference Result 2490 states and 7823 transitions. [2021-06-05 07:04:15,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:04:15,251 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:15,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:15,254 INFO L225 Difference]: With dead ends: 2490 [2021-06-05 07:04:15,254 INFO L226 Difference]: Without dead ends: 2490 [2021-06-05 07:04:15,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 172.6ms TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:04:15,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2490 states. [2021-06-05 07:04:15,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2490 to 1435. [2021-06-05 07:04:15,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1435 states, 1434 states have (on average 3.311715481171548) internal successors, (4749), 1434 states have internal predecessors, (4749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:15,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 4749 transitions. [2021-06-05 07:04:15,278 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 4749 transitions. Word has length 27 [2021-06-05 07:04:15,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:15,278 INFO L482 AbstractCegarLoop]: Abstraction has 1435 states and 4749 transitions. [2021-06-05 07:04:15,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:15,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 4749 transitions. [2021-06-05 07:04:15,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:15,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:15,280 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:15,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 07:04:15,481 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:15,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:15,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1810785004, now seen corresponding path program 13 times [2021-06-05 07:04:15,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:15,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383562929] [2021-06-05 07:04:15,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:15,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:15,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:15,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:15,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383562929] [2021-06-05 07:04:15,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383562929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:15,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452800679] [2021-06-05 07:04:15,517 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:15,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:15,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:15,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452800679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:15,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:15,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 07:04:15,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15492133] [2021-06-05 07:04:15,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:04:15,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:15,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:04:15,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:04:15,610 INFO L87 Difference]: Start difference. First operand 1435 states and 4749 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:15,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:15,899 INFO L93 Difference]: Finished difference Result 2497 states and 7799 transitions. [2021-06-05 07:04:15,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:04:15,900 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:15,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:15,903 INFO L225 Difference]: With dead ends: 2497 [2021-06-05 07:04:15,903 INFO L226 Difference]: Without dead ends: 2497 [2021-06-05 07:04:15,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 170.7ms TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:04:15,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-06-05 07:04:15,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1477. [2021-06-05 07:04:15,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 3.2981029810298104) internal successors, (4868), 1476 states have internal predecessors, (4868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:15,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 4868 transitions. [2021-06-05 07:04:15,927 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 4868 transitions. Word has length 27 [2021-06-05 07:04:15,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:15,927 INFO L482 AbstractCegarLoop]: Abstraction has 1477 states and 4868 transitions. [2021-06-05 07:04:15,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:15,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 4868 transitions. [2021-06-05 07:04:15,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:15,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:15,930 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:16,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 07:04:16,146 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:16,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:16,147 INFO L82 PathProgramCache]: Analyzing trace with hash -168744536, now seen corresponding path program 14 times [2021-06-05 07:04:16,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:16,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016889574] [2021-06-05 07:04:16,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:16,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:16,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:16,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016889574] [2021-06-05 07:04:16,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016889574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:16,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588224666] [2021-06-05 07:04:16,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:16,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:04:16,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:16,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:16,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:16,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:16,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588224666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:16,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:16,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 07:04:16,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328133340] [2021-06-05 07:04:16,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:04:16,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:16,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:04:16,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:04:16,312 INFO L87 Difference]: Start difference. First operand 1477 states and 4868 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:16,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:16,919 INFO L93 Difference]: Finished difference Result 2724 states and 8387 transitions. [2021-06-05 07:04:16,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:04:16,919 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:16,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:16,923 INFO L225 Difference]: With dead ends: 2724 [2021-06-05 07:04:16,923 INFO L226 Difference]: Without dead ends: 2724 [2021-06-05 07:04:16,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 426.2ms TimeCoverageRelationStatistics Valid=412, Invalid=1394, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:04:16,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2021-06-05 07:04:16,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 1533. [2021-06-05 07:04:16,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1532 states have (on average 3.3015665796344646) internal successors, (5058), 1532 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:16,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 5058 transitions. [2021-06-05 07:04:16,948 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 5058 transitions. Word has length 27 [2021-06-05 07:04:16,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:16,948 INFO L482 AbstractCegarLoop]: Abstraction has 1533 states and 5058 transitions. [2021-06-05 07:04:16,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:16,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 5058 transitions. [2021-06-05 07:04:16,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:16,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:16,951 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:17,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 07:04:17,151 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:17,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:17,152 INFO L82 PathProgramCache]: Analyzing trace with hash 563716900, now seen corresponding path program 15 times [2021-06-05 07:04:17,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:17,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605949868] [2021-06-05 07:04:17,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:17,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:17,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:17,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:17,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605949868] [2021-06-05 07:04:17,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605949868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:17,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806224854] [2021-06-05 07:04:17,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:17,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:04:17,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:17,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:17,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:17,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:17,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806224854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:17,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:17,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 07:04:17,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842355511] [2021-06-05 07:04:17,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:04:17,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:17,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:04:17,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:04:17,286 INFO L87 Difference]: Start difference. First operand 1533 states and 5058 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:17,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:17,706 INFO L93 Difference]: Finished difference Result 2582 states and 8017 transitions. [2021-06-05 07:04:17,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:04:17,706 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:17,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:17,709 INFO L225 Difference]: With dead ends: 2582 [2021-06-05 07:04:17,709 INFO L226 Difference]: Without dead ends: 2578 [2021-06-05 07:04:17,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 258.4ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:04:17,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2021-06-05 07:04:17,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 1487. [2021-06-05 07:04:17,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 3.2994616419919245) internal successors, (4903), 1486 states have internal predecessors, (4903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:17,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4903 transitions. [2021-06-05 07:04:17,733 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4903 transitions. Word has length 27 [2021-06-05 07:04:17,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:17,733 INFO L482 AbstractCegarLoop]: Abstraction has 1487 states and 4903 transitions. [2021-06-05 07:04:17,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:17,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4903 transitions. [2021-06-05 07:04:17,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:17,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:17,736 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:17,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:17,937 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:17,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:17,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1088595216, now seen corresponding path program 16 times [2021-06-05 07:04:17,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:17,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971790940] [2021-06-05 07:04:17,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:17,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:17,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:17,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:17,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971790940] [2021-06-05 07:04:17,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971790940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:17,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215288903] [2021-06-05 07:04:17,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:17,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:04:17,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:17,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:17,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:18,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:18,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215288903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:18,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:18,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 07:04:18,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175041201] [2021-06-05 07:04:18,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:04:18,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:18,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:04:18,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:04:18,072 INFO L87 Difference]: Start difference. First operand 1487 states and 4903 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:18,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:18,403 INFO L93 Difference]: Finished difference Result 2411 states and 7586 transitions. [2021-06-05 07:04:18,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:04:18,403 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:18,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:18,406 INFO L225 Difference]: With dead ends: 2411 [2021-06-05 07:04:18,406 INFO L226 Difference]: Without dead ends: 2411 [2021-06-05 07:04:18,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 198.7ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:04:18,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2021-06-05 07:04:18,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 1471. [2021-06-05 07:04:18,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 3.3081632653061224) internal successors, (4863), 1470 states have internal predecessors, (4863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:18,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 4863 transitions. [2021-06-05 07:04:18,428 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 4863 transitions. Word has length 27 [2021-06-05 07:04:18,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:18,428 INFO L482 AbstractCegarLoop]: Abstraction has 1471 states and 4863 transitions. [2021-06-05 07:04:18,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:18,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 4863 transitions. [2021-06-05 07:04:18,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:18,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:18,430 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:18,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 07:04:18,631 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:18,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:18,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1331852852, now seen corresponding path program 6 times [2021-06-05 07:04:18,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:18,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184902505] [2021-06-05 07:04:18,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:18,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:18,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:18,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:18,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184902505] [2021-06-05 07:04:18,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184902505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:18,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104058956] [2021-06-05 07:04:18,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:18,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 07:04:18,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:18,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 07:04:18,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:18,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:18,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104058956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:18,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:18,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 07:04:18,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957522057] [2021-06-05 07:04:18,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:04:18,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:18,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:04:18,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:04:18,766 INFO L87 Difference]: Start difference. First operand 1471 states and 4863 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:19,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:19,017 INFO L93 Difference]: Finished difference Result 1987 states and 6138 transitions. [2021-06-05 07:04:19,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 07:04:19,017 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:19,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:19,021 INFO L225 Difference]: With dead ends: 1987 [2021-06-05 07:04:19,021 INFO L226 Difference]: Without dead ends: 1975 [2021-06-05 07:04:19,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 156.9ms TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:04:19,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2021-06-05 07:04:19,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1462. [2021-06-05 07:04:19,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1461 states have (on average 3.308008213552361) internal successors, (4833), 1461 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:19,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 4833 transitions. [2021-06-05 07:04:19,052 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 4833 transitions. Word has length 27 [2021-06-05 07:04:19,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:19,052 INFO L482 AbstractCegarLoop]: Abstraction has 1462 states and 4833 transitions. [2021-06-05 07:04:19,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:19,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 4833 transitions. [2021-06-05 07:04:19,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:19,055 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:19,055 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:19,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 07:04:19,279 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:19,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:19,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1010707988, now seen corresponding path program 7 times [2021-06-05 07:04:19,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:19,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053184382] [2021-06-05 07:04:19,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:19,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:19,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:19,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053184382] [2021-06-05 07:04:19,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053184382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:19,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396490405] [2021-06-05 07:04:19,309 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:19,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 07:04:19,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:19,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:19,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396490405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:19,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:19,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 07:04:19,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445235873] [2021-06-05 07:04:19,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:04:19,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:19,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:04:19,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:04:19,434 INFO L87 Difference]: Start difference. First operand 1462 states and 4833 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:19,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:19,647 INFO L93 Difference]: Finished difference Result 1951 states and 6027 transitions. [2021-06-05 07:04:19,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 07:04:19,647 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:19,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:19,650 INFO L225 Difference]: With dead ends: 1951 [2021-06-05 07:04:19,650 INFO L226 Difference]: Without dead ends: 1923 [2021-06-05 07:04:19,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 139.7ms TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:04:19,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2021-06-05 07:04:19,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1463. [2021-06-05 07:04:19,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1462 states have (on average 3.3071135430916554) internal successors, (4835), 1462 states have internal predecessors, (4835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:19,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 4835 transitions. [2021-06-05 07:04:19,671 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 4835 transitions. Word has length 27 [2021-06-05 07:04:19,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:19,671 INFO L482 AbstractCegarLoop]: Abstraction has 1463 states and 4835 transitions. [2021-06-05 07:04:19,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:19,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 4835 transitions. [2021-06-05 07:04:19,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:19,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:19,673 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:19,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:19,874 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:19,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:19,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1924122076, now seen corresponding path program 8 times [2021-06-05 07:04:19,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:19,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694077681] [2021-06-05 07:04:19,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:19,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:19,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:19,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:19,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694077681] [2021-06-05 07:04:19,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694077681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:19,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461471562] [2021-06-05 07:04:19,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:19,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:04:19,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:19,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 07:04:19,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:19,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:19,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461471562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:19,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:19,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 07:04:19,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200649805] [2021-06-05 07:04:19,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:04:19,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:19,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:04:19,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:04:19,990 INFO L87 Difference]: Start difference. First operand 1463 states and 4835 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:20,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:20,205 INFO L93 Difference]: Finished difference Result 2417 states and 7513 transitions. [2021-06-05 07:04:20,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 07:04:20,205 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:20,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:20,209 INFO L225 Difference]: With dead ends: 2417 [2021-06-05 07:04:20,209 INFO L226 Difference]: Without dead ends: 2417 [2021-06-05 07:04:20,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 119.0ms TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:04:20,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-06-05 07:04:20,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1487. [2021-06-05 07:04:20,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 3.3250336473755047) internal successors, (4941), 1486 states have internal predecessors, (4941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:20,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4941 transitions. [2021-06-05 07:04:20,243 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4941 transitions. Word has length 27 [2021-06-05 07:04:20,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:20,243 INFO L482 AbstractCegarLoop]: Abstraction has 1487 states and 4941 transitions. [2021-06-05 07:04:20,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:20,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4941 transitions. [2021-06-05 07:04:20,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:20,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:20,246 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:20,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:20,469 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:20,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:20,469 INFO L82 PathProgramCache]: Analyzing trace with hash -782245740, now seen corresponding path program 9 times [2021-06-05 07:04:20,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:20,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658536559] [2021-06-05 07:04:20,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:20,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:20,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:20,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658536559] [2021-06-05 07:04:20,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658536559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:20,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167919263] [2021-06-05 07:04:20,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:20,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:04:20,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:20,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 07:04:20,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:20,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:20,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167919263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:20,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:20,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 07:04:20,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179216726] [2021-06-05 07:04:20,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:04:20,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:20,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:04:20,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:04:20,581 INFO L87 Difference]: Start difference. First operand 1487 states and 4941 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:20,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:20,774 INFO L93 Difference]: Finished difference Result 2191 states and 6835 transitions. [2021-06-05 07:04:20,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 07:04:20,775 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:20,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:20,777 INFO L225 Difference]: With dead ends: 2191 [2021-06-05 07:04:20,777 INFO L226 Difference]: Without dead ends: 2170 [2021-06-05 07:04:20,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 114.3ms TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:04:20,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-06-05 07:04:20,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1487. [2021-06-05 07:04:20,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 3.319650067294751) internal successors, (4933), 1486 states have internal predecessors, (4933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:20,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4933 transitions. [2021-06-05 07:04:20,797 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4933 transitions. Word has length 27 [2021-06-05 07:04:20,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:20,797 INFO L482 AbstractCegarLoop]: Abstraction has 1487 states and 4933 transitions. [2021-06-05 07:04:20,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:20,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4933 transitions. [2021-06-05 07:04:20,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:20,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:20,799 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:20,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:20,999 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:20,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:21,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1171437904, now seen corresponding path program 10 times [2021-06-05 07:04:21,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:21,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583149135] [2021-06-05 07:04:21,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:21,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:21,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:21,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:21,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583149135] [2021-06-05 07:04:21,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583149135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:21,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246955678] [2021-06-05 07:04:21,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:21,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:04:21,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:21,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 07:04:21,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:21,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:21,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246955678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:21,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:21,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 07:04:21,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578760933] [2021-06-05 07:04:21,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:04:21,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:21,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:04:21,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:04:21,123 INFO L87 Difference]: Start difference. First operand 1487 states and 4933 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:21,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:21,273 INFO L93 Difference]: Finished difference Result 1790 states and 5786 transitions. [2021-06-05 07:04:21,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 07:04:21,273 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:21,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:21,276 INFO L225 Difference]: With dead ends: 1790 [2021-06-05 07:04:21,276 INFO L226 Difference]: Without dead ends: 1790 [2021-06-05 07:04:21,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 104.1ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:04:21,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-06-05 07:04:21,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1467. [2021-06-05 07:04:21,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1466 states have (on average 3.319918144611187) internal successors, (4867), 1466 states have internal predecessors, (4867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:21,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 4867 transitions. [2021-06-05 07:04:21,293 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 4867 transitions. Word has length 27 [2021-06-05 07:04:21,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:21,293 INFO L482 AbstractCegarLoop]: Abstraction has 1467 states and 4867 transitions. [2021-06-05 07:04:21,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:21,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 4867 transitions. [2021-06-05 07:04:21,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:21,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:21,295 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:21,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-06-05 07:04:21,496 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:21,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:21,496 INFO L82 PathProgramCache]: Analyzing trace with hash -2112049896, now seen corresponding path program 11 times [2021-06-05 07:04:21,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:21,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035607991] [2021-06-05 07:04:21,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:21,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:21,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:21,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:21,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035607991] [2021-06-05 07:04:21,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035607991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:21,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585948825] [2021-06-05 07:04:21,525 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:21,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:04:21,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:21,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 07:04:21,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:21,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:21,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585948825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:21,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:21,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 07:04:21,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466457557] [2021-06-05 07:04:21,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:04:21,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:21,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:04:21,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:04:21,603 INFO L87 Difference]: Start difference. First operand 1467 states and 4867 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:21,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:21,771 INFO L93 Difference]: Finished difference Result 2556 states and 8173 transitions. [2021-06-05 07:04:21,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 07:04:21,782 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:21,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:21,786 INFO L225 Difference]: With dead ends: 2556 [2021-06-05 07:04:21,786 INFO L226 Difference]: Without dead ends: 2556 [2021-06-05 07:04:21,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:04:21,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-06-05 07:04:21,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 1719. [2021-06-05 07:04:21,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 3.3963911525029102) internal successors, (5835), 1718 states have internal predecessors, (5835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:21,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 5835 transitions. [2021-06-05 07:04:21,819 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 5835 transitions. Word has length 27 [2021-06-05 07:04:21,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:21,819 INFO L482 AbstractCegarLoop]: Abstraction has 1719 states and 5835 transitions. [2021-06-05 07:04:21,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:21,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 5835 transitions. [2021-06-05 07:04:21,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:21,822 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:21,822 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:22,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 07:04:22,041 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:22,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:22,041 INFO L82 PathProgramCache]: Analyzing trace with hash -523450416, now seen corresponding path program 12 times [2021-06-05 07:04:22,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:22,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730262695] [2021-06-05 07:04:22,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:22,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:22,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:22,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:22,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730262695] [2021-06-05 07:04:22,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730262695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:22,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186894816] [2021-06-05 07:04:22,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:22,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 07:04:22,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:22,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 07:04:22,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:22,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:22,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186894816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:22,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:22,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 07:04:22,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362975446] [2021-06-05 07:04:22,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:04:22,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:22,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:04:22,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:04:22,168 INFO L87 Difference]: Start difference. First operand 1719 states and 5835 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:22,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:22,353 INFO L93 Difference]: Finished difference Result 2232 states and 7209 transitions. [2021-06-05 07:04:22,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 07:04:22,354 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:22,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:22,357 INFO L225 Difference]: With dead ends: 2232 [2021-06-05 07:04:22,357 INFO L226 Difference]: Without dead ends: 2211 [2021-06-05 07:04:22,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:04:22,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-06-05 07:04:22,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 1686. [2021-06-05 07:04:22,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 3.399406528189911) internal successors, (5728), 1685 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:22,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 5728 transitions. [2021-06-05 07:04:22,383 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 5728 transitions. Word has length 27 [2021-06-05 07:04:22,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:22,383 INFO L482 AbstractCegarLoop]: Abstraction has 1686 states and 5728 transitions. [2021-06-05 07:04:22,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:22,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 5728 transitions. [2021-06-05 07:04:22,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:22,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:22,385 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:22,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 07:04:22,586 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:22,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:22,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1318431600, now seen corresponding path program 17 times [2021-06-05 07:04:22,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:22,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499456400] [2021-06-05 07:04:22,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:22,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:22,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:22,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:22,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499456400] [2021-06-05 07:04:22,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499456400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:22,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203490195] [2021-06-05 07:04:22,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:22,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:04:22,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:22,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:22,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:22,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:22,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203490195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:22,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:22,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 07:04:22,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480465220] [2021-06-05 07:04:22,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:04:22,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:22,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:04:22,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:04:22,719 INFO L87 Difference]: Start difference. First operand 1686 states and 5728 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:23,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:23,274 INFO L93 Difference]: Finished difference Result 3478 states and 10820 transitions. [2021-06-05 07:04:23,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 07:04:23,274 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:23,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:23,279 INFO L225 Difference]: With dead ends: 3478 [2021-06-05 07:04:23,279 INFO L226 Difference]: Without dead ends: 3478 [2021-06-05 07:04:23,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 348.3ms TimeCoverageRelationStatistics Valid=445, Invalid=1535, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:04:23,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2021-06-05 07:04:23,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 1866. [2021-06-05 07:04:23,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1865 states have (on average 3.4428954423592493) internal successors, (6421), 1865 states have internal predecessors, (6421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:23,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 6421 transitions. [2021-06-05 07:04:23,334 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 6421 transitions. Word has length 27 [2021-06-05 07:04:23,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:23,334 INFO L482 AbstractCegarLoop]: Abstraction has 1866 states and 6421 transitions. [2021-06-05 07:04:23,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:23,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 6421 transitions. [2021-06-05 07:04:23,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:23,337 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:23,338 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:23,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 07:04:23,561 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:23,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:23,562 INFO L82 PathProgramCache]: Analyzing trace with hash 2050893036, now seen corresponding path program 18 times [2021-06-05 07:04:23,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:23,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211090347] [2021-06-05 07:04:23,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:23,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:23,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:23,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:23,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211090347] [2021-06-05 07:04:23,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211090347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:23,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033164180] [2021-06-05 07:04:23,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:23,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:04:23,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:23,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:23,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:23,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:23,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033164180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:23,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:23,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 07:04:23,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42896047] [2021-06-05 07:04:23,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:04:23,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:23,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:04:23,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:04:23,695 INFO L87 Difference]: Start difference. First operand 1866 states and 6421 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:24,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:24,163 INFO L93 Difference]: Finished difference Result 3323 states and 10443 transitions. [2021-06-05 07:04:24,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 07:04:24,163 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:24,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:24,168 INFO L225 Difference]: With dead ends: 3323 [2021-06-05 07:04:24,168 INFO L226 Difference]: Without dead ends: 3319 [2021-06-05 07:04:24,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 286.5ms TimeCoverageRelationStatistics Valid=313, Invalid=1093, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 07:04:24,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3319 states. [2021-06-05 07:04:24,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3319 to 1834. [2021-06-05 07:04:24,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1834 states, 1833 states have (on average 3.4451718494271684) internal successors, (6315), 1833 states have internal predecessors, (6315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:24,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1834 states to 1834 states and 6315 transitions. [2021-06-05 07:04:24,199 INFO L78 Accepts]: Start accepts. Automaton has 1834 states and 6315 transitions. Word has length 27 [2021-06-05 07:04:24,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:24,199 INFO L482 AbstractCegarLoop]: Abstraction has 1834 states and 6315 transitions. [2021-06-05 07:04:24,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:24,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1834 states and 6315 transitions. [2021-06-05 07:04:24,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:24,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:24,202 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:24,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 07:04:24,403 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:24,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:24,403 INFO L82 PathProgramCache]: Analyzing trace with hash -173194000, now seen corresponding path program 19 times [2021-06-05 07:04:24,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:24,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786652991] [2021-06-05 07:04:24,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:24,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:24,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:24,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786652991] [2021-06-05 07:04:24,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786652991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:24,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268770504] [2021-06-05 07:04:24,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:24,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:24,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:24,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:24,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:24,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268770504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:24,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:24,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 07:04:24,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747798147] [2021-06-05 07:04:24,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:04:24,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:24,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:04:24,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:04:24,531 INFO L87 Difference]: Start difference. First operand 1834 states and 6315 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:24,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:24,959 INFO L93 Difference]: Finished difference Result 3041 states and 9730 transitions. [2021-06-05 07:04:24,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:04:24,959 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:24,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:24,963 INFO L225 Difference]: With dead ends: 3041 [2021-06-05 07:04:24,963 INFO L226 Difference]: Without dead ends: 3029 [2021-06-05 07:04:24,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 278.9ms TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:04:24,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3029 states. [2021-06-05 07:04:24,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3029 to 1816. [2021-06-05 07:04:24,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 3.4512396694214877) internal successors, (6264), 1815 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:24,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 6264 transitions. [2021-06-05 07:04:24,993 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 6264 transitions. Word has length 27 [2021-06-05 07:04:24,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:24,993 INFO L482 AbstractCegarLoop]: Abstraction has 1816 states and 6264 transitions. [2021-06-05 07:04:24,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:24,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 6264 transitions. [2021-06-05 07:04:24,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:24,996 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:24,996 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:25,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:25,196 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:25,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:25,197 INFO L82 PathProgramCache]: Analyzing trace with hash 2106791024, now seen corresponding path program 20 times [2021-06-05 07:04:25,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:25,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235949977] [2021-06-05 07:04:25,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:25,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:25,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:25,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235949977] [2021-06-05 07:04:25,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235949977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:25,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147700801] [2021-06-05 07:04:25,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:25,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:04:25,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:25,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:25,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:25,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:04:25,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147700801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:25,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:25,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-06-05 07:04:25,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32156753] [2021-06-05 07:04:25,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:04:25,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:25,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:04:25,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:04:25,323 INFO L87 Difference]: Start difference. First operand 1816 states and 6264 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:25,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:25,819 INFO L93 Difference]: Finished difference Result 4165 states and 13261 transitions. [2021-06-05 07:04:25,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 07:04:25,819 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:25,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:25,825 INFO L225 Difference]: With dead ends: 4165 [2021-06-05 07:04:25,825 INFO L226 Difference]: Without dead ends: 4165 [2021-06-05 07:04:25,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 307.2ms TimeCoverageRelationStatistics Valid=451, Invalid=1355, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:04:25,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4165 states. [2021-06-05 07:04:25,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4165 to 2008. [2021-06-05 07:04:25,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 3.5366218236173395) internal successors, (7098), 2007 states have internal predecessors, (7098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:25,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 7098 transitions. [2021-06-05 07:04:25,862 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 7098 transitions. Word has length 27 [2021-06-05 07:04:25,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:25,862 INFO L482 AbstractCegarLoop]: Abstraction has 2008 states and 7098 transitions. [2021-06-05 07:04:25,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:25,862 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 7098 transitions. [2021-06-05 07:04:25,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:25,865 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:25,865 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:26,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-05 07:04:26,065 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:26,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:26,066 INFO L82 PathProgramCache]: Analyzing trace with hash -729353744, now seen corresponding path program 21 times [2021-06-05 07:04:26,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:26,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922482002] [2021-06-05 07:04:26,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:26,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:26,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:26,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:26,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922482002] [2021-06-05 07:04:26,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922482002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:26,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312977888] [2021-06-05 07:04:26,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:26,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:04:26,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:26,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:26,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:26,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:04:26,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312977888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:26,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:26,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-06-05 07:04:26,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293585246] [2021-06-05 07:04:26,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:04:26,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:26,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:04:26,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:04:26,192 INFO L87 Difference]: Start difference. First operand 2008 states and 7098 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:26,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:26,726 INFO L93 Difference]: Finished difference Result 4184 states and 13322 transitions. [2021-06-05 07:04:26,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 07:04:26,726 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:26,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:26,731 INFO L225 Difference]: With dead ends: 4184 [2021-06-05 07:04:26,731 INFO L226 Difference]: Without dead ends: 4184 [2021-06-05 07:04:26,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 334.0ms TimeCoverageRelationStatistics Valid=451, Invalid=1355, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:04:26,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4184 states. [2021-06-05 07:04:26,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4184 to 2009. [2021-06-05 07:04:26,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 2008 states have (on average 3.5328685258964145) internal successors, (7094), 2008 states have internal predecessors, (7094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:26,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 7094 transitions. [2021-06-05 07:04:26,769 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 7094 transitions. Word has length 27 [2021-06-05 07:04:26,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:26,770 INFO L482 AbstractCegarLoop]: Abstraction has 2009 states and 7094 transitions. [2021-06-05 07:04:26,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:26,770 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 7094 transitions. [2021-06-05 07:04:26,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:26,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:26,772 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:26,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 07:04:26,973 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:26,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:26,973 INFO L82 PathProgramCache]: Analyzing trace with hash 21775592, now seen corresponding path program 22 times [2021-06-05 07:04:26,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:26,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366995483] [2021-06-05 07:04:26,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:26,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:27,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:27,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:27,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366995483] [2021-06-05 07:04:27,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366995483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:27,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013679685] [2021-06-05 07:04:27,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:27,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:04:27,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:27,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:27,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:27,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:04:27,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013679685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:27,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:27,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 07:04:27,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17057081] [2021-06-05 07:04:27,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:04:27,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:27,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:04:27,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:04:27,124 INFO L87 Difference]: Start difference. First operand 2009 states and 7094 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:27,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:27,530 INFO L93 Difference]: Finished difference Result 3911 states and 12446 transitions. [2021-06-05 07:04:27,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:04:27,530 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:27,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:27,536 INFO L225 Difference]: With dead ends: 3911 [2021-06-05 07:04:27,536 INFO L226 Difference]: Without dead ends: 3907 [2021-06-05 07:04:27,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 221.9ms TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 07:04:27,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2021-06-05 07:04:27,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 2031. [2021-06-05 07:04:27,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2030 states have (on average 3.531527093596059) internal successors, (7169), 2030 states have internal predecessors, (7169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:27,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 7169 transitions. [2021-06-05 07:04:27,570 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 7169 transitions. Word has length 27 [2021-06-05 07:04:27,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:27,570 INFO L482 AbstractCegarLoop]: Abstraction has 2031 states and 7169 transitions. [2021-06-05 07:04:27,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:27,570 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 7169 transitions. [2021-06-05 07:04:27,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:27,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:27,573 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:27,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 07:04:27,775 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:27,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:27,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1000333036, now seen corresponding path program 23 times [2021-06-05 07:04:27,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:27,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410259727] [2021-06-05 07:04:27,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:27,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:27,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:27,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:27,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410259727] [2021-06-05 07:04:27,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410259727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:27,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182206212] [2021-06-05 07:04:27,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:27,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:04:27,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:27,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:27,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:27,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:04:27,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182206212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:27,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:27,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 07:04:27,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558281764] [2021-06-05 07:04:27,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:04:27,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:27,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:04:27,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:04:27,937 INFO L87 Difference]: Start difference. First operand 2031 states and 7169 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:28,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:28,388 INFO L93 Difference]: Finished difference Result 4058 states and 12788 transitions. [2021-06-05 07:04:28,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 07:04:28,388 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:28,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:28,394 INFO L225 Difference]: With dead ends: 4058 [2021-06-05 07:04:28,394 INFO L226 Difference]: Without dead ends: 4058 [2021-06-05 07:04:28,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 261.3ms TimeCoverageRelationStatistics Valid=345, Invalid=1061, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 07:04:28,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4058 states. [2021-06-05 07:04:28,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4058 to 2015. [2021-06-05 07:04:28,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 3.5307845084409135) internal successors, (7111), 2014 states have internal predecessors, (7111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:28,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 7111 transitions. [2021-06-05 07:04:28,430 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 7111 transitions. Word has length 27 [2021-06-05 07:04:28,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:28,430 INFO L482 AbstractCegarLoop]: Abstraction has 2015 states and 7111 transitions. [2021-06-05 07:04:28,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:28,431 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 7111 transitions. [2021-06-05 07:04:28,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:28,433 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:28,433 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:28,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:28,637 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:28,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:28,638 INFO L82 PathProgramCache]: Analyzing trace with hash 646145264, now seen corresponding path program 24 times [2021-06-05 07:04:28,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:28,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596654363] [2021-06-05 07:04:28,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:28,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:28,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:28,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:28,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596654363] [2021-06-05 07:04:28,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596654363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:28,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028013482] [2021-06-05 07:04:28,671 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:28,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:04:28,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:28,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:28,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:28,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:28,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028013482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:28,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:28,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:04:28,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625987927] [2021-06-05 07:04:28,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:04:28,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:28,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:04:28,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:04:28,756 INFO L87 Difference]: Start difference. First operand 2015 states and 7111 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:29,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:29,077 INFO L93 Difference]: Finished difference Result 3346 states and 10911 transitions. [2021-06-05 07:04:29,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:04:29,077 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:29,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:29,081 INFO L225 Difference]: With dead ends: 3346 [2021-06-05 07:04:29,081 INFO L226 Difference]: Without dead ends: 3334 [2021-06-05 07:04:29,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 184.6ms TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:04:29,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3334 states. [2021-06-05 07:04:29,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3334 to 2049. [2021-06-05 07:04:29,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 3.5244140625) internal successors, (7218), 2048 states have internal predecessors, (7218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:29,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 7218 transitions. [2021-06-05 07:04:29,124 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 7218 transitions. Word has length 27 [2021-06-05 07:04:29,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:29,125 INFO L482 AbstractCegarLoop]: Abstraction has 2049 states and 7218 transitions. [2021-06-05 07:04:29,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:29,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 7218 transitions. [2021-06-05 07:04:29,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:29,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:29,127 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:29,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:29,328 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:29,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:29,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1567847404, now seen corresponding path program 25 times [2021-06-05 07:04:29,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:29,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732356273] [2021-06-05 07:04:29,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:29,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:29,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:29,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:29,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732356273] [2021-06-05 07:04:29,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732356273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:29,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981000681] [2021-06-05 07:04:29,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:29,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:29,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:29,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:29,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:29,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981000681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:29,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:29,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:04:29,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13961483] [2021-06-05 07:04:29,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:04:29,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:29,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:04:29,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:04:29,434 INFO L87 Difference]: Start difference. First operand 2049 states and 7218 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:29,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:29,857 INFO L93 Difference]: Finished difference Result 3635 states and 11672 transitions. [2021-06-05 07:04:29,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:04:29,857 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:29,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:29,862 INFO L225 Difference]: With dead ends: 3635 [2021-06-05 07:04:29,862 INFO L226 Difference]: Without dead ends: 3631 [2021-06-05 07:04:29,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 252.5ms TimeCoverageRelationStatistics Valid=279, Invalid=981, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:04:29,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3631 states. [2021-06-05 07:04:29,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3631 to 2132. [2021-06-05 07:04:29,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2132 states, 2131 states have (on average 3.5152510558423273) internal successors, (7491), 2131 states have internal predecessors, (7491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:29,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 7491 transitions. [2021-06-05 07:04:29,897 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 7491 transitions. Word has length 27 [2021-06-05 07:04:29,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:29,897 INFO L482 AbstractCegarLoop]: Abstraction has 2132 states and 7491 transitions. [2021-06-05 07:04:29,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:29,897 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 7491 transitions. [2021-06-05 07:04:29,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:04:29,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:29,900 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:30,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:30,100 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:30,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:30,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1748562448, now seen corresponding path program 26 times [2021-06-05 07:04:30,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:30,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936553907] [2021-06-05 07:04:30,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:30,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:30,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:30,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:30,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936553907] [2021-06-05 07:04:30,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936553907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:30,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908537313] [2021-06-05 07:04:30,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:30,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:04:30,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:30,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:30,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:30,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:30,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908537313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:30,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:30,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:04:30,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087083725] [2021-06-05 07:04:30,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:04:30,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:30,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:04:30,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:04:30,250 INFO L87 Difference]: Start difference. First operand 2132 states and 7491 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:30,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:30,737 INFO L93 Difference]: Finished difference Result 3810 states and 12119 transitions. [2021-06-05 07:04:30,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 07:04:30,737 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:04:30,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:30,742 INFO L225 Difference]: With dead ends: 3810 [2021-06-05 07:04:30,742 INFO L226 Difference]: Without dead ends: 3810 [2021-06-05 07:04:30,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 288.9ms TimeCoverageRelationStatistics Valid=392, Invalid=1330, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 07:04:30,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3810 states. [2021-06-05 07:04:30,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3810 to 2086. [2021-06-05 07:04:30,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2086 states, 2085 states have (on average 3.51462829736211) internal successors, (7328), 2085 states have internal predecessors, (7328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:30,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 7328 transitions. [2021-06-05 07:04:30,773 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 7328 transitions. Word has length 27 [2021-06-05 07:04:30,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:30,774 INFO L482 AbstractCegarLoop]: Abstraction has 2086 states and 7328 transitions. [2021-06-05 07:04:30,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:30,774 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 7328 transitions. [2021-06-05 07:04:30,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 07:04:30,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:30,776 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:30,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 07:04:30,979 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:30,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:30,979 INFO L82 PathProgramCache]: Analyzing trace with hash -2115287982, now seen corresponding path program 29 times [2021-06-05 07:04:30,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:30,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191015755] [2021-06-05 07:04:30,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:30,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:31,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:31,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:31,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191015755] [2021-06-05 07:04:31,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191015755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:31,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174500250] [2021-06-05 07:04:31,627 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:31,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:04:31,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:31,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 07:04:31,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:02,492 WARN L205 SmtUtils]: Spent 30.36 s on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-06-05 07:05:02,835 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_15], 7=[A, v_prenex_25, v_prenex_17], 9=[v_prenex_23], 12=[v_prenex_19, v_prenex_21, v_prenex_20, v_prenex_14, v_prenex_13]} [2021-06-05 07:05:02,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:02,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:02,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:02,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2021-06-05 07:05:02,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:03,083 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 07:05:03,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:03,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:03,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:03,129 INFO L354 Elim1Store]: treesize reduction 26, result has 44.7 percent of original size [2021-06-05 07:05:03,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 30 [2021-06-05 07:05:03,132 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:03,329 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2021-06-05 07:05:03,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:03,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:03,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:03,379 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:03,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 56 [2021-06-05 07:05:03,414 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:03,611 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-06-05 07:05:03,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:03,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:03,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:03,669 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-06-05 07:05:03,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 44 [2021-06-05 07:05:03,680 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:03,855 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-06-05 07:05:03,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:03,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:03,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:03,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:03,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:03,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:03,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:03,892 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 07:05:03,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 26 [2021-06-05 07:05:03,894 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:04,047 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-06-05 07:05:04,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:04,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:04,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:04,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:04,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:04,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:04,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:04,106 INFO L354 Elim1Store]: treesize reduction 12, result has 78.9 percent of original size [2021-06-05 07:05:04,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 57 [2021-06-05 07:05:04,134 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:04,279 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-06-05 07:05:04,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:04,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:04,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:04,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:04,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:04,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:04,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:04,318 INFO L354 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2021-06-05 07:05:04,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 35 [2021-06-05 07:05:04,320 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:04,439 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-05 07:05:04,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:04,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:04,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:04,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:04,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:04,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:04,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:04,474 INFO L354 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2021-06-05 07:05:04,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 35 [2021-06-05 07:05:04,477 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:04,604 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-05 07:05:04,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:04,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:04,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:04,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:04,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:04,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:04,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:04,651 INFO L354 Elim1Store]: treesize reduction 22, result has 61.4 percent of original size [2021-06-05 07:05:04,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 47 [2021-06-05 07:05:04,664 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:04,769 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-05 07:05:04,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:04,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:04,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:04,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:04,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:04,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:04,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:04,805 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:04,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 69 [2021-06-05 07:05:04,836 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:04,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:04,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 10 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 07:05:04,946 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 20 variables, input treesize:432, output treesize:135 [2021-06-05 07:05:05,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:05,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174500250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:05,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:05,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 07:05:05,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234070026] [2021-06-05 07:05:05,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 07:05:05,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:05,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 07:05:05,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:05:05,069 INFO L87 Difference]: Start difference. First operand 2086 states and 7328 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:05,389 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 31 [2021-06-05 07:05:05,683 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2021-06-05 07:05:05,988 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2021-06-05 07:05:06,528 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 45 [2021-06-05 07:05:06,853 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 45 [2021-06-05 07:05:13,696 WARN L205 SmtUtils]: Spent 6.31 s on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2021-06-05 07:05:42,046 WARN L205 SmtUtils]: Spent 28.29 s on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-06-05 07:06:10,716 WARN L205 SmtUtils]: Spent 28.25 s on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-06-05 07:06:10,955 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-06-05 07:06:11,148 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2021-06-05 07:06:11,347 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-06-05 07:06:13,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:13,956 INFO L93 Difference]: Finished difference Result 2587 states and 8784 transitions. [2021-06-05 07:06:13,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 07:06:13,957 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 07:06:13,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:13,960 INFO L225 Difference]: With dead ends: 2587 [2021-06-05 07:06:13,960 INFO L226 Difference]: Without dead ends: 2572 [2021-06-05 07:06:13,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243 ImplicationChecksByTransitivity, 97284.6ms TimeCoverageRelationStatistics Valid=855, Invalid=3567, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 07:06:13,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2572 states. [2021-06-05 07:06:13,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2572 to 2119. [2021-06-05 07:06:13,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 2118 states have (on average 3.514636449480642) internal successors, (7444), 2118 states have internal predecessors, (7444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:13,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 7444 transitions. [2021-06-05 07:06:13,987 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 7444 transitions. Word has length 29 [2021-06-05 07:06:13,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:13,987 INFO L482 AbstractCegarLoop]: Abstraction has 2119 states and 7444 transitions. [2021-06-05 07:06:13,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:13,987 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 7444 transitions. [2021-06-05 07:06:13,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 07:06:13,990 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:13,990 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:14,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 07:06:14,190 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:14,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:14,191 INFO L82 PathProgramCache]: Analyzing trace with hash -47808706, now seen corresponding path program 30 times [2021-06-05 07:06:14,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:14,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631848547] [2021-06-05 07:06:14,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:14,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:14,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:14,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:14,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631848547] [2021-06-05 07:06:14,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631848547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:14,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823455154] [2021-06-05 07:06:14,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:14,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:06:14,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:14,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 07:06:14,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:14,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:14,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:14,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:14,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 07:06:14,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:14,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:14,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:14,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:14,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:14,992 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-06-05 07:06:14,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 28 [2021-06-05 07:06:14,994 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:14,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:15,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:15,033 INFO L354 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2021-06-05 07:06:15,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 07:06:15,035 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:15,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:15,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:15,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:15,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:15,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:15,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:15,079 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:15,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 67 [2021-06-05 07:06:15,106 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:15,110 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 07:06:15,111 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:15,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:15,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:15,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:15,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:15,139 INFO L354 Elim1Store]: treesize reduction 21, result has 32.3 percent of original size [2021-06-05 07:06:15,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 19 [2021-06-05 07:06:15,141 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:15,143 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 07:06:15,144 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:15,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:15,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:15,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:15,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:15,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:15,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:15,171 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-05 07:06:15,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 19 [2021-06-05 07:06:15,173 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:15,175 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 07:06:15,176 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:15,226 INFO L628 ElimStorePlain]: treesize reduction 56, result has 38.5 percent of original size [2021-06-05 07:06:15,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 07:06:15,227 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:307, output treesize:35 [2021-06-05 07:06:15,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:15,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823455154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:15,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:15,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-06-05 07:06:15,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089193566] [2021-06-05 07:06:15,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:06:15,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:15,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:06:15,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:06:15,344 INFO L87 Difference]: Start difference. First operand 2119 states and 7444 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:17,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:17,875 INFO L93 Difference]: Finished difference Result 3291 states and 11148 transitions. [2021-06-05 07:06:17,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:06:17,875 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 07:06:17,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:17,880 INFO L225 Difference]: With dead ends: 3291 [2021-06-05 07:06:17,880 INFO L226 Difference]: Without dead ends: 3234 [2021-06-05 07:06:17,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 2580.4ms TimeCoverageRelationStatistics Valid=543, Invalid=2537, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 07:06:17,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3234 states. [2021-06-05 07:06:17,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3234 to 2177. [2021-06-05 07:06:17,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2177 states, 2176 states have (on average 3.5091911764705883) internal successors, (7636), 2176 states have internal predecessors, (7636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:17,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 7636 transitions. [2021-06-05 07:06:17,909 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 7636 transitions. Word has length 29 [2021-06-05 07:06:17,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:17,910 INFO L482 AbstractCegarLoop]: Abstraction has 2177 states and 7636 transitions. [2021-06-05 07:06:17,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:17,910 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 7636 transitions. [2021-06-05 07:06:17,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 07:06:17,912 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:17,912 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:18,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:18,113 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:18,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:18,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1876233986, now seen corresponding path program 31 times [2021-06-05 07:06:18,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:18,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235135967] [2021-06-05 07:06:18,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:18,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:18,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:18,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:18,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235135967] [2021-06-05 07:06:18,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235135967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:18,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299724982] [2021-06-05 07:06:18,513 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:18,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:18,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:06:18,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:18,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:18,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:18,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:18,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:18,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:19,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:19,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:19,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 69 [2021-06-05 07:06:19,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:19,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:19,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:19,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:19,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:19,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:19,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:19,097 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 07:06:19,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 26 [2021-06-05 07:06:19,098 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:19,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:19,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:19,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:19,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:19,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:19,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:19,132 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 07:06:19,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 07:06:19,134 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:19,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:19,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:19,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:19,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:19,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:19,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:19,187 INFO L354 Elim1Store]: treesize reduction 22, result has 61.4 percent of original size [2021-06-05 07:06:19,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 47 [2021-06-05 07:06:19,195 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:19,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:19,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:06:19,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:19,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:06:19,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:06:19,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:06:19,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 3 [2021-06-05 07:06:19,209 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:19,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:19,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:06:19,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:19,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:06:19,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:19,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:06:19,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:06:19,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-06-05 07:06:19,222 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:19,226 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 07:06:19,227 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:19,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:06:19,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:19,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:19,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:19,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:06:19,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:06:19,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:06:19,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2021-06-05 07:06:19,239 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:19,242 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 07:06:19,243 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:19,327 INFO L628 ElimStorePlain]: treesize reduction 44, result has 53.2 percent of original size [2021-06-05 07:06:19,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 07:06:19,328 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:367, output treesize:34 [2021-06-05 07:06:19,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:19,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299724982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:19,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:19,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 07:06:19,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101605201] [2021-06-05 07:06:19,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:06:19,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:19,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:06:19,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:06:19,429 INFO L87 Difference]: Start difference. First operand 2177 states and 7636 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:21,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:21,621 INFO L93 Difference]: Finished difference Result 3600 states and 12115 transitions. [2021-06-05 07:06:21,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 07:06:21,621 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 07:06:21,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:21,626 INFO L225 Difference]: With dead ends: 3600 [2021-06-05 07:06:21,626 INFO L226 Difference]: Without dead ends: 3556 [2021-06-05 07:06:21,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 2251.5ms TimeCoverageRelationStatistics Valid=683, Invalid=2739, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 07:06:21,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3556 states. [2021-06-05 07:06:21,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3556 to 2245. [2021-06-05 07:06:21,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2245 states, 2244 states have (on average 3.5062388591800357) internal successors, (7868), 2244 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:21,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 7868 transitions. [2021-06-05 07:06:21,660 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 7868 transitions. Word has length 29 [2021-06-05 07:06:21,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:21,660 INFO L482 AbstractCegarLoop]: Abstraction has 2245 states and 7868 transitions. [2021-06-05 07:06:21,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:21,660 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 7868 transitions. [2021-06-05 07:06:21,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 07:06:21,663 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:21,663 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:21,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:21,865 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:21,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:21,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1584110280, now seen corresponding path program 32 times [2021-06-05 07:06:21,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:21,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563491526] [2021-06-05 07:06:21,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:21,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:22,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:22,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:22,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563491526] [2021-06-05 07:06:22,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563491526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:22,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990314537] [2021-06-05 07:06:22,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:22,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:06:22,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:22,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:06:22,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:22,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:22,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990314537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:22,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:22,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 07:06:22,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6693645] [2021-06-05 07:06:22,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:06:22,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:22,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:06:22,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:06:22,772 INFO L87 Difference]: Start difference. First operand 2245 states and 7868 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:24,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:24,387 INFO L93 Difference]: Finished difference Result 3142 states and 10717 transitions. [2021-06-05 07:06:24,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:06:24,387 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 07:06:24,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:24,392 INFO L225 Difference]: With dead ends: 3142 [2021-06-05 07:06:24,392 INFO L226 Difference]: Without dead ends: 3112 [2021-06-05 07:06:24,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 1734.4ms TimeCoverageRelationStatistics Valid=539, Invalid=2217, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:06:24,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3112 states. [2021-06-05 07:06:24,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3112 to 2245. [2021-06-05 07:06:24,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2245 states, 2244 states have (on average 3.5062388591800357) internal successors, (7868), 2244 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:24,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 7868 transitions. [2021-06-05 07:06:24,422 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 7868 transitions. Word has length 29 [2021-06-05 07:06:24,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:24,422 INFO L482 AbstractCegarLoop]: Abstraction has 2245 states and 7868 transitions. [2021-06-05 07:06:24,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:24,423 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 7868 transitions. [2021-06-05 07:06:24,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 07:06:24,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:24,425 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:24,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-06-05 07:06:24,628 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:24,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:24,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1619613102, now seen corresponding path program 13 times [2021-06-05 07:06:24,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:24,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378398359] [2021-06-05 07:06:24,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:24,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:25,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:25,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:25,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378398359] [2021-06-05 07:06:25,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378398359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:25,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465202834] [2021-06-05 07:06:25,138 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:25,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:25,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:06:25,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:25,740 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-05 07:06:26,081 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2021-06-05 07:06:26,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:26,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465202834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:26,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:26,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 07:06:26,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667998414] [2021-06-05 07:06:26,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 07:06:26,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:26,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 07:06:26,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:06:26,324 INFO L87 Difference]: Start difference. First operand 2245 states and 7868 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:33,010 WARN L205 SmtUtils]: Spent 6.18 s on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-06-05 07:06:57,633 WARN L205 SmtUtils]: Spent 24.26 s on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2021-06-05 07:07:01,788 WARN L205 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2021-06-05 07:07:05,980 WARN L205 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2021-06-05 07:07:18,755 WARN L205 SmtUtils]: Spent 12.18 s on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-06-05 07:07:25,015 WARN L205 SmtUtils]: Spent 6.15 s on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-06-05 07:07:25,296 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2021-06-05 07:07:25,593 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2021-06-05 07:07:26,758 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 46 [2021-06-05 07:07:27,081 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 49 [2021-06-05 07:07:27,288 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 60 [2021-06-05 07:07:27,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:27,605 INFO L93 Difference]: Finished difference Result 3710 states and 12255 transitions. [2021-06-05 07:07:27,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 07:07:27,606 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 07:07:27,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:27,611 INFO L225 Difference]: With dead ends: 3710 [2021-06-05 07:07:27,611 INFO L226 Difference]: Without dead ends: 3695 [2021-06-05 07:07:27,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 61419.9ms TimeCoverageRelationStatistics Valid=782, Invalid=3250, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 07:07:27,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3695 states. [2021-06-05 07:07:27,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3695 to 2255. [2021-06-05 07:07:27,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2255 states, 2254 states have (on average 3.503549245785271) internal successors, (7897), 2254 states have internal predecessors, (7897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:27,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 7897 transitions. [2021-06-05 07:07:27,646 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 7897 transitions. Word has length 29 [2021-06-05 07:07:27,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:27,646 INFO L482 AbstractCegarLoop]: Abstraction has 2255 states and 7897 transitions. [2021-06-05 07:07:27,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:27,647 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 7897 transitions. [2021-06-05 07:07:27,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 07:07:27,649 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:27,649 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:27,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-06-05 07:07:27,850 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:27,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:27,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1969180942, now seen corresponding path program 14 times [2021-06-05 07:07:27,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:27,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356225592] [2021-06-05 07:07:27,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:27,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:28,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:28,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:28,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356225592] [2021-06-05 07:07:28,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356225592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:28,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659292504] [2021-06-05 07:07:28,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:28,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:07:28,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:28,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:07:28,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:29,107 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 91 [2021-06-05 07:07:29,198 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_41, v_prenex_39], 7=[A, v_prenex_43, v_prenex_42, v_prenex_40]} [2021-06-05 07:07:29,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:29,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:29,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:29,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:29,219 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:29,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-06-05 07:07:29,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:29,383 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 07:07:29,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:29,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:29,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:29,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:29,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:29,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:29,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-06-05 07:07:29,401 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:29,545 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 07:07:29,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:29,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:29,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:29,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:29,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:29,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:29,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-06-05 07:07:29,602 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:29,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:29,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:29,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:29,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:29,629 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:29,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-06-05 07:07:29,640 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:29,870 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2021-06-05 07:07:29,871 INFO L628 ElimStorePlain]: treesize reduction 24, result has 91.0 percent of original size [2021-06-05 07:07:29,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:29,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:29,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:29,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:29,896 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 07:07:29,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-06-05 07:07:29,897 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:30,000 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-05 07:07:30,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:30,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:30,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:30,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:30,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:30,033 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 07:07:30,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-06-05 07:07:30,034 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:30,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:30,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:30,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:30,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:30,058 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 07:07:30,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-06-05 07:07:30,060 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:30,215 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-06-05 07:07:30,216 INFO L628 ElimStorePlain]: treesize reduction 27, result has 85.5 percent of original size [2021-06-05 07:07:30,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:30,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:30,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:30,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:30,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:30,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-06-05 07:07:30,244 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:30,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:30,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 07:07:30,317 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:345, output treesize:82 [2021-06-05 07:07:30,447 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-06-05 07:07:30,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:30,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659292504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:30,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:30,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 07:07:30,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818014599] [2021-06-05 07:07:30,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:07:30,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:30,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:07:30,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:07:30,474 INFO L87 Difference]: Start difference. First operand 2255 states and 7897 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:34,433 WARN L205 SmtUtils]: Spent 3.32 s on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2021-06-05 07:07:47,209 WARN L205 SmtUtils]: Spent 12.22 s on a formula simplification. DAG size of input: 96 DAG size of output: 73 [2021-06-05 07:07:55,279 WARN L205 SmtUtils]: Spent 8.03 s on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2021-06-05 07:08:09,919 WARN L205 SmtUtils]: Spent 14.41 s on a formula simplification. DAG size of input: 100 DAG size of output: 76 [2021-06-05 07:08:10,258 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-06-05 07:08:10,399 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 33 [2021-06-05 07:08:10,759 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-06-05 07:08:11,028 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-06-05 07:08:11,202 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2021-06-05 07:08:11,684 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 96 [2021-06-05 07:08:12,109 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-06-05 07:08:12,581 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-05 07:08:12,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:12,734 INFO L93 Difference]: Finished difference Result 4143 states and 13701 transitions. [2021-06-05 07:08:12,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 07:08:12,734 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 07:08:12,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:12,740 INFO L225 Difference]: With dead ends: 4143 [2021-06-05 07:08:12,740 INFO L226 Difference]: Without dead ends: 4113 [2021-06-05 07:08:12,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 42587.9ms TimeCoverageRelationStatistics Valid=809, Invalid=3481, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 07:08:12,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4113 states. [2021-06-05 07:08:12,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4113 to 2272. [2021-06-05 07:08:12,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2272 states, 2271 states have (on average 3.5055041831792164) internal successors, (7961), 2271 states have internal predecessors, (7961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:12,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 7961 transitions. [2021-06-05 07:08:12,776 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 7961 transitions. Word has length 29 [2021-06-05 07:08:12,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:12,776 INFO L482 AbstractCegarLoop]: Abstraction has 2272 states and 7961 transitions. [2021-06-05 07:08:12,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:12,776 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 7961 transitions. [2021-06-05 07:08:12,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 07:08:12,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:12,779 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:12,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:12,979 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:12,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:12,980 INFO L82 PathProgramCache]: Analyzing trace with hash -580502318, now seen corresponding path program 15 times [2021-06-05 07:08:12,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:12,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110873048] [2021-06-05 07:08:12,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:12,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:13,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:13,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:13,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110873048] [2021-06-05 07:08:13,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110873048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:13,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027570117] [2021-06-05 07:08:13,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:13,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:08:13,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:13,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:08:13,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:14,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,101 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:14,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-06-05 07:08:14,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:14,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:08:14,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:08:14,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:08:14,192 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:14,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 35 treesize of output 88 [2021-06-05 07:08:14,262 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 07:08:14,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:08:14,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:08:14,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:08:14,301 INFO L354 Elim1Store]: treesize reduction 78, result has 1.3 percent of original size [2021-06-05 07:08:14,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 35 treesize of output 13 [2021-06-05 07:08:14,302 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:14,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:08:14,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:08:14,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:08:14,391 INFO L354 Elim1Store]: treesize reduction 14, result has 82.3 percent of original size [2021-06-05 07:08:14,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 35 treesize of output 74 [2021-06-05 07:08:14,428 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:14,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,447 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:14,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-06-05 07:08:14,448 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:14,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:08:14,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:08:14,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:08:14,536 INFO L354 Elim1Store]: treesize reduction 16, result has 79.7 percent of original size [2021-06-05 07:08:14,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 35 treesize of output 72 [2021-06-05 07:08:14,552 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:14,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:08:14,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:08:14,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:08:14,589 INFO L354 Elim1Store]: treesize reduction 78, result has 1.3 percent of original size [2021-06-05 07:08:14,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 35 treesize of output 13 [2021-06-05 07:08:14,590 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:14,594 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 07:08:14,595 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:14,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:14,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:08:14,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:08:14,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:08:14,672 INFO L354 Elim1Store]: treesize reduction 26, result has 67.1 percent of original size [2021-06-05 07:08:14,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 35 treesize of output 62 [2021-06-05 07:08:14,687 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:14,691 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 07:08:14,691 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:14,867 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 34 [2021-06-05 07:08:14,867 INFO L628 ElimStorePlain]: treesize reduction 219, result has 44.6 percent of original size [2021-06-05 07:08:14,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 07:08:14,870 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 2 variables, input treesize:632, output treesize:216 [2021-06-05 07:08:15,028 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-06-05 07:08:15,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:15,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027570117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:15,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:15,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 27 [2021-06-05 07:08:15,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048256281] [2021-06-05 07:08:15,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 07:08:15,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:15,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 07:08:15,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:08:15,112 INFO L87 Difference]: Start difference. First operand 2272 states and 7961 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:16,881 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2021-06-05 07:08:17,323 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-06-05 07:08:17,546 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-06-05 07:08:17,685 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-06-05 07:08:17,805 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-06-05 07:08:17,978 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2021-06-05 07:08:18,297 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-06-05 07:08:18,436 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-06-05 07:08:18,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:18,533 INFO L93 Difference]: Finished difference Result 3440 states and 11411 transitions. [2021-06-05 07:08:18,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 07:08:18,534 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 07:08:18,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:18,539 INFO L225 Difference]: With dead ends: 3440 [2021-06-05 07:08:18,539 INFO L226 Difference]: Without dead ends: 3375 [2021-06-05 07:08:18,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 3552.7ms TimeCoverageRelationStatistics Valid=410, Invalid=2782, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:08:18,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2021-06-05 07:08:18,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2300. [2021-06-05 07:08:18,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2300 states, 2299 states have (on average 3.4993475424097435) internal successors, (8045), 2299 states have internal predecessors, (8045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:18,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 8045 transitions. [2021-06-05 07:08:18,574 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 8045 transitions. Word has length 29 [2021-06-05 07:08:18,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:18,574 INFO L482 AbstractCegarLoop]: Abstraction has 2300 states and 8045 transitions. [2021-06-05 07:08:18,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:18,574 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 8045 transitions. [2021-06-05 07:08:18,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 07:08:18,577 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:18,577 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:18,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-05 07:08:18,777 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:18,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:18,778 INFO L82 PathProgramCache]: Analyzing trace with hash -517413926, now seen corresponding path program 16 times [2021-06-05 07:08:18,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:18,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693779713] [2021-06-05 07:08:18,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:18,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:19,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:19,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:19,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693779713] [2021-06-05 07:08:19,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693779713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:19,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313782500] [2021-06-05 07:08:19,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:19,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:08:19,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:19,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 07:08:19,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:19,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:19,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313782500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:19,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:19,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 07:08:19,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124800716] [2021-06-05 07:08:19,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:08:19,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:19,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:08:19,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:08:19,730 INFO L87 Difference]: Start difference. First operand 2300 states and 8045 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:20,710 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 48 [2021-06-05 07:08:20,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:20,953 INFO L93 Difference]: Finished difference Result 3205 states and 10722 transitions. [2021-06-05 07:08:20,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:08:20,954 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 07:08:20,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:20,959 INFO L225 Difference]: With dead ends: 3205 [2021-06-05 07:08:20,959 INFO L226 Difference]: Without dead ends: 3190 [2021-06-05 07:08:20,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1542.6ms TimeCoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 07:08:20,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3190 states. [2021-06-05 07:08:21,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3190 to 2296. [2021-06-05 07:08:21,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2296 states, 2295 states have (on average 3.5002178649237474) internal successors, (8033), 2295 states have internal predecessors, (8033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:21,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2296 states to 2296 states and 8033 transitions. [2021-06-05 07:08:21,019 INFO L78 Accepts]: Start accepts. Automaton has 2296 states and 8033 transitions. Word has length 29 [2021-06-05 07:08:21,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:21,019 INFO L482 AbstractCegarLoop]: Abstraction has 2296 states and 8033 transitions. [2021-06-05 07:08:21,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:21,019 INFO L276 IsEmpty]: Start isEmpty. Operand 2296 states and 8033 transitions. [2021-06-05 07:08:21,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 07:08:21,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:21,022 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:21,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable516,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:21,222 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:21,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:21,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1600210838, now seen corresponding path program 17 times [2021-06-05 07:08:21,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:21,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480878914] [2021-06-05 07:08:21,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:21,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:21,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:21,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:21,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480878914] [2021-06-05 07:08:21,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480878914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:21,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496914182] [2021-06-05 07:08:21,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:21,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:08:21,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:21,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:08:21,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:22,211 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-05 07:08:22,565 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_51, v_prenex_55], 7=[v_prenex_50, A, v_prenex_54, v_prenex_52, v_prenex_58, v_prenex_57]} [2021-06-05 07:08:22,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:22,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:22,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:22,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:22,587 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:22,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-06-05 07:08:22,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:22,736 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 07:08:22,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:22,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:22,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:22,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:22,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:22,754 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:22,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-06-05 07:08:22,755 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:22,895 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-05 07:08:22,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:22,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:22,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:22,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:22,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:22,924 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 07:08:22,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-06-05 07:08:22,926 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:23,061 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-05 07:08:23,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:23,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:23,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:23,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:23,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:23,086 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:23,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-06-05 07:08:23,095 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:23,226 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-05 07:08:23,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:23,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:23,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:23,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:23,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:23,254 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 07:08:23,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-06-05 07:08:23,256 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:23,379 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-05 07:08:23,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:23,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:23,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:23,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:23,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:23,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:23,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-06-05 07:08:23,415 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:23,527 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 07:08:23,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:23,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:23,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:23,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:23,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:23,552 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:23,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-06-05 07:08:23,564 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:23,667 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-05 07:08:23,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:23,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:23,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:23,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:23,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:23,705 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 07:08:23,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-06-05 07:08:23,707 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:23,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:23,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 07:08:23,810 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:345, output treesize:103 [2021-06-05 07:08:23,975 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2021-06-05 07:08:23,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:23,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496914182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:23,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:23,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 07:08:23,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572704019] [2021-06-05 07:08:23,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:08:23,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:23,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:08:23,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:08:23,993 INFO L87 Difference]: Start difference. First operand 2296 states and 8033 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:32,587 WARN L205 SmtUtils]: Spent 8.11 s on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-06-05 07:09:01,097 WARN L205 SmtUtils]: Spent 28.23 s on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-06-05 07:09:09,294 WARN L205 SmtUtils]: Spent 8.14 s on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-06-05 07:09:36,785 WARN L205 SmtUtils]: Spent 27.31 s on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2021-06-05 07:09:37,317 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2021-06-05 07:09:37,566 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 81 [2021-06-05 07:09:37,862 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-06-05 07:09:38,177 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2021-06-05 07:09:38,653 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2021-06-05 07:09:38,952 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-06-05 07:09:39,175 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2021-06-05 07:09:39,538 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 91 [2021-06-05 07:09:39,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:39,822 INFO L93 Difference]: Finished difference Result 3169 states and 10683 transitions. [2021-06-05 07:09:39,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 07:09:39,822 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 07:09:39,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:39,827 INFO L225 Difference]: With dead ends: 3169 [2021-06-05 07:09:39,827 INFO L226 Difference]: Without dead ends: 3115 [2021-06-05 07:09:39,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 75908.8ms TimeCoverageRelationStatistics Valid=458, Invalid=2734, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:09:39,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3115 states. [2021-06-05 07:09:39,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3115 to 2316. [2021-06-05 07:09:39,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2316 states, 2315 states have (on average 3.498488120950324) internal successors, (8099), 2315 states have internal predecessors, (8099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:39,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2316 states to 2316 states and 8099 transitions. [2021-06-05 07:09:39,860 INFO L78 Accepts]: Start accepts. Automaton has 2316 states and 8099 transitions. Word has length 29 [2021-06-05 07:09:39,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:39,860 INFO L482 AbstractCegarLoop]: Abstraction has 2316 states and 8099 transitions. [2021-06-05 07:09:39,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:39,861 INFO L276 IsEmpty]: Start isEmpty. Operand 2316 states and 8099 transitions. [2021-06-05 07:09:39,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 07:09:39,863 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:39,863 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:09:40,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable523,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:40,064 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:40,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:40,064 INFO L82 PathProgramCache]: Analyzing trace with hash 2024544714, now seen corresponding path program 18 times [2021-06-05 07:09:40,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:40,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358776010] [2021-06-05 07:09:40,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:40,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:40,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:40,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:40,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358776010] [2021-06-05 07:09:40,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358776010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:40,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141177858] [2021-06-05 07:09:40,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:40,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:09:40,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:40,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 07:09:40,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:40,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:40,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141177858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:40,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:40,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 07:09:40,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120870247] [2021-06-05 07:09:40,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:09:40,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:40,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:09:40,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:09:40,960 INFO L87 Difference]: Start difference. First operand 2316 states and 8099 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:41,553 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-06-05 07:09:41,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:41,663 INFO L93 Difference]: Finished difference Result 2857 states and 9771 transitions. [2021-06-05 07:09:41,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:09:41,663 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 07:09:41,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:41,668 INFO L225 Difference]: With dead ends: 2857 [2021-06-05 07:09:41,668 INFO L226 Difference]: Without dead ends: 2842 [2021-06-05 07:09:41,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1117.0ms TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2021-06-05 07:09:41,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2842 states. [2021-06-05 07:09:41,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2842 to 2306. [2021-06-05 07:09:41,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2305 states have (on average 3.5010845986984815) internal successors, (8070), 2305 states have internal predecessors, (8070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:41,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 8070 transitions. [2021-06-05 07:09:41,703 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 8070 transitions. Word has length 29 [2021-06-05 07:09:41,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:41,703 INFO L482 AbstractCegarLoop]: Abstraction has 2306 states and 8070 transitions. [2021-06-05 07:09:41,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:41,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 8070 transitions. [2021-06-05 07:09:41,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 07:09:41,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:41,721 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:09:41,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable557 [2021-06-05 07:09:41,922 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:41,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:41,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1418429486, now seen corresponding path program 19 times [2021-06-05 07:09:41,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:41,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401713080] [2021-06-05 07:09:41,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:41,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:42,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:42,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:42,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401713080] [2021-06-05 07:09:42,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401713080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:42,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760804894] [2021-06-05 07:09:42,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:42,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:42,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:09:42,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:48,756 WARN L205 SmtUtils]: Spent 6.06 s on a formula simplification that was a NOOP. DAG size: 39 [2021-06-05 07:09:52,878 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification that was a NOOP. DAG size: 58 [2021-06-05 07:09:53,078 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_70, v_prenex_67], 7=[A, v_prenex_74, v_prenex_73, v_prenex_69, v_prenex_68, v_prenex_77]} [2021-06-05 07:09:53,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:53,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:53,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:53,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:53,097 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:53,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-06-05 07:09:53,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:53,219 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-06-05 07:09:53,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:53,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:53,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:53,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:53,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:53,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:53,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-06-05 07:09:53,237 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:53,370 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-05 07:09:53,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:53,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:53,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:53,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:53,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:53,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:53,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-06-05 07:09:53,403 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:53,511 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-05 07:09:53,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:53,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:53,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:53,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:53,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:53,538 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 07:09:53,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-06-05 07:09:53,540 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:53,677 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-05 07:09:53,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:53,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:53,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:53,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:53,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:53,707 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 07:09:53,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-06-05 07:09:53,709 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:53,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:53,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:53,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:53,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:53,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:53,830 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:53,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-06-05 07:09:53,855 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:53,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:53,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:53,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:53,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:53,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:53,975 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 07:09:53,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-06-05 07:09:53,976 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:54,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:54,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:54,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:54,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:54,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:54,090 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:54,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-06-05 07:09:54,101 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:54,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:54,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 07:09:54,193 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:305, output treesize:91 [2021-06-05 07:09:54,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:54,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760804894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:54,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:54,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 07:09:54,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721095398] [2021-06-05 07:09:54,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:09:54,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:54,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:09:54,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:09:54,309 INFO L87 Difference]: Start difference. First operand 2306 states and 8070 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:05,003 WARN L205 SmtUtils]: Spent 10.08 s on a formula simplification. DAG size of input: 76 DAG size of output: 48 [2021-06-05 07:10:15,495 WARN L205 SmtUtils]: Spent 10.18 s on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-06-05 07:10:27,875 WARN L205 SmtUtils]: Spent 10.19 s on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-06-05 07:10:36,102 WARN L205 SmtUtils]: Spent 8.20 s on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-06-05 07:10:56,503 WARN L205 SmtUtils]: Spent 18.30 s on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2021-06-05 07:11:08,799 WARN L205 SmtUtils]: Spent 12.26 s on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-06-05 07:11:17,211 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-06-05 07:11:17,367 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-06-05 07:11:17,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:17,655 INFO L93 Difference]: Finished difference Result 3233 states and 11042 transitions. [2021-06-05 07:11:17,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:11:17,655 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 07:11:17,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:17,661 INFO L225 Difference]: With dead ends: 3233 [2021-06-05 07:11:17,661 INFO L226 Difference]: Without dead ends: 3218 [2021-06-05 07:11:17,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 81254.2ms TimeCoverageRelationStatistics Valid=329, Invalid=1651, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:11:17,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3218 states. [2021-06-05 07:11:17,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3218 to 2318. [2021-06-05 07:11:17,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2318 states, 2317 states have (on average 3.503668536901165) internal successors, (8118), 2317 states have internal predecessors, (8118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:17,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2318 states to 2318 states and 8118 transitions. [2021-06-05 07:11:17,705 INFO L78 Accepts]: Start accepts. Automaton has 2318 states and 8118 transitions. Word has length 29 [2021-06-05 07:11:17,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:17,706 INFO L482 AbstractCegarLoop]: Abstraction has 2318 states and 8118 transitions. [2021-06-05 07:11:17,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:17,706 INFO L276 IsEmpty]: Start isEmpty. Operand 2318 states and 8118 transitions. [2021-06-05 07:11:17,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 07:11:17,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:17,710 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:17,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2021-06-05 07:11:17,932 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:17,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:17,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1099848014, now seen corresponding path program 33 times [2021-06-05 07:11:17,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:17,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293021262] [2021-06-05 07:11:17,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:17,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:18,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:18,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:18,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293021262] [2021-06-05 07:11:18,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293021262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:18,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168646935] [2021-06-05 07:11:18,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:18,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 07:11:18,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:18,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:11:18,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:18,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:18,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:18,769 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:11:18,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 07:11:18,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:11:18,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:18,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:18,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:18,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:18,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:18,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:18,835 INFO L354 Elim1Store]: treesize reduction 24, result has 59.3 percent of original size [2021-06-05 07:11:18,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 47 [2021-06-05 07:11:18,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 07:11:18,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:18,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:18,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:18,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:18,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:18,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:18,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:11:18,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 71 [2021-06-05 07:11:18,941 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 07:11:18,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:18,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:18,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:18,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:18,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:18,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:19,001 INFO L354 Elim1Store]: treesize reduction 38, result has 35.6 percent of original size [2021-06-05 07:11:19,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 33 [2021-06-05 07:11:19,003 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 07:11:19,008 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 07:11:19,009 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 07:11:19,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:19,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:11:19,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:11:19,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:11:19,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:11:19,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2021-06-05 07:11:19,021 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 07:11:19,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:19,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:19,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:19,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:19,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:19,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:19,051 INFO L354 Elim1Store]: treesize reduction 21, result has 32.3 percent of original size [2021-06-05 07:11:19,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 19 [2021-06-05 07:11:19,053 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 07:11:19,055 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 07:11:19,056 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 07:11:19,058 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 07:11:19,058 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 07:11:19,117 INFO L628 ElimStorePlain]: treesize reduction 43, result has 50.6 percent of original size [2021-06-05 07:11:19,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 07:11:19,118 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:388, output treesize:34 [2021-06-05 07:11:19,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:19,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168646935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:19,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:19,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 07:11:19,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962519536] [2021-06-05 07:11:19,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:11:19,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:19,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:11:19,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:11:19,203 INFO L87 Difference]: Start difference. First operand 2318 states and 8118 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:19,882 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-06-05 07:11:21,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:21,871 INFO L93 Difference]: Finished difference Result 4037 states and 13530 transitions. [2021-06-05 07:11:21,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:11:21,871 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 07:11:21,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:21,877 INFO L225 Difference]: With dead ends: 4037 [2021-06-05 07:11:21,877 INFO L226 Difference]: Without dead ends: 3993 [2021-06-05 07:11:21,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 2513.3ms TimeCoverageRelationStatistics Valid=657, Invalid=2535, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:11:21,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3993 states. [2021-06-05 07:11:21,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3993 to 2466. [2021-06-05 07:11:21,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2466 states, 2465 states have (on average 3.5030425963488843) internal successors, (8635), 2465 states have internal predecessors, (8635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:21,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2466 states to 2466 states and 8635 transitions. [2021-06-05 07:11:21,917 INFO L78 Accepts]: Start accepts. Automaton has 2466 states and 8635 transitions. Word has length 29 [2021-06-05 07:11:21,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:21,917 INFO L482 AbstractCegarLoop]: Abstraction has 2466 states and 8635 transitions. [2021-06-05 07:11:21,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:21,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2466 states and 8635 transitions. [2021-06-05 07:11:21,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 07:11:21,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:21,920 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:22,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-05 07:11:22,121 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:22,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:22,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1934471044, now seen corresponding path program 34 times [2021-06-05 07:11:22,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:22,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250025208] [2021-06-05 07:11:22,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:22,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:22,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:22,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:22,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250025208] [2021-06-05 07:11:22,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250025208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:22,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282016801] [2021-06-05 07:11:22,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:22,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:11:22,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:22,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:11:22,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:22,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:22,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282016801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:22,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:22,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 07:11:22,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449521583] [2021-06-05 07:11:22,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:11:22,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:22,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:11:22,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:11:22,971 INFO L87 Difference]: Start difference. First operand 2466 states and 8635 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:24,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:24,854 INFO L93 Difference]: Finished difference Result 3644 states and 12305 transitions. [2021-06-05 07:11:24,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:11:24,854 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 07:11:24,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:24,860 INFO L225 Difference]: With dead ends: 3644 [2021-06-05 07:11:24,860 INFO L226 Difference]: Without dead ends: 3600 [2021-06-05 07:11:24,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 1811.1ms TimeCoverageRelationStatistics Valid=515, Invalid=2137, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 07:11:24,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3600 states. [2021-06-05 07:11:24,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3600 to 2454. [2021-06-05 07:11:24,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2454 states, 2453 states have (on average 3.5026498165511617) internal successors, (8592), 2453 states have internal predecessors, (8592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:24,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2454 states to 2454 states and 8592 transitions. [2021-06-05 07:11:24,898 INFO L78 Accepts]: Start accepts. Automaton has 2454 states and 8592 transitions. Word has length 29 [2021-06-05 07:11:24,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:24,898 INFO L482 AbstractCegarLoop]: Abstraction has 2454 states and 8592 transitions. [2021-06-05 07:11:24,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:24,898 INFO L276 IsEmpty]: Start isEmpty. Operand 2454 states and 8592 transitions. [2021-06-05 07:11:24,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 07:11:24,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:24,901 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:25,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:25,102 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:25,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:25,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1316037810, now seen corresponding path program 20 times [2021-06-05 07:11:25,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:25,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670405917] [2021-06-05 07:11:25,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:25,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:25,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:25,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:25,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670405917] [2021-06-05 07:11:25,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670405917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:25,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920626548] [2021-06-05 07:11:25,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:25,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:11:25,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:25,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 07:11:25,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:26,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,090 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 07:11:26,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2021-06-05 07:11:26,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:11:26,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,108 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 07:11:26,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 13 [2021-06-05 07:11:26,109 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 07:11:26,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:11:26,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-06-05 07:11:26,143 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 07:11:26,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,158 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 07:11:26,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2021-06-05 07:11:26,160 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 07:11:26,162 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 07:11:26,163 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 07:11:26,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,199 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 07:11:26,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-06-05 07:11:26,201 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 07:11:26,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,238 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 07:11:26,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-06-05 07:11:26,240 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 07:11:26,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:11:26,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-06-05 07:11:26,281 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 07:11:26,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,298 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 07:11:26,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 13 [2021-06-05 07:11:26,299 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 07:11:26,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,317 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 07:11:26,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 13 [2021-06-05 07:11:26,318 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 07:11:26,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:11:26,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-06-05 07:11:26,333 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 07:11:26,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:26,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:11:26,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-06-05 07:11:26,359 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 07:11:26,417 INFO L628 ElimStorePlain]: treesize reduction 33, result has 57.7 percent of original size [2021-06-05 07:11:26,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 07:11:26,419 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:431, output treesize:45 [2021-06-05 07:11:26,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:26,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920626548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:26,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:26,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2021-06-05 07:11:26,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770965466] [2021-06-05 07:11:26,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:11:26,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:26,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:11:26,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:11:26,479 INFO L87 Difference]: Start difference. First operand 2454 states and 8592 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:27,376 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 61 [2021-06-05 07:11:27,589 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 55 [2021-06-05 07:11:27,718 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-06-05 07:11:27,887 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-06-05 07:11:28,173 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-06-05 07:11:28,588 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 66 [2021-06-05 07:11:28,794 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-06-05 07:11:28,939 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 38 [2021-06-05 07:11:29,167 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2021-06-05 07:11:29,341 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2021-06-05 07:11:30,005 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 35 [2021-06-05 07:11:30,170 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-06-05 07:11:30,465 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-06-05 07:11:30,628 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2021-06-05 07:11:30,818 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 47 [2021-06-05 07:11:30,999 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 58 [2021-06-05 07:11:31,160 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 67 [2021-06-05 07:11:31,449 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-06-05 07:11:31,835 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-06-05 07:11:32,094 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 75 [2021-06-05 07:11:32,391 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2021-06-05 07:11:32,522 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 66 [2021-06-05 07:11:32,750 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 73 [2021-06-05 07:11:32,923 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-06-05 07:11:33,206 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-06-05 07:11:33,507 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 74 [2021-06-05 07:11:33,828 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2021-06-05 07:11:34,177 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 93 [2021-06-05 07:11:34,340 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-06-05 07:11:34,513 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-06-05 07:11:34,749 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2021-06-05 07:11:34,968 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-06-05 07:11:35,328 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-06-05 07:11:35,527 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-06-05 07:11:35,878 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2021-06-05 07:11:36,163 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-06-05 07:11:36,716 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-06-05 07:11:36,890 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-06-05 07:11:37,126 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 62 [2021-06-05 07:11:37,383 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2021-06-05 07:11:37,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:37,532 INFO L93 Difference]: Finished difference Result 4608 states and 15272 transitions. [2021-06-05 07:11:37,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 07:11:37,532 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 07:11:37,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:37,540 INFO L225 Difference]: With dead ends: 4608 [2021-06-05 07:11:37,540 INFO L226 Difference]: Without dead ends: 4593 [2021-06-05 07:11:37,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2963 ImplicationChecksByTransitivity, 9806.1ms TimeCoverageRelationStatistics Valid=908, Invalid=7648, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 07:11:37,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4593 states. [2021-06-05 07:11:37,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4593 to 2453. [2021-06-05 07:11:37,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 2452 states have (on average 3.504078303425775) internal successors, (8592), 2452 states have internal predecessors, (8592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:37,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 8592 transitions. [2021-06-05 07:11:37,600 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 8592 transitions. Word has length 29 [2021-06-05 07:11:37,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:37,600 INFO L482 AbstractCegarLoop]: Abstraction has 2453 states and 8592 transitions. [2021-06-05 07:11:37,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:37,600 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 8592 transitions. [2021-06-05 07:11:37,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 07:11:37,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:37,604 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:37,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable724 [2021-06-05 07:11:37,821 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:37,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:37,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1804724658, now seen corresponding path program 21 times [2021-06-05 07:11:37,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:37,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293589403] [2021-06-05 07:11:37,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:37,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:38,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:38,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:38,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293589403] [2021-06-05 07:11:38,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293589403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:38,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723455728] [2021-06-05 07:11:38,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:38,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:11:38,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:38,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:11:38,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:19,250 WARN L205 SmtUtils]: Spent 40.28 s on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-06-05 07:12:19,426 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 25 [2021-06-05 07:12:19,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:19,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:19,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:19,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:19,473 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:12:19,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-06-05 07:12:19,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:12:19,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:19,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:19,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:19,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:19,486 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:12:19,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-06-05 07:12:19,487 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 07:12:19,551 INFO L628 ElimStorePlain]: treesize reduction 15, result has 81.3 percent of original size [2021-06-05 07:12:19,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:19,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:19,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:19,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:19,561 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:12:19,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-06-05 07:12:19,562 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 07:12:19,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:12:19,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:19,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:19,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:19,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:19,600 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:12:19,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-06-05 07:12:19,602 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 07:12:19,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:12:19,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 07:12:19,633 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:112, output treesize:33 [2021-06-05 07:12:19,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:19,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723455728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:19,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:19,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-06-05 07:12:19,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478021954] [2021-06-05 07:12:19,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 07:12:19,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:19,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 07:12:19,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:12:19,703 INFO L87 Difference]: Start difference. First operand 2453 states and 8592 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:20,780 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-06-05 07:12:21,537 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-06-05 07:12:21,799 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2021-06-05 07:12:22,900 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 52 [2021-06-05 07:12:23,149 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2021-06-05 07:12:23,296 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2021-06-05 07:12:23,445 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2021-06-05 07:12:28,448 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2021-06-05 07:12:28,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:28,548 INFO L93 Difference]: Finished difference Result 4353 states and 14593 transitions. [2021-06-05 07:12:28,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 07:12:28,548 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 07:12:28,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:28,555 INFO L225 Difference]: With dead ends: 4353 [2021-06-05 07:12:28,555 INFO L226 Difference]: Without dead ends: 4323 [2021-06-05 07:12:28,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1511 ImplicationChecksByTransitivity, 46982.5ms TimeCoverageRelationStatistics Valid=650, Invalid=4041, Unknown=1, NotChecked=0, Total=4692 [2021-06-05 07:12:28,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4323 states. [2021-06-05 07:12:28,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4323 to 2463. [2021-06-05 07:12:28,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2463 states, 2462 states have (on average 3.500812347684809) internal successors, (8619), 2462 states have internal predecessors, (8619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:28,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 8619 transitions. [2021-06-05 07:12:28,597 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 8619 transitions. Word has length 29 [2021-06-05 07:12:28,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:28,597 INFO L482 AbstractCegarLoop]: Abstraction has 2463 states and 8619 transitions. [2021-06-05 07:12:28,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:28,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 8619 transitions. [2021-06-05 07:12:28,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 07:12:28,600 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:28,600 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:12:28,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable743,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:28,801 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:28,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:28,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1829857094, now seen corresponding path program 22 times [2021-06-05 07:12:28,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:28,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265652373] [2021-06-05 07:12:28,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:28,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:29,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:29,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:29,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265652373] [2021-06-05 07:12:29,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265652373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:29,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530643925] [2021-06-05 07:12:29,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:29,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:12:29,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:29,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:12:29,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:33,882 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification that was a NOOP. DAG size: 61 [2021-06-05 07:12:34,248 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-05 07:12:34,649 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 89 [2021-06-05 07:12:34,711 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_93, v_prenex_91], 7=[v_prenex_94, A, v_prenex_92, v_prenex_90]} [2021-06-05 07:12:34,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:34,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:34,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:34,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:34,730 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:12:34,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-06-05 07:12:34,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:12:34,933 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 07:12:34,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:12:34,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:34,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:34,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:34,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:34,956 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:12:34,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-06-05 07:12:34,958 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 07:12:35,137 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 07:12:35,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:12:35,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:35,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:35,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:35,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:35,168 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:12:35,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-06-05 07:12:35,177 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 07:12:35,339 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 07:12:35,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:12:35,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:35,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:35,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:35,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:35,372 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 07:12:35,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-06-05 07:12:35,375 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 07:12:35,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:35,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:35,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:35,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:35,409 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 07:12:35,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-06-05 07:12:35,411 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 07:12:35,628 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-06-05 07:12:35,628 INFO L628 ElimStorePlain]: treesize reduction 27, result has 89.3 percent of original size [2021-06-05 07:12:35,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:35,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:35,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:35,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:35,653 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 07:12:35,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-06-05 07:12:35,655 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 07:12:35,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:12:35,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:35,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:35,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:35,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:35,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:12:35,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-06-05 07:12:35,794 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 07:12:35,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:35,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:35,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:35,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:35,817 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:12:35,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-06-05 07:12:35,826 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 07:12:35,966 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-06-05 07:12:35,966 INFO L628 ElimStorePlain]: treesize reduction 24, result has 85.0 percent of original size [2021-06-05 07:12:35,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 07:12:35,970 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:345, output treesize:82 [2021-06-05 07:12:36,103 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-06-05 07:12:36,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:36,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530643925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:36,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:36,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-06-05 07:12:36,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064921188] [2021-06-05 07:12:36,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 07:12:36,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:36,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 07:12:36,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:12:36,134 INFO L87 Difference]: Start difference. First operand 2463 states and 8619 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:38,818 WARN L205 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2021-06-05 07:12:39,037 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-06-05 07:12:45,145 WARN L205 SmtUtils]: Spent 6.06 s on a formula simplification. DAG size of input: 91 DAG size of output: 51 [2021-06-05 07:12:47,712 WARN L205 SmtUtils]: Spent 2.53 s on a formula simplification. DAG size of input: 85 DAG size of output: 52 [2021-06-05 07:12:47,879 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 36 [2021-06-05 07:12:48,131 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2021-06-05 07:12:48,425 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-06-05 07:12:48,583 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2021-06-05 07:12:53,512 WARN L205 SmtUtils]: Spent 4.84 s on a formula simplification. DAG size of input: 105 DAG size of output: 59 [2021-06-05 07:12:53,749 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-06-05 07:13:08,031 WARN L205 SmtUtils]: Spent 14.19 s on a formula simplification. DAG size of input: 92 DAG size of output: 64 [2021-06-05 07:13:16,282 WARN L205 SmtUtils]: Spent 8.22 s on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2021-06-05 07:13:27,419 WARN L205 SmtUtils]: Spent 11.10 s on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-06-05 07:13:28,068 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-06-05 07:13:31,758 WARN L205 SmtUtils]: Spent 3.52 s on a formula simplification. DAG size of input: 109 DAG size of output: 71 [2021-06-05 07:13:42,058 WARN L205 SmtUtils]: Spent 10.23 s on a formula simplification. DAG size of input: 86 DAG size of output: 76 [2021-06-05 07:13:52,571 WARN L205 SmtUtils]: Spent 10.44 s on a formula simplification. DAG size of input: 101 DAG size of output: 80 [2021-06-05 07:13:52,832 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2021-06-05 07:13:53,048 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 60 [2021-06-05 07:13:53,448 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-06-05 07:13:54,007 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 94 [2021-06-05 07:13:54,340 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 108 [2021-06-05 07:13:54,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:54,966 INFO L93 Difference]: Finished difference Result 4854 states and 16220 transitions. [2021-06-05 07:13:54,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 07:13:54,966 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 07:13:54,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:54,975 INFO L225 Difference]: With dead ends: 4854 [2021-06-05 07:13:54,976 INFO L226 Difference]: Without dead ends: 4824 [2021-06-05 07:13:54,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 82890.2ms TimeCoverageRelationStatistics Valid=761, Invalid=4069, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 07:13:54,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4824 states. [2021-06-05 07:13:55,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4824 to 2470. [2021-06-05 07:13:55,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2470 states, 2469 states have (on average 3.5006075334143376) internal successors, (8643), 2469 states have internal predecessors, (8643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:55,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2470 states to 2470 states and 8643 transitions. [2021-06-05 07:13:55,033 INFO L78 Accepts]: Start accepts. Automaton has 2470 states and 8643 transitions. Word has length 29 [2021-06-05 07:13:55,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:55,034 INFO L482 AbstractCegarLoop]: Abstraction has 2470 states and 8643 transitions. [2021-06-05 07:13:55,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:55,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2470 states and 8643 transitions. [2021-06-05 07:13:55,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 07:13:55,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:55,038 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:13:55,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable760 [2021-06-05 07:13:55,253 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:55,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:55,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1094655562, now seen corresponding path program 23 times [2021-06-05 07:13:55,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:55,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250656261] [2021-06-05 07:13:55,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:55,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:55,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:55,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:55,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250656261] [2021-06-05 07:13:55,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250656261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:55,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638468612] [2021-06-05 07:13:55,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:55,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:13:55,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:55,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:13:55,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:56,388 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-05 07:13:56,800 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2021-06-05 07:13:57,100 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2021-06-05 07:13:57,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:57,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638468612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:57,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:57,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2021-06-05 07:13:57,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680089458] [2021-06-05 07:13:57,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 07:13:57,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:57,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 07:13:57,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:13:57,300 INFO L87 Difference]: Start difference. First operand 2470 states and 8643 transitions. Second operand has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:59,565 WARN L205 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-06-05 07:13:59,905 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-06-05 07:14:06,026 WARN L205 SmtUtils]: Spent 6.10 s on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-06-05 07:14:06,314 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-06-05 07:14:06,706 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2021-06-05 07:14:07,053 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2021-06-05 07:14:11,300 WARN L205 SmtUtils]: Spent 4.21 s on a formula simplification. DAG size of input: 103 DAG size of output: 49 [2021-06-05 07:14:13,595 WARN L205 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 90 DAG size of output: 80 [2021-06-05 07:14:13,954 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2021-06-05 07:14:18,371 WARN L205 SmtUtils]: Spent 4.22 s on a formula simplification. DAG size of input: 99 DAG size of output: 71 [2021-06-05 07:14:22,812 WARN L205 SmtUtils]: Spent 4.39 s on a formula simplification. DAG size of input: 117 DAG size of output: 82 [2021-06-05 07:14:25,170 WARN L205 SmtUtils]: Spent 2.29 s on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2021-06-05 07:14:25,437 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 64 [2021-06-05 07:14:25,623 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 59 [2021-06-05 07:14:26,272 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-06-05 07:14:26,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:14:26,373 INFO L93 Difference]: Finished difference Result 4250 states and 14363 transitions. [2021-06-05 07:14:26,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 07:14:26,373 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 07:14:26,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:14:26,380 INFO L225 Difference]: With dead ends: 4250 [2021-06-05 07:14:26,380 INFO L226 Difference]: Without dead ends: 4235 [2021-06-05 07:14:26,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 29521.3ms TimeCoverageRelationStatistics Valid=552, Invalid=2640, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:14:26,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4235 states. [2021-06-05 07:14:26,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4235 to 2477. [2021-06-05 07:14:26,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 2476 states have (on average 3.500403877221325) internal successors, (8667), 2476 states have internal predecessors, (8667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:26,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 8667 transitions. [2021-06-05 07:14:26,420 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 8667 transitions. Word has length 29 [2021-06-05 07:14:26,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:14:26,420 INFO L482 AbstractCegarLoop]: Abstraction has 2477 states and 8667 transitions. [2021-06-05 07:14:26,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:26,420 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 8667 transitions. [2021-06-05 07:14:26,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 07:14:26,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:14:26,423 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:14:26,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable793 [2021-06-05 07:14:26,624 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:14:26,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:14:26,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1069523126, now seen corresponding path program 24 times [2021-06-05 07:14:26,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:14:26,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529613186] [2021-06-05 07:14:26,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:14:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:14:27,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:27,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:14:27,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529613186] [2021-06-05 07:14:27,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529613186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:27,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366159678] [2021-06-05 07:14:27,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:14:27,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:14:27,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:14:27,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:14:27,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:14:31,626 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification that was a NOOP. DAG size: 34 [2021-06-05 07:15:11,966 WARN L205 SmtUtils]: Spent 40.24 s on a formula simplification. DAG size of input: 102 DAG size of output: 82 [2021-06-05 07:15:12,032 INFO L446 ElimStorePlain]: Different costs {5=[A, v_prenex_111], 7=[v_prenex_107, v_prenex_108, v_prenex_109, v_prenex_110]} [2021-06-05 07:15:12,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:12,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:12,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:12,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:12,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:15:12,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-06-05 07:15:12,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:15:12,186 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 07:15:12,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:15:12,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:12,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:12,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:12,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:12,216 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:15:12,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-06-05 07:15:12,218 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 07:15:12,349 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-05 07:15:12,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:15:12,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:12,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:12,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:12,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:12,383 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:15:12,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-06-05 07:15:12,390 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 07:15:12,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:12,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:12,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:12,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:12,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:15:12,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-06-05 07:15:12,424 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 07:15:12,617 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-06-05 07:15:12,618 INFO L628 ElimStorePlain]: treesize reduction 19, result has 91.5 percent of original size [2021-06-05 07:15:12,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:12,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:12,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:12,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:12,652 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 07:15:12,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-06-05 07:15:12,653 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 07:15:12,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:12,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:12,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:12,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:12,680 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 07:15:12,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-06-05 07:15:12,682 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 07:15:12,840 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-06-05 07:15:12,841 INFO L628 ElimStorePlain]: treesize reduction 21, result has 87.3 percent of original size [2021-06-05 07:15:12,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:12,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:12,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:12,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:12,867 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 07:15:12,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-06-05 07:15:12,869 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 07:15:12,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:15:12,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:12,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:12,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:12,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:12,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:15:12,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-06-05 07:15:12,958 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 07:15:13,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:15:13,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 07:15:13,013 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:301, output treesize:71 [2021-06-05 07:15:13,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:13,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366159678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:13,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:13,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-06-05 07:15:13,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348093465] [2021-06-05 07:15:13,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 07:15:13,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:13,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 07:15:13,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:15:13,148 INFO L87 Difference]: Start difference. First operand 2477 states and 8667 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:13,849 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2021-06-05 07:15:14,168 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 53 [2021-06-05 07:15:14,474 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2021-06-05 07:15:14,847 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2021-06-05 07:15:14,999 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2021-06-05 07:15:15,198 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 62 [2021-06-05 07:15:15,607 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2021-06-05 07:15:21,775 WARN L205 SmtUtils]: Spent 6.13 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-06-05 07:15:22,305 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-06-05 07:15:28,712 WARN L205 SmtUtils]: Spent 6.16 s on a formula simplification. DAG size of input: 73 DAG size of output: 42 [2021-06-05 07:15:29,123 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 61 [2021-06-05 07:15:29,375 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-06-05 07:16:17,940 WARN L205 SmtUtils]: Spent 48.35 s on a formula simplification. DAG size of input: 141 DAG size of output: 108 [2021-06-05 07:16:32,352 WARN L205 SmtUtils]: Spent 14.35 s on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2021-06-05 07:17:07,194 WARN L205 SmtUtils]: Spent 34.74 s on a formula simplification. DAG size of input: 150 DAG size of output: 112 [2021-06-05 07:17:07,342 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-06-05 07:17:07,651 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2021-06-05 07:17:07,958 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-06-05 07:17:08,274 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 68 [2021-06-05 07:17:08,456 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2021-06-05 07:17:08,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:08,681 INFO L93 Difference]: Finished difference Result 4860 states and 16315 transitions. [2021-06-05 07:17:08,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 07:17:08,682 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 07:17:08,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:08,689 INFO L225 Difference]: With dead ends: 4860 [2021-06-05 07:17:08,689 INFO L226 Difference]: Without dead ends: 4830 [2021-06-05 07:17:08,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 159297.3ms TimeCoverageRelationStatistics Valid=803, Invalid=4167, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 07:17:08,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4830 states. [2021-06-05 07:17:08,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4830 to 2466. [2021-06-05 07:17:08,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2466 states, 2465 states have (on average 3.502231237322515) internal successors, (8633), 2465 states have internal predecessors, (8633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:08,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2466 states to 2466 states and 8633 transitions. [2021-06-05 07:17:08,739 INFO L78 Accepts]: Start accepts. Automaton has 2466 states and 8633 transitions. Word has length 29 [2021-06-05 07:17:08,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:08,739 INFO L482 AbstractCegarLoop]: Abstraction has 2466 states and 8633 transitions. [2021-06-05 07:17:08,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:08,739 INFO L276 IsEmpty]: Start isEmpty. Operand 2466 states and 8633 transitions. [2021-06-05 07:17:08,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 07:17:08,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:08,743 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:08,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable804,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:08,964 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:08,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:08,964 INFO L82 PathProgramCache]: Analyzing trace with hash -847199862, now seen corresponding path program 35 times [2021-06-05 07:17:08,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:08,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977695353] [2021-06-05 07:17:08,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:08,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:09,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:09,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:09,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977695353] [2021-06-05 07:17:09,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977695353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:09,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737281984] [2021-06-05 07:17:09,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:09,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 07:17:09,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:17:09,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:17:09,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:09,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:09,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:09,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:09,744 INFO L354 Elim1Store]: treesize reduction 14, result has 75.4 percent of original size [2021-06-05 07:17:09,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 52 [2021-06-05 07:17:09,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:17:09,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:09,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:09,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:09,803 INFO L354 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2021-06-05 07:17:09,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 38 [2021-06-05 07:17:09,815 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 07:17:09,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:17:09,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:09,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:09,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:17:09,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:09,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:17:09,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:17:09,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:09,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:09,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:17:09,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:17:09,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 7 [2021-06-05 07:17:09,832 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 07:17:09,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:09,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:09,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:09,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:09,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:09,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:09,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:09,873 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-06-05 07:17:09,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 23 [2021-06-05 07:17:09,874 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 07:17:09,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:09,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:09,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:09,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:17:09,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 33 treesize of output 97 [2021-06-05 07:17:09,974 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 07:17:09,978 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 07:17:09,979 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 07:17:09,981 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 07:17:09,982 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 07:17:09,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:09,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:09,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:10,053 INFO L354 Elim1Store]: treesize reduction 36, result has 57.6 percent of original size [2021-06-05 07:17:10,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 33 treesize of output 61 [2021-06-05 07:17:10,064 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 07:17:10,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:10,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:10,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:10,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:10,083 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-05 07:17:10,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 19 [2021-06-05 07:17:10,085 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 07:17:10,162 INFO L628 ElimStorePlain]: treesize reduction 112, result has 36.7 percent of original size [2021-06-05 07:17:10,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 07:17:10,163 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:433, output treesize:52 [2021-06-05 07:17:10,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:10,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737281984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:10,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:10,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-06-05 07:17:10,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369694015] [2021-06-05 07:17:10,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 07:17:10,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:10,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 07:17:10,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:17:10,374 INFO L87 Difference]: Start difference. First operand 2466 states and 8633 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:12,378 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-06-05 07:17:12,548 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-06-05 07:17:12,699 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-06-05 07:17:13,052 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-06-05 07:17:13,356 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-05 07:17:13,521 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-06-05 07:17:14,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:14,382 INFO L93 Difference]: Finished difference Result 4518 states and 15011 transitions. [2021-06-05 07:17:14,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 07:17:14,383 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 07:17:14,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:14,389 INFO L225 Difference]: With dead ends: 4518 [2021-06-05 07:17:14,389 INFO L226 Difference]: Without dead ends: 4474 [2021-06-05 07:17:14,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 3669.5ms TimeCoverageRelationStatistics Valid=810, Invalid=3746, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 07:17:14,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4474 states. [2021-06-05 07:17:14,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4474 to 2505. [2021-06-05 07:17:14,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2505 states, 2504 states have (on average 3.5027955271565494) internal successors, (8771), 2504 states have internal predecessors, (8771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:14,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2505 states to 2505 states and 8771 transitions. [2021-06-05 07:17:14,430 INFO L78 Accepts]: Start accepts. Automaton has 2505 states and 8771 transitions. Word has length 29 [2021-06-05 07:17:14,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:14,430 INFO L482 AbstractCegarLoop]: Abstraction has 2505 states and 8771 transitions. [2021-06-05 07:17:14,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:14,430 INFO L276 IsEmpty]: Start isEmpty. Operand 2505 states and 8771 transitions. [2021-06-05 07:17:14,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 07:17:14,433 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:14,433 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:14,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable833,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:14,642 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:14,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:14,642 INFO L82 PathProgramCache]: Analyzing trace with hash -12576832, now seen corresponding path program 36 times [2021-06-05 07:17:14,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:14,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14403169] [2021-06-05 07:17:14,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:14,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:14,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:14,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:14,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14403169] [2021-06-05 07:17:14,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14403169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:14,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759584037] [2021-06-05 07:17:14,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:15,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:17:15,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:17:15,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:17:15,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:15,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:15,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:15,323 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:17:15,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 33 [2021-06-05 07:17:15,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:17:15,338 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 07:17:15,339 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 07:17:15,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:15,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:15,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:15,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:15,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:15,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:15,371 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 07:17:15,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 07:17:15,373 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 07:17:15,375 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 07:17:15,376 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 07:17:15,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:15,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:15,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:15,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:15,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:15,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:15,431 INFO L354 Elim1Store]: treesize reduction 22, result has 60.0 percent of original size [2021-06-05 07:17:15,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 45 [2021-06-05 07:17:15,439 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 07:17:15,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:15,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:15,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:15,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:15,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:15,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:15,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:17:15,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 67 [2021-06-05 07:17:15,503 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 07:17:15,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:15,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:17:15,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:17:15,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:17:15,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:17:15,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-06-05 07:17:15,512 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 07:17:15,514 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 07:17:15,515 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 07:17:15,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:15,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:17:15,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:15,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:15,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:17:15,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:17:15,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 10 [2021-06-05 07:17:15,521 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 07:17:15,567 INFO L628 ElimStorePlain]: treesize reduction 18, result has 66.0 percent of original size [2021-06-05 07:17:15,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 07:17:15,568 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:355, output treesize:35 [2021-06-05 07:17:15,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:15,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759584037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:15,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:15,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 07:17:15,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009563781] [2021-06-05 07:17:15,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:17:15,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:15,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:17:15,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:17:15,635 INFO L87 Difference]: Start difference. First operand 2505 states and 8771 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:17,347 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-06-05 07:17:17,602 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-06-05 07:17:18,001 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-06-05 07:17:18,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:18,393 INFO L93 Difference]: Finished difference Result 4394 states and 14553 transitions. [2021-06-05 07:17:18,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 07:17:18,394 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 07:17:18,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:18,400 INFO L225 Difference]: With dead ends: 4394 [2021-06-05 07:17:18,400 INFO L226 Difference]: Without dead ends: 4364 [2021-06-05 07:17:18,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 2555.2ms TimeCoverageRelationStatistics Valid=590, Invalid=2490, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 07:17:18,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4364 states. [2021-06-05 07:17:18,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4364 to 2537. [2021-06-05 07:17:18,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2537 states, 2536 states have (on average 3.5055205047318614) internal successors, (8890), 2536 states have internal predecessors, (8890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:18,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2537 states to 2537 states and 8890 transitions. [2021-06-05 07:17:18,449 INFO L78 Accepts]: Start accepts. Automaton has 2537 states and 8890 transitions. Word has length 29 [2021-06-05 07:17:18,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:18,449 INFO L482 AbstractCegarLoop]: Abstraction has 2537 states and 8890 transitions. [2021-06-05 07:17:18,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:18,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2537 states and 8890 transitions. [2021-06-05 07:17:18,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 07:17:18,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:18,452 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:18,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable930 [2021-06-05 07:17:18,653 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:18,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:18,653 INFO L82 PathProgramCache]: Analyzing trace with hash -207836590, now seen corresponding path program 37 times [2021-06-05 07:17:18,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:18,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253405035] [2021-06-05 07:17:18,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:18,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:18,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:18,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253405035] [2021-06-05 07:17:18,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253405035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:18,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256259429] [2021-06-05 07:17:18,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:18,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:18,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:17:18,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:19,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:19,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256259429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:19,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:19,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-06-05 07:17:19,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6149950] [2021-06-05 07:17:19,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:17:19,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:19,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:17:19,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:17:19,416 INFO L87 Difference]: Start difference. First operand 2537 states and 8890 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:20,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:20,727 INFO L93 Difference]: Finished difference Result 3675 states and 12063 transitions. [2021-06-05 07:17:20,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:17:20,728 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 07:17:20,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:20,733 INFO L225 Difference]: With dead ends: 3675 [2021-06-05 07:17:20,733 INFO L226 Difference]: Without dead ends: 3645 [2021-06-05 07:17:20,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1396.9ms TimeCoverageRelationStatistics Valid=450, Invalid=1806, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:17:20,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3645 states. [2021-06-05 07:17:20,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3645 to 2550. [2021-06-05 07:17:20,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2549 states have (on average 3.507257748136524) internal successors, (8940), 2549 states have internal predecessors, (8940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:20,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 8940 transitions. [2021-06-05 07:17:20,772 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 8940 transitions. Word has length 29 [2021-06-05 07:17:20,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:20,772 INFO L482 AbstractCegarLoop]: Abstraction has 2550 states and 8940 transitions. [2021-06-05 07:17:20,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:20,772 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 8940 transitions. [2021-06-05 07:17:20,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 07:17:20,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:20,775 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:20,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable965 [2021-06-05 07:17:20,976 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:20,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:20,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1152820346, now seen corresponding path program 25 times [2021-06-05 07:17:20,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:20,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458906429] [2021-06-05 07:17:20,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:21,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:21,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:21,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458906429] [2021-06-05 07:17:21,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458906429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:21,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880561787] [2021-06-05 07:17:21,398 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:21,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:17:21,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:27,770 WARN L205 SmtUtils]: Spent 6.07 s on a formula simplification that was a NOOP. DAG size: 42 Received shutdown request... [2021-06-05 07:17:50,078 WARN L222 SmtUtils]: Removed 5 from assertion stack [2021-06-05 07:17:50,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1022 [2021-06-05 07:17:50,278 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 07:17:50,280 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 07:17:50,281 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 07:17:50,281 INFO L202 PluginConnector]: Adding new model sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 07:17:50 BasicIcfg [2021-06-05 07:17:50,281 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 07:17:50,282 INFO L168 Benchmark]: Toolchain (without parser) took 855222.10 ms. Allocated memory was 358.6 MB in the beginning and 639.6 MB in the end (delta: 281.0 MB). Free memory was 337.8 MB in the beginning and 366.5 MB in the end (delta: -28.8 MB). Peak memory consumption was 254.4 MB. Max. memory is 16.0 GB. [2021-06-05 07:17:50,282 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 358.6 MB. Free memory was 339.0 MB in the beginning and 338.9 MB in the end (delta: 71.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 07:17:50,282 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.13 ms. Allocated memory is still 358.6 MB. Free memory was 337.7 MB in the beginning and 336.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 07:17:50,282 INFO L168 Benchmark]: Boogie Preprocessor took 24.23 ms. Allocated memory is still 358.6 MB. Free memory was 336.3 MB in the beginning and 335.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 07:17:50,282 INFO L168 Benchmark]: RCFGBuilder took 260.73 ms. Allocated memory is still 358.6 MB. Free memory was 335.2 MB in the beginning and 321.8 MB in the end (delta: 13.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 07:17:50,282 INFO L168 Benchmark]: TraceAbstraction took 854901.94 ms. Allocated memory was 358.6 MB in the beginning and 639.6 MB in the end (delta: 281.0 MB). Free memory was 321.3 MB in the beginning and 366.5 MB in the end (delta: -45.2 MB). Peak memory consumption was 239.7 MB. Max. memory is 16.0 GB. [2021-06-05 07:17:50,282 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 358.6 MB. Free memory was 339.0 MB in the beginning and 338.9 MB in the end (delta: 71.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 29.13 ms. Allocated memory is still 358.6 MB. Free memory was 337.7 MB in the beginning and 336.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 24.23 ms. Allocated memory is still 358.6 MB. Free memory was 336.3 MB in the beginning and 335.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 260.73 ms. Allocated memory is still 358.6 MB. Free memory was 335.2 MB in the beginning and 321.8 MB in the end (delta: 13.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 854901.94 ms. Allocated memory was 358.6 MB in the beginning and 639.6 MB in the end (delta: 281.0 MB). Free memory was 321.3 MB in the beginning and 366.5 MB in the end (delta: -45.2 MB). Peak memory consumption was 239.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 30 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 102 for 22174ms.. - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 30 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 102 for 22174ms.. - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 30 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 102 for 22174ms.. - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 30 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 102 for 22174ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 45 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 854763.8ms, OverallIterations: 100, TraceHistogramMax: 2, EmptinessCheckTime: 253.5ms, AutomataDifference: 623233.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 58.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4096 SDtfs, 22818 SDslu, 26110 SDs, 0 SdLazy, 42444 SolverSat, 3824 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 40877.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5051 GetRequests, 1980 SyntacticMatches, 73 SemanticMatches, 2998 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36385 ImplicationChecksByTransitivity, 728759.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2550occurred in iteration=99, InterpolantAutomatonStates: 2566, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2606.5ms AutomataMinimizationTime, 99 MinimizatonAttempts, 87106 StatesRemovedByMinimization, 99 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 365.9ms SsaConstructionTime, 973.8ms SatisfiabilityAnalysisTime, 176434.6ms InterpolantComputationTime, 5124 NumberOfCodeBlocks, 5124 NumberOfCodeBlocksAsserted, 296 NumberOfCheckSat, 4934 ConstructedInterpolants, 60 QuantifiedInterpolants, 53856 SizeOfPredicates, 384 NumberOfNonLiveVariables, 5306 ConjunctsInSsa, 972 ConjunctsInUnsatCore, 190 InterpolantComputations, 8 PerfectInterpolantSequences, 247/879 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown